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Begildayeva T, Theerthagiri J, Limphirat W, Min A, Kheawhom S, Choi MY. Deciphering Indirect Nitrite Reduction to Ammonia in High-Entropy Electrocatalysts Using In Situ Raman and X-ray Absorption Spectroscopies. Small 2024:e2400538. [PMID: 38600896 DOI: 10.1002/smll.202400538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/27/2024] [Indexed: 04/12/2024]
Abstract
This research adopts a new method combining calcination and pulsed laser irradiation in liquids to induce a controlled phase transformation of Fe, Co, Ni, Cu, and Mn transition-metal-based high-entropy Prussian blue analogs into single-phase spinel high-entropy oxide and face-centered cubic high-entropy alloy (HEA). The synthesized HEA, characterized by its highly conductive nature and reactive surface, demonstrates exceptional performance in capturing low-level nitrite (NO2 -) in an electrolyte, which leads to its efficient conversion into ammonium (NH4 +) with a Faradaic efficiency of 79.77% and N selectivity of 61.49% at -0.8 V versus Ag/AgCl. In addition, the HEA exhibits remarkable durability in the continuous nitrite reduction reaction (NO2 -RR), converting 79.35% of the initial NO2 - into NH4 + with an impressive yield of 1101.48 µm h-1 cm-2. By employing advanced X-ray absorption and in situ electrochemical Raman techniques, this study provides insights into the indirect NO2 -RR, highlighting the versatility and efficacy of HEA in sustainable electrochemical applications.
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Affiliation(s)
- Talshyn Begildayeva
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Jayaraman Theerthagiri
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Wanwisa Limphirat
- Beamline Operation Division, Synchrotron Light Research Institute (SLRI), Nakhon Ratchasima, 30000, Thailand
| | - Ahreum Min
- Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Soorathep Kheawhom
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Myong Yong Choi
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea
- Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, Republic of Korea
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2
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Saha D, Yu HJ, Wang J, Prateek, Chen X, Tang C, Senger C, Pagaduan JN, Katsumata R, Carter KR, Zhou G, Bai P, Wu N, Watkins JJ. Mesoporous Single Atom-Cluster Fe-N/C Oxygen Evolution Electrocatalysts Synthesized with Bottlebrush Block Copolymer-Templated Rapid Thermal Annealing. ACS Appl Mater Interfaces 2024; 16:13729-13744. [PMID: 38457643 DOI: 10.1021/acsami.3c18693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
Current electrocatalysts for oxygen evolution reaction (OER) are either expensive (such as IrO2, RuO2) or/and exhibit high overpotential as well as sluggish kinetics. This article reports mesoporous earth-abundant iron (Fe)-nitrogen (N) doped carbon electrocatalysts with iron clusters and closely surrounding Fe-N4 active sites. Unique to this work is that the mechanically stable mesoporous carbon-matrix structure (79 nm in pore size) with well-dispersed nitrogen-coordinated Fe single atom-cluster is synthesized via rapid thermal annealing (RTA) within only minutes using a self-assembled bottlebrush block copolymer (BBCP) melamine-formaldehyde resin composite template. The resulting porous structure and domain size can be tuned with the degree of polymerization of the BBCP backbone, which increases the electrochemically active surface area and improves electron transfer and mass transport for an effective OER process. The optimized electrocatalyst shows a required potential of 1.48 V (versus RHE) to obtain the current density of 10 mA/cm2 in 1 M KOH aqueous electrolyte and a small Tafel slope of 55 mV/decade at a given overpotential of 250 mV, which is significantly lower than recently reported earth-abundant electrocatalysts. Importantly, the Fe single-atom nitrogen coordination environment facilitates the surface reconstruction into a highly active oxyhydroxide under OER conditions, as revealed by X-ray photoelectron spectroscopy and in situ Raman spectroscopy, while the atomic clusters boost the single atoms reactive sites to prevent demetalation during the OER process. Density functional theory (DFT) calculations support that the iron nitrogen environment and reconstructed oxyhydroxides are electrocatalytically active sites as the kinetics barrier is largely reduced. This work has opened a new avenue for simple, rapid synthesis of inexpensive, earth-abundant, tailorable, mechanically stable, mesoporous carbon-coordinated single-atom electrocatalysts that can be used for renewable energy production.
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Affiliation(s)
- Dipankar Saha
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Hsin-Jung Yu
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Jiacheng Wang
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Prateek
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Xiaobo Chen
- Department of Materials Science and Engineering, Binghamton University, State University of New York at Binghamton, Binghamton, New York 13850, United States
| | - Chaoyun Tang
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Claire Senger
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - James Nicolas Pagaduan
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Reika Katsumata
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Kenneth R Carter
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Guangwen Zhou
- Department of Materials Science and Engineering, Binghamton University, State University of New York at Binghamton, Binghamton, New York 13850, United States
| | - Peng Bai
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Nianqiang Wu
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - James J Watkins
- Conte Center for Polymer Research, Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
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3
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Guo X, He X, Liu X, Sun S, Sun H, Dong K, Li T, Yao Y, Xie T, Zheng D, Luo Y, Chen J, Liu Q, Li L, Chu W, Jiang Z, Sun X, Tang B. Arming Amorphous NiMoO 4 on Nickel Phosphide Enables Highly Stable Alkaline Seawater Oxidation. Small 2024:e2400141. [PMID: 38431944 DOI: 10.1002/smll.202400141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 02/16/2024] [Indexed: 03/05/2024]
Abstract
Seawater electrolysis holds tremendous promise for the generation of green hydrogen (H2 ). However, the system of seawater-to-H2 faces significant hurdles, primarily due to the corrosive effects of chlorine compounds, which can cause severe anodic deterioration. Here, a nickel phosphide nanosheet array with amorphous NiMoO4 layer on Ni foam (Ni2 P@NiMoO4 /NF) is reported as a highly efficient and stable electrocatalyst for oxygen evolution reaction (OER) in alkaline seawater. Such Ni2 P@NiMoO4 /NF requires overpotentials of just 343 and 370 mV to achieve industrial-level current densities of 500 and 1000 mA cm-2 , respectively, surpassing that of Ni2 P/NF (470 and 555 mV). Furthermore, it maintains consistent electrolysis for over 500 h, a significant improvement compared to that of Ni2 P/NF (120 h) and Ni(OH)2 /NF (65 h). Electrochemical in situ Raman spectroscopy, stability testing, and chloride extraction analysis reveal that is situ formed MoO4 2- /PO4 3- from Ni2 P@NiMoO4 during the OER test to the electrode surface, thus effectively repelling Cl- and hindering the formation of harmful ClO- .
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Affiliation(s)
- Xiankun Guo
- College of Science, Xihua University, Chengdu, Sichuan, 610054, China
| | - Xun He
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Xuwei Liu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Shengjun Sun
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Hang Sun
- Department of Science and Environmental Studies, Faculty of Liberal Arts and Social Science, The Education University of Hong Kong, Hong Kong, 999077, China
| | - Kai Dong
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Tengyue Li
- College of Science, Xihua University, Chengdu, Sichuan, 610054, China
| | - Yongchao Yao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Ting Xie
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Dongdong Zheng
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Yongsong Luo
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Jie Chen
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Qian Liu
- Institute for Advanced Study, Chengdu University, Chengdu, Sichuan, 610106, China
| | - Luming Li
- Institute for Advanced Study, Chengdu University, Chengdu, Sichuan, 610106, China
| | - Wei Chu
- Institute for Advanced Study, Chengdu University, Chengdu, Sichuan, 610106, China
| | - Zhenju Jiang
- College of Science, Xihua University, Chengdu, Sichuan, 610054, China
| | - Xuping Sun
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China
- Laoshan Laboratory, Qingdao, Shandong, 266237, China
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4
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Wu PF, Yang YQ, Xi HY, Si Y, Chu YH, Su XZ, Yan WS, You TT, Gao YK, Wang Y, Chen WX, Huang YY, Yin PG. Operando Spectroscopy Observation of Mo Clusters-Ti 3 C 2 T X Catalyst/Support Interface's Dynamic Evolution in Hydrogen Evolution Reaction. Small 2024; 20:e2306716. [PMID: 37863816 DOI: 10.1002/smll.202306716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/01/2023] [Indexed: 10/22/2023]
Abstract
The interaction between catalyst and support plays an important role in electrocatalytic hydrogen evolution (HER), which may explain the improvement in performance by phase transition or structural remodeling. However, the intrinsic behavior of these catalysts (dynamic evolution of the interface under bias, structural/morphological transformation, stability) has not been clearly monitored, while the operando technology does well in capturing the dynamic changes in the reaction process in real time to determine the actual active site. In this paper, nitrogen-doped molybdenum atom-clusters on Ti3 C2 TX (MoACs /N-Ti3 C2 TX ) is used as a model catalyst to reveal the dynamic evolution of MoAcs on Ti3 C2 TX during the HER process. Operando X-ray absorption structure (XAS) theoretical calculation and in situ Raman spectroscopy showed that the Mo cluster structure evolves to a 6-coordinated monatomic Mo structure under working conditions, exposing more active sites and thus improving the catalytic performance. It shows excellent HER performance comparable to that of commercial Pt/C, including an overpotential of 60 mV at 10 mA cm-2 , a small Tafel slope (56 mV dec-1 ), and high activity and durability. This study provides a unique perspective for investigating the evolution of species, interfacial migration mechanisms, and sources of activity-enhancing compounds in the process of electroreduction.
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Affiliation(s)
- Peng Fei Wu
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yu Qi Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Hong Yan Xi
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yang Si
- Laboratory of Zhangjiang, Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Yong Heng Chu
- Laboratory of Zhangjiang, Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Xiao Zhi Su
- Laboratory of Zhangjiang, Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Wen Sheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - Ting Ting You
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yu Kun Gao
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yu Wang
- Laboratory of Zhangjiang, Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Wen Xing Chen
- Energy and Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yu Ying Huang
- Laboratory of Zhangjiang, Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Peng Gang Yin
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
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5
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Chen M, Zhang Y, Chen J, Wang R, Zhang B, Song B, Xu P. In Situ Raman Study of Surface Reconstruction of FeOOH/Ni 3 S 2 Oxygen Evolution Reaction Electrocatalysts. Small 2024:e2309371. [PMID: 38169101 DOI: 10.1002/smll.202309371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/03/2023] [Indexed: 01/05/2024]
Abstract
Construction of heterojunctions is an effective strategy to enhanced electrocatalytic oxygen evolution reaction (OER), but the structural evolution of the active phases and synergistic mechanism still lack in-depth understanding. Here, an FeOOH/Ni3 S2 heterostructure supported on nickel foam (NF) through a two-step hydrothermal-chemical etching method is reported. In situ Raman spectroscopy study of the surface reconstruction behaviors of FeOOH/Ni3 S2 /NF indicates that Ni3 S2 can be rapidly converted to NiOOH, accompanied by the phase transition from α-FeOOH to β-FeOOH during the OER process. Importantly, a deep analysis of Ni─O bond reveals that the phase transition of FeOOH can regulate the lattice disorder of NiOOH for improved catalytic activity. Density functional theory (DFT) calculations further confirm that NiOOH/FeOOH heterostructure possess strengthened adsorption for O-containing intermediates, as well as lower energy barrier toward the OER. As a result, FeOOH/Ni3 S2 /NF exhibits promising OER activity and stability in alkaline conditions, requiring an overpotential of 268 mV @ 100 mA cm-2 and long-term stability over 200 h at a current density of 200 mA cm-2 . This work provides a new perspective for understanding the synergistic mechanism of heterogeneous electrocatalysts during the OER process.
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Affiliation(s)
- Mengxin Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Yuanyuan Zhang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Harbin Normal University, Harbin, 150025, P. R. China
| | - Ji Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Ran Wang
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Bin Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Bo Song
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Ping Xu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
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6
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Li J, Wu X, Jian C, Qiao X, Wan F, Wu Z, Zhong B, Chen Y, Guo X. GO-CoNiP New Composite Material Modified Separator for Long Cycle Lithium-Sulfur Batteries. Small 2023:e2307912. [PMID: 38048540 DOI: 10.1002/smll.202307912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/28/2023] [Indexed: 12/06/2023]
Abstract
Lithium-sulfur batteries with high capacity are considered the most promising candidates for next-generation energy storage systems. Mitigating the shuttle reaction and promoting catalytic conversion within the battery are major challenges in the development of high-performance lithium-sulfur batteries. To solve these problems, a novel composite material GO-CoNiP is synthesized in this study. The material has excellent conductivity and abundant active sites to adsorb polysulfides and improve reaction kinetics within the battery. The initial capacity of the GO-CoNiP separator battery at 1 C is 889.4 mAh g-1 , and the single-cycle decay is 0.063% after 1000 cycles. In the 4 C high-rate test, the single-cycle decay is only 0.068% after 400 cycles. The initial capacity is as high as 828.2 mAh g-1 under high sulfur loading (7.3 mg cm-2 ). In addition, high and low-temperature performance tests are performed on the GO-CoNiP separator battery. The first cycle discharge reaches 810.9 mAh g-1 at a low temperature of 0 °C, and the first cycle discharge reaches 1064.8 mAh g-1 at a high temperature of 60 °C, and both can run stably for 120 cycles. In addition, in situ Raman tests are conducted to explain the adsorption of polysulfides by GO-CoNiP from a deeper level.
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Affiliation(s)
- Jiaqi Li
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xinxiang Wu
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Caifeng Jian
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xianyan Qiao
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Fang Wan
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Zhenguo Wu
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Benhe Zhong
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yanxiao Chen
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xiaodong Guo
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China
- Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia
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7
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Shi F, Guo X, Chen C, Zhuang L, Yu J, Qi Q, Zhu Y, Xu ZL, Lau SP. Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium-Sulfur Batteries. Nano Lett 2023; 23:7906-7913. [PMID: 37619971 PMCID: PMC10510576 DOI: 10.1021/acs.nanolett.3c01633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/02/2023] [Indexed: 08/26/2023]
Abstract
A recent study of liquid sulfur produced in an electrochemical cell has prompted further investigation into regulating Li-S oxidation chemistry. In this research, we examined the liquid-to-solid sulfur transition dynamics by visually observing the electrochemical generation of sulfur on a graphene-based substrate. We investigated the charging of polysulfides at various current densities and discovered a quantitative correlation between the size and number density of liquid sulfur droplets and the applied current. However, the areal capacities exhibited less sensitivity. This observation offers valuable insights for designing fast-charging sulfur cathodes. By incorporating liquid sulfur into Li-S batteries with a high sulfur loading of 4.2 mg cm-2, the capacity retention can reach ∼100%, even when increasing the rate from 0.1 to 3 C. This study contributes to a better understanding of the kinetics involved in the liquid-solid sulfur growth in Li-S chemistry and presents viable strategies for optimizing fast-charging operations.
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Affiliation(s)
- Fangyi Shi
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
- Research
Institute for Smart Energy, The Hong Kong
Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Xuyun Guo
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Chunhong Chen
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
| | - Lyuchao Zhuang
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Jingya Yu
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
| | - Qi Qi
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
| | - Ye Zhu
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
- Research
Institute for Smart Energy, The Hong Kong
Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Zheng-Long Xu
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
- Research
Center of Deep Space Exploration, The Hong
Kong Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Shu Ping Lau
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
- Research
Institute for Smart Energy, The Hong Kong
Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
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8
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Yin H, Xiao H, Qin R, Chen J, Tan F, Zhang W, Zhao J, Zeng L, Hu Y, Pan F, Lei P, Yuan S, Qian L, Su Y, Zhang Z. Lattice Strain Mediated Reversible Reconstruction in CoMoO 4·0.69H 2O for Intermittent Oxygen Evolution. ACS Appl Mater Interfaces 2023; 15:20100-20109. [PMID: 37058142 DOI: 10.1021/acsami.3c00544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
A heterogeneous interface usually plays a versatile role in modulating catalysis and the durability of hybrid electrocatalysts for oxygen evolution reaction (OER), and its intrinsic mechanism is still in dispute due to an uncertain correlation of initial, intermediate and active phases. In this article, the CoMoO4·0.69H2O/Co3O4 heterogeneous interface is configured to understand the evolution kinetics of these correlated phases. Due to the chemically and electrochemically "inert" character of Co3O4 support, lattice strain with 3.31% tuning magnitude in primary CoMoO4·0.69H2O can be inherited after spontaneous dissolution of molybdenum cations in electrolyte, dominating catalytic activity of the reconstructed CoOOH. In situ Raman spectroscopy demonstrates reversible conversion between active CoOOH and amorphous cobalt oxide during OER when positive and negative potentials are sequentially supplied onto hybrid catalysts with favorable strain. Therefore, superior durability with negligible decay after 10 cycles is experimentally identified for intermittent oxygen evolution. Theoretical calculations indicate that appropriate stress within the electrocatalyst could reduce the reaction energy barrier and enhance the OER performance by optimizing the adsorption of intermediates.
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Affiliation(s)
- Hongxia Yin
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Hengbo Xiao
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Ruimin Qin
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Jin Chen
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Fa Tan
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Wu Zhang
- China Copper Huazhong Copper Cooperation Limited, Xialu District, Huangshi 435004, P. R. China
| | - Jian Zhao
- China Copper Huazhong Copper Cooperation Limited, Xialu District, Huangshi 435004, P. R. China
| | - Liqing Zeng
- China Copper Huazhong Copper Cooperation Limited, Xialu District, Huangshi 435004, P. R. China
| | - Yufeng Hu
- China Copper Huazhong Copper Cooperation Limited, Xialu District, Huangshi 435004, P. R. China
| | - Fei Pan
- China Copper Huazhong Copper Cooperation Limited, Xialu District, Huangshi 435004, P. R. China
| | - Pengxiang Lei
- School of Chemistry and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P. R. China
| | - Songliu Yuan
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Lihua Qian
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Yaqiong Su
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Zhen Zhang
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. China
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9
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Gong F, Feng Y, Fang YH, Hsu YK, Chen YC. Dual-Ion Co-intercalation Mechanism on a Na 2V 6O 16·3H 2O Cathode with a Commercial-Level Mass Loading for Aqueous Zinc-Ion Batteries with High Areal Capacity. ACS Appl Mater Interfaces 2023; 15:18808-18818. [PMID: 37036119 DOI: 10.1021/acsami.2c22728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
A proton (H+) and zinc ion (Zn2+) co-insertion model is put forward in this study to elucidate the capacity origin of an aqueous zinc ion battery (ZIB) based on a heavily loaded (∼15 mg cm-2) cathode, which consists of Na2V6O16·3H2O (NVO) embedded particularly in the macropores of activated carbon cloth (ACC), coupled with a highly stable Zn/In anode. The confinement effect of these porous channels not only prevents the detachment of NVO from ACC but also well mitigates its volume change resulting from H+ and Zn2+ co-intercalation, which collectively render the stability of NVO/ACC markedly enhanced. Moreover, the bicontinuous structure of NVO/ACC, as a result of the self-interlacing of intrapore NVO, which is first engineered into the nanobelts, and their interlocking with the carbon fibers of ACC, simultaneously giving rise to a solid and a holey framework, is favorable to the electron and ion transport throughout the entire electrode. The synergistic effect of such facile charge transfer kinetics and the high packing density of NVO in the cathode endows ZIBs with not only a good rate performance but also an exceptional areal capacity amounting to 4.6 mAh cm-2, far surpassing those reported for additional vanadium-based counterparts reported in the literature.
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Affiliation(s)
- Feiran Gong
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3, Yinlian Road, Lingang, Shanghai 201306, People's Republic of China
| | - Yichen Feng
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3, Yinlian Road, Lingang, Shanghai 201306, People's Republic of China
| | - Yu-Hung Fang
- Department of Opto-Electronic Engineering, National Dong Hwa University, No. 1, Sec. 2, Da Hsueh Road, Shoufeng, Hualien 97401, Taiwan
| | - Yu-Kuei Hsu
- Department of Opto-Electronic Engineering, National Dong Hwa University, No. 1, Sec. 2, Da Hsueh Road, Shoufeng, Hualien 97401, Taiwan
| | - Ying-Chu Chen
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3, Yinlian Road, Lingang, Shanghai 201306, People's Republic of China
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10
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Pezzotti G, Ofuji S, Imamura H, Adachi T, Yamamoto T, Kanamura N, Ohgitani E, Marin E, Zhu W, Mazda O, Togo A, Kimura S, Iwata T, Shiba H, Ouhara K, Aoki T, Kawai T. In Situ Raman Analysis of Biofilm Exopolysaccharides Formed in Streptococcus mutans and Streptococcus sanguinis Commensal Cultures. Int J Mol Sci 2023; 24:ijms24076694. [PMID: 37047667 PMCID: PMC10095091 DOI: 10.3390/ijms24076694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 04/14/2023] Open
Abstract
This study probed in vitro the mechanisms of competition/coexistence between Streptococcus sanguinis (known for being correlated with health in the oral cavity) and Streptococcus mutans (responsible for aciduric oral environment and formation of caries) by means of quantitative Raman spectroscopy and imaging. In situ Raman assessments of live bacterial culture/coculture focusing on biofilm exopolysaccharides supported the hypothesis that both species engaged in antagonistic interactions. Experiments of simultaneous colonization always resulted in coexistence, but they also revealed fundamental alterations of the biofilm with respect to their water-insoluble glucan structure. Raman spectra (collected at fixed time but different bacterial ratios) showed clear changes in chemical bonds in glucans, which pointed to an action by Streptococcus sanguinis to discontinue the impermeability of the biofilm constructed by Streptococcus mutans. The concurrent effects of glycosidic bond cleavage in water-insoluble α - 1,3-glucan and oxidation at various sites in glucans' molecular chains supported the hypothesis that secretion of oxygen radicals was the main "chemical weapon" used by Streptococcus sanguinis in coculture.
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Affiliation(s)
- Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
- Department of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
- Department of Molecular Science and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172 Venice, Italy
| | - Satomi Ofuji
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
| | - Hayata Imamura
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Tetsuya Adachi
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Toshiro Yamamoto
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Narisato Kanamura
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Eriko Ohgitani
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
| | - Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Wenliang Zhu
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
| | - Osam Mazda
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
| | - Azusa Togo
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Satoshi Kimura
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Tadahisa Iwata
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hideki Shiba
- Department of Biological Endodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Kazuhisa Ouhara
- Department of Periodontal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Takashi Aoki
- Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
| | - Toshihisa Kawai
- Department of Oral Science and Translational Research, College of Dental Medicine, Nova Southeastern University, 3301 College Ave, Fort Lauderdale, FL 33314, USA
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11
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Lu H, Li L, Wu Q, Mu S, Zhao R, Zheng X, Long C, Li Q, Liu H, Cui C. Cu +-Mediated CO Coordination for Promoting C-C Coupling for CO 2 and CO Electroreduction. ACS Appl Mater Interfaces 2023; 15:13228-13237. [PMID: 36877774 DOI: 10.1021/acsami.3c01448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Selective electrochemical upgrading of CO2 to multicarbon (C2+) products requires a C-C coupling process, yet the underlying promoting mechanism of widely involved Cu oxidation states remains largely unclear, hindering the subtle design of efficient catalysts. Herein, we unveil the critical role of Cu+ in promoting C-C coupling via coordination with a CO intermediate during electrochemical CO2 reduction. We find that, relative to other halogen anions, iodide (I-) in HCO3- electrolytes accelerates the generation of strongly oxidative hydroxyl radicals that accounts for the formation of Cu+, which can be dynamically stabilized by I- via the formation of CuI. The in situ generated CO intermediate strongly binds to CuI sites, forming nonclassical Cu(CO)n+ complexes, leading to an approximately 3.0-fold increase of C2+ Faradaic efficiency at -0.9 VRHE relative to that of I--free Cu surfaces. Accordingly, a deliberate introduction of CuI into I--containing HCO3- electrolytes for direct CO electroreduction brings about a 4.3-fold higher C2+ selectivity. This work provides insights into the role of Cu+ in C-C coupling and the enhanced C2+ selectivity for CO2 and CO electrochemical reduction.
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Affiliation(s)
- Honglei Lu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Lei Li
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qianbao Wu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Shijia Mu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Ruijuan Zhao
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Xia Zheng
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Chang Long
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qing Li
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Hongfei Liu
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Chunhua Cui
- Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
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12
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Thakur MK, Haider G, Sonia FJ, Plšek J, Rodriguez A, Mishra V, Panda J, Gedeon O, Mergl M, Volochanskyi O, Valeš V, Frank O, Vejpravova J, Kalbáč M. Isotope Engineered Fluorinated Single and Bilayer Graphene: Insights into Fluorination Selectivity, Stability, and Defect Passivation. Small 2023; 19:e2205575. [PMID: 36593530 DOI: 10.1002/smll.202205575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Tailoring the physicochemical properties of graphene through functionalization remains a major interest for next-generation technological applications. However, defect formation due to functionalization greatly endangers the intrinsic properties of graphene, which remains a serious concern. Despite numerous attempts to address this issue, a comprehensive analysis has not been conducted. This work reports a two-step fluorination process to stabilize the fluorinated graphene and obtain control over the fluorination-induced defects in graphene layers. The structural, electronic and isotope-mass-sensitive spectroscopic characterization unveils several not-yet-resolved facts, such as fluorination sites and CF bond stability in partially-fluorinated graphene (F-SLG). The stability of fluorine has been correlated to fluorine co-shared between two graphene layers in fluorinated-bilayer-graphene (F-BLG). The desorption energy of co-shared fluorine is an order of magnitude higher than the CF bond energy in F-SLG due to the electrostatic interaction and the inhibition of defluorination in the F-BLG. Additionally, F-BLG exhibits enhanced light-matter interaction, which has been utilized to design a proof-of-concept field-effect phototransistor that produces high photocurrent response at a time <200 µs. Thus, the study paves a new avenue for the in-depth understanding and practical utilization of fluorinated graphenic carbon.
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Affiliation(s)
- Mukesh Kumar Thakur
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Golam Haider
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Farjana J Sonia
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Jan Plšek
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Alvaro Rodriguez
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Vipin Mishra
- Department of Glass and Ceramics, University of Chemistry and Technology, Prague, Technická 5, 16628, Prague 6, Czech Republic
| | - Jaganandha Panda
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Ondrej Gedeon
- Department of Glass and Ceramics, University of Chemistry and Technology, Prague, Technická 5, 16628, Prague 6, Czech Republic
| | - Martin Mergl
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Oleksandr Volochanskyi
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Václav Valeš
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Otakar Frank
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
| | - Jana Vejpravova
- Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116, Prague 2, Czech Republic
| | - Martin Kalbáč
- J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 18200, Prague 8, Czech Republic
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13
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Begildayeva T, Theerthagiri J, Lee SJ, Yu Y, Choi MY. Unraveling the Synergy of Anion Modulation on Co Electrocatalysts by Pulsed Laser for Water Splitting: Intermediate Capturing by In Situ/Operando Raman Studies. Small 2022; 18:e2204309. [PMID: 36192152 DOI: 10.1002/smll.202204309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/30/2022] [Indexed: 06/16/2023]
Abstract
Herein, the authors produce Co-based (Co3 (PO4 )2 , Co3 O4 , and Co9 S8 ) electrocatalysts via pulsed laser ablation in liquid (PLAL) to explore the synergy of anion modulation on phase-selective active sites in the electrocatalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Co3 (PO4 )2 displays an ultralow overpotential of 230 mV at 10 mA cm-2 with 48.5 mV dec-1 Tafel slope that outperforms the state-of-the-art Ir/C in OER due to its high intrinsic activity. Meanwhile, Co9 S8 exhibits the highest HER performance known to the authors among the synthesized Co-based catalysts, showing the lowest overpotential of 361 mV at 10 mA cm-2 with 95.8 mV dec-1 Tafel slope in the alkaline medium and producing H2 gas with ≈500 mmol g-1 h-1 yield rate under -0.45 V versus RHE. The identified surface reactive intermediates over in situ electrochemical-Raman spectroscopy reveal that cobalt(hydr)oxides with higher oxidation states of Co-cation forming under oxidizing potentials on the electrode-electrolyte surface of Co3 (PO4 )2 facilitate the OER, while Co(OH)2 facilitate the HER. Notably, the fabricated two-electrode electrolyzers using Co3 (PO4 )2 , Co3 O4 , and Co9 S8 electrocatalysts deliver the cell potentials ≈2.01, 2.11, and 1.89 V, respectively, at 10 mA cm-2 . This work not only shows PLAL-synthesized electrocatalysts as promising candidates for water splitting, but also provides an underlying principle for advanced energy-conversion catalysts and beyond.
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Affiliation(s)
- Talshyn Begildayeva
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Jayaraman Theerthagiri
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Seung Jun Lee
- Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, South Korea
| | - Yiseul Yu
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Myong Yong Choi
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
- Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, South Korea
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14
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Mezzacappa M, Alameri D, Thomas B, Kim Y, Lei CH, Kuljanishvili I. In Situ Measurements of Strain Evolution in Graphene/Boron Nitride Heterostructures Using a Non-Destructive Raman Spectroscopy Approach. Nanomaterials (Basel) 2022; 12:3060. [PMID: 36080097 PMCID: PMC9458030 DOI: 10.3390/nano12173060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/28/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
The mechanical properties of engineered van der Waals (vdW) 2D materials and heterostructures are critically important for their implementation into practical applications. Using a non-destructive Raman spectroscopy approach, this study investigates the strain evolution of single-layer graphene (SLGr) and few-layered boron nitride/graphene (FLBN/SLGr) heterostructures. The prepared 2D materials are synthesized via chemical vapor deposition (CVD) method and then transferred onto flexible polyethylene terephthalate (PET) substrates for subsequent strain measurements. For this study, a custom-built mechanical device-jig is designed and manufactured in-house to be used as an insert for the 3D piezoelectric stage of the Raman system. In situ investigation of the effects of applied strain in graphene detectable via Raman spectral data in characteristic bonds within SLGr and FLBN/SLGr heterostructures is carried out. The in situ strain evolution of the FLBN/SLGr heterostructures is obtained in the range of (0-0.5%) strain. It is found that, under the same strain, SLG exhibits a higher Raman shift in the 2D band as compared with FLBN/SLGr heterostructures. This research leads to a better understanding of strain dissipation in vertical 2D heterostacks, which could help improve the design and engineering of custom interfaces and, subsequently, control lattice structure and electronic properties. Moreover, this study can provide a new systematic approach for precise in situ strain assessment and measurements of other CVD-grown 2D materials and their heterostructures on a large scale for manufacturing a variety of future micro- and nano-scale devices on flexible substrates.
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Affiliation(s)
- Marc Mezzacappa
- Department of Aerospace and Mechanical Engineering, Saint Louis University, St. Louis, MO 63103, USA
- Department of Physics, Saint Louis University, St. Louis, MO 63103, USA
| | - Dheyaa Alameri
- Department of Physics, Saint Louis University, St. Louis, MO 63103, USA
- Department of Physics, College of Science, University of Misan, Maysan 62001, Iraq
| | - Brian Thomas
- Department of Aerospace and Mechanical Engineering, Saint Louis University, St. Louis, MO 63103, USA
- Department of Physics, Saint Louis University, St. Louis, MO 63103, USA
| | - Yoosuk Kim
- Department of Physics, Saint Louis University, St. Louis, MO 63103, USA
| | - Chi-Hou Lei
- Department of Aerospace and Mechanical Engineering, Saint Louis University, St. Louis, MO 63103, USA
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15
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Naveen MH, Bui TL, Lee L, Khan R, Chung W, Thota R, Joo SW, Bang JH. Nanostructuring Matters: Stabilization of Electrocatalytic Oxygen Evolution Reaction Activity of ZnCo 2O 4 by Zinc Leaching. ACS Appl Mater Interfaces 2022; 14:15165-15175. [PMID: 35319178 DOI: 10.1021/acsami.1c24403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite the enormous attention paid to cobalt oxide materials as efficient water splitting electrocatalysts, a deep understanding of their activity discrepancy is still elusive. In this work, we showed that stabilization of the internally generated oxygen evolution reaction (OER) active phase (oxyhydroxide) is crucial for ZnCo2O4 electrocatalysts. A systematic evaluation of the bulk and nanostructured ZnCo2O4 system concomitant with nanostructured Co3O4 showed that leaching of Zn is the driving force behind the near-surface transformation to the oxyhydroxide phase. The relative contribution to this near-surface reconstruction was found to be surface-sensitive. The electrochemical observations combined with Raman and impedance spectroscopy revealed that the good catalytic activity could be attributed to the formation of the cobalt oxyhydroxide phase, which was created by the dissolution of Zn from the nanostructured surface. Moreover, this study sheds light on previous contradicting postulates regarding the discrepancy of the OER activity of ZnCo2O4. Our finding regarding the formation of the OER active phase in spinel Zn-Co oxide will motivate researchers to focus more on the near-surface reconstruction behavior of cobalt-based oxide electrocatalysts in the future.
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Affiliation(s)
- Malenahalli H Naveen
- Nanosensor Research Institute, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Thanh Lam Bui
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea
| | - Lanlee Lee
- Department of Bionano Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Rizwan Khan
- Department of Bionano Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Woowon Chung
- Department of Bionano Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Raju Thota
- Nanosensor Research Institute, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Sang-Woo Joo
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea
| | - Jin Ho Bang
- Department of Chemical and Molecular Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
- Department of Applied Chemistry, Center for Bionano Intelligence Education and Research, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
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16
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Perlitz JFA, Gentner L, Braeuer PAB, Will S. Measurement of Secondary Structure Changes in Poly-L-lysine and Lysozyme during Acoustically Levitated Single Droplet Drying Experiments by In Situ Raman Spectroscopy. Sensors (Basel) 2022; 22:1111. [PMID: 35161856 DOI: 10.3390/s22031111] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 02/01/2023]
Abstract
Drying processes such as spray drying, as commonly used in the pharmaceutical industry to convert protein-based drugs into their particulate form, can lead to an irreversible loss of protein activity caused by protein secondary structure changes. Due to the nature of these processes (high droplet number, short drying time), an in situ investigation of the structural changes occurring during a real drying process is hardly possible. Therefore, an approach for the in situ investigation of the expected secondary structural changes during single droplet protein drying in an acoustic levitator by time-resolved Raman spectroscopy was developed and is demonstrated in this paper. For that purpose, a self-developed NIR–Raman sensor generates and detects the Raman signal from the levitated solution droplet. A mathematical spectral reconstruction by multiple Voigt functions is used to quantify the relative secondary structure changes occurring during the drying process. With the developed setup, it was possible to detect and quantify the relative secondary structure changes occurring during single droplet drying experiments for the two chosen model substances: poly-L-lysine, a homopolypeptide widely used as a protein mimic, and lysozyme. Throughout drying, an increase in the β-sheet structure and a decrease in the other two structural elements, α-helix, and random coil, could be identified. In addition, it was observed that the degree of structural changes increased with increasing temperature.
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17
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Jeong S, Mai HD, Nam KH, Park CM, Jeon KJ. Self-Healing Graphene-Templated Platinum-Nickel Oxide Heterostructures for Overall Water Splitting. ACS Nano 2022; 16:930-938. [PMID: 35029361 DOI: 10.1021/acsnano.1c08506] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Electrocatalysts with dramatically enhanced water splitting efficiency, derived from controlled structures, phase transitions, functional activation, etc., have been developed recently. Herein, we report an in situ observation of graphene-based self-healing, in which this functional activation is induced by a redox reaction. Specifically, graphene on stainless steel (SUS) switches between graphene (C-C) and graphene oxide (C-O) coordination via an electrical redox reaction to activate water splitting. A heterostructure comprising Pt-NiO thin films on single-layer graphene directly grown on a SUS substrate (Pt-NiO/Gr-SUS) was also synthesized by electrodeposition. Pt-NiO/Gr-SUS exhibited water splitting activity with low Pt loading (<1 wt %). The findings provide valuable insight for designing robust electrodes based on reversible redox-induced self-healable graphene to develop more efficient catalysts.
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Affiliation(s)
- Sangmin Jeong
- Department of Environmental Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Hien Duy Mai
- Department of Environmental Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Ki-Hun Nam
- School of Materials Science and Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 39177, Republic of Korea
- Department of Energy Engineering Convergence, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 39177, Republic of Korea
| | - Cheol-Min Park
- School of Materials Science and Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 39177, Republic of Korea
- Department of Energy Engineering Convergence, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 39177, Republic of Korea
| | - Ki-Joon Jeon
- Department of Environmental Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
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18
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Chovnik O, Cohen SR, Pinkas I, Houben L, Gorelik TE, Feldman Y, Shimon LJW, Iron MA, Lahav M, van der Boom ME. Noncovalent Bonding Caught in Action: From Amorphous to Cocrystalline Molecular Thin Films. ACS Nano 2021; 15:14643-14652. [PMID: 34516094 DOI: 10.1021/acsnano.1c04355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We demonstrate the solvent-free amorphous-to-cocrystalline transformations of nanoscale molecular films. Exposing amorphous films to vapors of a haloarene results in the formation of a cocrystalline coating. This transformation proceeds by gradual strengthening of halogen-bonding interactions as a result of the crystallization process. The gas-solid diffusion mechanism involves formation of an amorphous metastable phase prior to crystallization of the films. In situ optical microscopy shows mass transport during this process, which is confirmed by cross-section analysis of the final structures using focused ion beam milling combined with scanning electron microscopy. Nanomechanical measurements show that the rigidity of the amorphous films influences the crystallization process. This surface transformation results in molecular arrangements that are not readily obtained through other means. Cocrystals grown in solution crystallize in a monoclinic centrosymmetric space group, whereas the on-surface halogen-bonded assembly crystallizes into a noncentrosymmetric material with a bulk second-order nonlinear optical response.
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Affiliation(s)
- Olga Chovnik
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Sidney R Cohen
- Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Iddo Pinkas
- Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lothar Houben
- Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Tatiana E Gorelik
- Electron Microscopy Group of Materials Science, Ulm University, Ulm 89081, Germany
| | - Yishay Feldman
- Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Linda J W Shimon
- Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Mark A Iron
- Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Michal Lahav
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Milko E van der Boom
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science, Rehovot 7610001, Israel
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19
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Sourav S, Wang Y, Kiani D, Baltrusaitis J, Fushimi RR, Wachs IE. New Mechanistic and Reaction Pathway Insights for Oxidative Coupling of Methane (OCM) over Supported Na 2 WO 4 /SiO 2 Catalysts. Angew Chem Int Ed Engl 2021; 60:21502-21511. [PMID: 34339591 DOI: 10.1002/anie.202108201] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Indexed: 12/14/2022]
Abstract
The complex structure of the catalytic active phase, and surface-gas reaction networks have hindered understanding of the oxidative coupling of methane (OCM) reaction mechanism by supported Na2 WO4 /SiO2 catalysts. The present study demonstrates, with the aid of in situ Raman spectroscopy and chemical probe (H2 -TPR, TAP and steady-state kinetics) experiments, that the long speculated crystalline Na2 WO4 active phase is unstable and melts under OCM reaction conditions, partially transforming to thermally stable surface Na-WOx sites. Kinetic analysis via temporal analysis of products (TAP) and steady-state OCM reaction studies demonstrate that (i) surface Na-WOx sites are responsible for selectively activating CH4 to C2 Hx and over-oxidizing CHy to CO and (ii) molten Na2 WO4 phase is mainly responsible for over-oxidation of CH4 to CO2 and also assists in oxidative dehydrogenation of C2 H6 to C2 H4 . These new insights reveal the nature of catalytic active sites and resolve the OCM reaction mechanism over supported Na2 WO4 /SiO2 catalysts.
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Affiliation(s)
- Sagar Sourav
- Biological and Chemical Science and Engineering, Energy Environment Science & Technology, Idaho National Laboratory, Idaho Falls, ID, 83415, USA.,Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA, 18015, USA
| | - Yixiao Wang
- Biological and Chemical Science and Engineering, Energy Environment Science & Technology, Idaho National Laboratory, Idaho Falls, ID, 83415, USA
| | - Daniyal Kiani
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA, 18015, USA
| | - Jonas Baltrusaitis
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA, 18015, USA
| | - Rebecca R Fushimi
- Biological and Chemical Science and Engineering, Energy Environment Science & Technology, Idaho National Laboratory, Idaho Falls, ID, 83415, USA
| | - Israel E Wachs
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA, 18015, USA
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20
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Yu B, Huang A, Chen D, Srinivas K, Zhang X, Wang X, Wang B, Ma F, Liu C, Zhang W, He J, Wang Z, Chen Y. In Situ Construction of Mo 2 C Quantum Dots-Decorated CNT Networks as a Multifunctional Electrocatalyst for Advanced Lithium-Sulfur Batteries. Small 2021; 17:e2100460. [PMID: 33891797 DOI: 10.1002/smll.202100460] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/12/2021] [Indexed: 05/28/2023]
Abstract
The slow redox kinetics during cycling process and the serious shuttle effect caused by the solubility of lithium polysulfides (LiPSs) dramatically hinder the practical application of Li-S batteries. Herein, a facile and scalable spray-drying strategy is presented to construct conductive polar Mo2 C quantum dots-decorated carbon nanotube (CNT) networks (MCN) as an efficient absorbent and electrocatalyst for Li-S batteries. The results reveal that the MCN/S electrode exhibits a high specific capacity of 1303.3 mAh g-1 at 0.2 C, and ultrastable cycling stability with decay of 0.019% per cycle even at 1 C. Theoretical simulation uncovers that Mo2 C exhibits much stronger binding energies for S8 and Li2 Sn . The energy barrier for the conversion between Li2 S4 and Li2 S2 decreases from 1.02 to 0.72 eV when hybriding with Mo2 C. Furthermore, in situ discharge/charge-dependent Raman spectroscopy shows that long-chain Li2 S8 configuration is generated via S8 ring opening near the first plateaus at ≈2.36 V versus Li/Li+ and the S6 2- configuration in CNT/S electrode is maintained below the potential of ≈2.30 V versus Li/Li+ , indicating that the shuttle of soluble LiPSs happens during the whole discharge process. This work provides deep insights into the polar nanoarchitecture design and scalable fabrication for advanced Li-S batteries.
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Affiliation(s)
- Bo Yu
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Aijian Huang
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Dongjiang Chen
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Katam Srinivas
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Xiaojuan Zhang
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Xinqiang Wang
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Bin Wang
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Fei Ma
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Chunlin Liu
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Wanli Zhang
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Jiarui He
- Materials Science and Engineering Program & Texas Materials Institute, the University of Texas at Austin, Austin, TX, 78712, USA
| | - Zegao Wang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yuanfu Chen
- School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
- School of Science, and Institute of Oxygen Supply, Tibet University, Lhasa, 850000, P. R. China
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21
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Pan M, Schicks JM. Influence of Gas Supply Changes on the Formation Process of Complex Mixed Gas Hydrates. Molecules 2021; 26:molecules26103039. [PMID: 34069713 PMCID: PMC8160831 DOI: 10.3390/molecules26103039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/13/2021] [Accepted: 05/15/2021] [Indexed: 12/03/2022] Open
Abstract
Natural gas hydrate occurrences contain predominantly methane; however, there are increasing reports of complex mixed gas hydrates and coexisting hydrate phases. Changes in the feed gas composition due to the preferred incorporation of certain components into the hydrate phase and an inadequate gas supply is often assumed to be the cause of coexisting hydrate phases. This could also be the case for the gas hydrate system in Qilian Mountain permafrost (QMP), which is mainly controlled by pores and fractures with complex gas compositions. This study is dedicated to the experimental investigations on the formation process of mixed gas hydrates based on the reservoir conditions in QMP. Hydrates were synthesized from water and a gas mixture under different gas supply conditions to study the effects on the hydrate formation process. In situ Raman spectroscopic measurements and microscopic observations were applied to record changes in both gas and hydrate phase over the whole formation process. The results demonstrated the effects of gas flow on the composition of the resulting hydrate phase, indicating a competitive enclathration of guest molecules into the hydrate lattice depending on their properties. Another observation was that despite significant changes in the gas composition, no coexisting hydrate phases were formed.
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Affiliation(s)
- Mengdi Pan
- GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany;
- Department for Earth and Environmental Sciences, University of Potsdam, 14476 Potsdam, Germany
| | - Judith M. Schicks
- GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany;
- Correspondence:
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22
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Yazdani S, Pondick JV, Kumar A, Yarali M, Woods JM, Hynek DJ, Qiu DY, Cha JJ. Heterointerface Effects on Lithium-Induced Phase Transitions in Intercalated MoS 2. ACS Appl Mater Interfaces 2021; 13:10603-10611. [PMID: 33596044 DOI: 10.1021/acsami.0c21495] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The intercalation-induced phase transition of MoS2 from the semiconducting 2H to the semimetallic 1T' phase has been studied in detail for nearly a decade; however, the effects of a heterointerface between MoS2 and other two-dimensional (2D) crystals on the phase transition have largely been overlooked. Here, ab initio calculations show that intercalating Li at a MoS2-hexagonal boron nitride (hBN) interface stabilizes the 1T phase over the 2H phase of MoS2 by ∼100 mJ m -2, suggesting that encapsulating MoS2 with hBN may lower the electrochemical energy needed for the intercalation-induced phase transition. However, in situ Raman spectroscopy of hBN-MoS2-hBN heterostructures during the electrochemical intercalation of Li+ shows that the phase transition occurs at the same applied voltage for the heterostructure as for bare MoS2. We hypothesize that the predicted thermodynamic stabilization of the 1T'-MoS2-hBN interface is counteracted by an energy barrier to the phase transition imposed by the steric hindrance of the heterointerface. The phase transition occurs at lower applied voltages upon heating the heterostructure, which supports our hypothesis. Our study highlights that interfacial effects of 2D heterostructures can go beyond modulating electrical properties and can modify electrochemical and phase transition behaviors.
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Affiliation(s)
- Sajad Yazdani
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - Joshua V Pondick
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - Aakash Kumar
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - Milad Yarali
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - John M Woods
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - David J Hynek
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - Diana Y Qiu
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
| | - Judy J Cha
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
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23
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Lee C, Yokoyama Y, Kondo Y, Miyahara Y, Abe T, Miyazaki K. Mechanism of the Loss of Capacity of LiNiO 2 Electrodes for Use in Aqueous Li-Ion Batteries: Unveiling a Fundamental Cause of Deterioration in an Aqueous Electrolyte through In Situ Raman Observation. ACS Appl Mater Interfaces 2020; 12:56076-56085. [PMID: 33258580 DOI: 10.1021/acsami.0c18157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study investigated the fundamental mechanisms of the loss of capacity of LiNiO2 (LNO) electrodes for Li+ insertion/deinsertion with a special focus on the origin of this deterioration in an aqueous system. In situ Raman spectra revealed that the intercalation of H+ ions formed a NiOOHx film at the surface of LNO during the initial electrochemical cycles; this NiOOHx film was also confirmed by X-ray photoelectron spectroscopy and transmission electron microscopy analysis. The formation of an electrochemically inactive spinel-like phase (Ni3O4) at the subsurface was triggered by the absence of Li in the NiOOHx film at the surface. These structural changes of LNO, accelerated by the intercalation of H+ ions, were considered to be the fundamental cause of the greater loss of capacity in the aqueous system.
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Affiliation(s)
- Changhee Lee
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuko Yokoyama
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yasuyuki Kondo
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuto Miyahara
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takeshi Abe
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kohei Miyazaki
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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24
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Zhu J, Wei P, Zeng Q, Wang G, Wu K, Ma S, Shen PK, Wu XL. MnS@N,S Co-Doped Carbon Core/Shell Nanocubes: Sulfur-Bridged Bonds Enhanced Na-Storage Properties Revealed by In Situ Raman Spectroscopy and Transmission Electron Microscopy. Small 2020; 16:e2003001. [PMID: 33078568 DOI: 10.1002/smll.202003001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/21/2020] [Indexed: 06/11/2023]
Abstract
Rational structure and morphology design are of great significance to realize excellent Na storage for advanced electrode materials in sodium-ion batteries (SIBs). Herein, a cube-like core/shell composite of single MnS nanocubes (≈50 nm) encapsulated in N, S co-doped carbon (MnS@NSC) with strong CSMn bond interactions is successfully prepared as outstanding anode material for SIBs. The carbon shell significantly restricts the expansion of the MnS volume in successive sodiation/desodiation processes, as demonstrated by in situ transmission electron microscopy (TEM) of one single MnS@NSC nanocube. Moreover, the in situ generated CSMn bonds between the MnS core and carbon shell play a significant role in improving the Na-storage stability and reversibility of MnS@NSC, as revealed by in situ Raman and TEM. As a result, MnS@NSC exhibits a high reversible specific capacity of 594.2 mAh g-1 at a current density of 100 mA g-1 and an excellent rate performance. It also achieves a remarkable cycling stability of 329.1 mAh g-1 after 3000 charge/discharge cycles at 1 A g-1 corresponding to a low capacity attenuation rate of 0.0068% per cycle, which is superior to that of pristine MnS and most of the reported Mn-based anode materials in SIBs.
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Affiliation(s)
- Jinliang Zhu
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, P. R. China
| | - Pengcheng Wei
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, P. R. China
| | - Qingkai Zeng
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, P. R. China
| | - Guifang Wang
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, P. R. China
| | - Kaipeng Wu
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Shaojian Ma
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, P. R. China
| | - Pei Kang Shen
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, P. R. China
| | - Xing-Long Wu
- National & Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, P. R. China
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25
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McCoy VE, Wiemann J, Lamsdell JC, Whalen CD, Lidgard S, Mayer P, Petermann H, Briggs DEG. Chemical signatures of soft tissues distinguish between vertebrates and invertebrates from the Carboniferous Mazon Creek Lagerstätte of Illinois. Geobiology 2020; 18:560-565. [PMID: 32347003 DOI: 10.1111/gbi.12397] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 01/17/2020] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
The chemical composition of fossil soft tissues is a potentially powerful and yet underutilized tool for elucidating the affinity of problematic fossil organisms. In some cases, it has proven difficult to assign a problematic fossil even to the invertebrates or vertebrates (more generally chordates) based on often incompletely preserved morphology alone, and chemical composition may help to resolve such questions. Here, we use in situ Raman microspectroscopy to investigate the chemistry of a diverse array of invertebrate and vertebrate fossils from the Pennsylvanian Mazon Creek Lagerstätte of Illinois, and we generate a ChemoSpace through principal component analysis (PCA) of the in situ Raman spectra. Invertebrate soft tissues characterized by chitin (polysaccharide) fossilization products and vertebrate soft tissues characterized by protein fossilization products plot in completely separate, non-overlapping regions of the ChemoSpace, demonstrating the utility of certain soft tissue molecular signatures as biomarkers for the original soft tissue composition of fossil organisms. The controversial problematicum Tullimonstrum, known as the Tully Monster, groups with the vertebrates, providing strong evidence of a vertebrate rather than invertebrate affinity.
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Affiliation(s)
- Victoria E McCoy
- Department of Geosciences, University of Wisconsin, Milwaukee, Milwaukee, WI, USA
- Institute of Geosciences, University of Bonn, Bonn, Germany
| | - Jasmina Wiemann
- Department of Geology and Geophysics, Yale University, New Haven, CT, USA
| | - James C Lamsdell
- Department of Geology and Geography, West Virginia University, Morgantown, WV, USA
| | | | | | - Paul Mayer
- Field Museum of Natural History, Chicago, IL, USA
| | - Holger Petermann
- Department of Earth Sciences, Denver Museum of Nature and Science, Colorado Boulevard, Denver, CO, USA
| | - Derek E G Briggs
- Department of Geology and Geophysics, Yale University, New Haven, CT, USA
- Yale Peabody Museum of Natural History, New Haven, CT, USA
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26
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Gao J, Meng Y, Benton A, He J, Jacobsohn LG, Tong J, Brinkman KS. Insights into the Proton Transport Mechanism in TiO 2 Simple Oxides by In Situ Raman Spectroscopy. ACS Appl Mater Interfaces 2020; 12:38012-38018. [PMID: 32846475 DOI: 10.1021/acsami.0c08120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Understanding the mechanisms of proton conduction at the interface of materials enables the development of a new generation of protonic ceramic conductors at low temperatures (<150 °C) through water absorption and proton transport on the surface and grain boundaries. Conductivity measurements under Ar-3% H2O and Ar-3% D2O revealed a σ(H2O)/σ(D2O) ratio of approximately 2, indicating a hopping-based mechanism for proton conduction at the interface. In situ Raman spectroscopy was performed on water-saturated, porous, and nanostructured TiO2 membranes to directly observe the isotope exchange reactions over the temperature range of 25 to 175 °C. The behavior of the isotope exchange reactions suggested a Grotthuss-type proton transport and faster isotope exchange reactions at 175 °C than that at 25 °C with a corresponding activation energy of 9 kJ mol-1. The quantitative and mechanistic kinetic description of the isotope exchange process via in situ Raman spectroscopy represents a significant advance toward understanding proton transport mechanisms and aids in the development of high-performance proton conductors with rapid surface exchange coefficients of importance to contemporary energy conversion and storage material development. In addition, new material systems are proposed, which combine interface and bulk effects at low temperatures (<150 °C), resulting in enhanced proton transport through interfacial engineering at the nanoscale.
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Affiliation(s)
- Jun Gao
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Yuqing Meng
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Allen Benton
- Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, United States
| | - Jian He
- Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, United States
| | - Luiz G Jacobsohn
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Center for Nuclear Environment Engineering Sciences and Radioactive Waste Management (NEESRWM), Clemson University, Clemson, South Carolina 29634, United States
| | - Jianhua Tong
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Center for Nuclear Environment Engineering Sciences and Radioactive Waste Management (NEESRWM), Clemson University, Clemson, South Carolina 29634, United States
| | - Kyle S Brinkman
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Center for Nuclear Environment Engineering Sciences and Radioactive Waste Management (NEESRWM), Clemson University, Clemson, South Carolina 29634, United States
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27
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Pezzotti G, Adachi T, Boschetto F, Zhu W, Zanocco M, Marin E, Bal BS, McEntire BJ. Off-Stoichiometric Reactions at the Cell-Substrate Biomolecular Interface of Biomaterials: In Situ and Ex Situ Monitoring of Cell Proliferation, Differentiation, and Bone Tissue Formation. Int J Mol Sci 2019; 20:E4080. [PMID: 31438530 PMCID: PMC6751500 DOI: 10.3390/ijms20174080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/15/2019] [Accepted: 08/17/2019] [Indexed: 11/18/2022] Open
Abstract
The availability of osteoinductive biomaterials has encouraged new therapies in bone regeneration and has potentially triggered paradigmatic shifts in the development of new implants in orthopedics and dentistry. Among several available synthetic biomaterials, bioceramics have gained attention for their ability to induce mesenchymal cell differentiation and successive bone formation when implanted in the human body. However, there is currently a lack of understanding regarding the fundamental biochemical mechanisms by which these materials can induce bone formation. Phenomenological studies of retrievals have clarified the final effect of bone formation, but have left the chemical interactions at the cell-material interface uncharted. Accordingly, the knowledge of the intrinsic material properties relevant for osteoblastogenesis and osteoinduction remains incomplete. Here, we systematically monitored in vitro the chemistry of mesenchymal cell metabolism and the ionic exchanges during osteoblastogenesis on selected substrates through conventional biological assays as well as via in situ and ex situ spectroscopic techniques. Accordingly, the chemical behavior of different bioceramic substrates during their interactions with mesenchymal cells could be unfolded and compared with that of biomedical titanium alloy. Our goal was to clarify the cascade of chemical equations behind the biological processes that govern osteoblastogenic effects on different biomaterial substrates.
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Affiliation(s)
- Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan.
- Department of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.
- The Center for Advanced Medical Engineering and Informatics, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0854, Japan.
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan.
| | - Tetsuya Adachi
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Francesco Boschetto
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
| | - Wenliang Zhu
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
| | - Matteo Zanocco
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 465 Kajii-cho, Kyoto 602-8566, Japan
| | - Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - B Sonny Bal
- SINTX Technologies Corporation, 1885 West 2100 South, Salt Lake City, UT 84119, USA
| | - Bryan J McEntire
- SINTX Technologies Corporation, 1885 West 2100 South, Salt Lake City, UT 84119, USA
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Ejigu A, Le Fevre LW, Fujisawa K, Terrones M, Forsyth AJ, Dryfe RAW. Electrochemically Exfoliated Graphene Electrode for High-Performance Rechargeable Chloroaluminate and Dual-Ion Batteries. ACS Appl Mater Interfaces 2019; 11:23261-23270. [PMID: 31252480 DOI: 10.1021/acsami.9b06528] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The current state-of-the-art positive electrode material for chloroaluminate ion batteries (AIBs) or dual-ion batteries (DIBs) is highly crystalline graphite; however, the rate capability of this material at high discharge currents is significantly reduced by the modest conductivity of graphite. This limitation is addressed through the use of graphene-based positive electrodes, which can improve the rate capability of these batteries due to their higher conductivity. However, conventional methods of graphene production induce a significant number of defects, which impair the performance of AIBs and DIBs. Herein, we report the use of a defect-free graphene positive electrode, which was produced using the electrochemical exfoliation of graphite in an aqueous solution with the aid of Co2+ as an antioxidant. The Co-treated graphene electrode achieved high capacities of 150 mAh g-1 in DIBs and 130 mAh g-1 in AIBs with high rate capability for both batteries. The charge-discharge mechanism of the batteries is examined using in situ Raman spectroscopy, and the results revealed that the intercalation density of [AlCl4]- or [PF6]- increased from a dilute staging index graphite intercalation compound (GIC) to a stage 1 GIC within the operating voltage window. The simple production method of high-quality graphene in conjunction with its high performance in DIBs should enable the use of graphene for DIB technologies.
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Affiliation(s)
| | | | - Kazunori Fujisawa
- Department of Physics, Center for Two-Dimensional and Layered Materials and Center for Atomically Thin Multifunctional Coatings (ATOMIC) , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - Mauricio Terrones
- Department of Physics, Center for Two-Dimensional and Layered Materials and Center for Atomically Thin Multifunctional Coatings (ATOMIC) , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
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Park Y, Kim SM, Jin S, Lee SM, Noda I, Jung YM. Investigation of the Phase Transition Mechanism in LiFePO₄ Cathode Using In Situ Raman Spectroscopy and 2D Correlation Spectroscopy during Initial Cycle. Molecules 2019; 24:E291. [PMID: 30646621 PMCID: PMC6359707 DOI: 10.3390/molecules24020291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 12/27/2018] [Accepted: 01/08/2019] [Indexed: 11/17/2022] Open
Abstract
The phase transition of the LiFePO₄ and FePO₄ in Li-ion cell during charging-discharging processes in the first and second cycles is elucidated by Raman spectroscopy in real time. In situ Raman spectroscopy showed the sudden phase transition between LiFePO₄ and FePO₄. Principal component analysis (PCA) results also indicated that the structural changes and electrochemical performance (charge-discharge curve) are correlated with each other. Phase transition between LiFePO₄ and FePO₄ principally appeared in the second charging process compared with that in the first charging process. 2D correlation spectra provided the phase transition mechanism of LiFePO₄ cathode which occurred during the charging-discharging processes in the first and second cycles. PCA and 2D correlation spectroscopy are very helpful methods to understand in situ Raman spectra for the Li-ion battery.
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Affiliation(s)
- Yeonju Park
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea.
| | - Soo Min Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea.
| | - Sila Jin
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea.
| | - Sung Man Lee
- Department of Nano Applied Engineering, Kangwon National University, Chuncheon 24341, Korea.
| | - Isao Noda
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA.
| | - Young Mee Jung
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea.
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30
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Kluender EJ, Hedrick JL, Brown KA, Rao R, Meckes B, Du JS, Moreau LM, Maruyama B, Mirkin CA. Catalyst discovery through megalibraries of nanomaterials. Proc Natl Acad Sci U S A 2019; 116:40-5. [PMID: 30559201 DOI: 10.1073/pnas.1815358116] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The nanomaterial landscape is so vast that a high-throughput combinatorial approach is required to understand structure-function relationships. To address this challenge, an approach for the synthesis and screening of megalibraries of unique nanoscale features (>10,000,000) with tailorable location, size, and composition has been developed. Polymer pen lithography, a parallel lithographic technique, is combined with an ink spray-coating method to create pen arrays, where each pen has a different but deliberately chosen quantity and composition of ink. With this technique, gradients of Au-Cu bimetallic nanoparticles have been synthesized and then screened for activity by in situ Raman spectroscopy with respect to single-walled carbon nanotube (SWNT) growth. Au3Cu, a composition not previously known to catalyze SWNT growth, has been identified as the most active composition.
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31
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Zhu C, Chen Y, Liu F, Zheng S, Li X, Chaturvedi A, Zhou J, Fu Q, He Y, Zeng Q, Fan HJ, Zhang H, Liu WJ, Yu T, Liu Z. Light-Tunable 1T-TaS 2 Charge-Density-Wave Oscillators. ACS Nano 2018; 12:11203-11210. [PMID: 30299925 DOI: 10.1021/acsnano.8b05756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
External stimuli-controlled phase transitions are essential for fundamental physics and design of functional devices. Charge density wave (CDW) is a metastable collective electronic phase featured by the periodic lattice distortion. Much attention has been attracted to study the external control of CDW phases. Although much work has been done in the electric-field-induced CDW transition, the study of the role of Joule heating in the phase transition is insufficient. Here, using the Raman spectroscopy, the electric-field-driven phase transition is in situ observed in the ultrathin 1T-TaS2. By quantitative evaluation of the Joule heating effect in the electric-field-induced CDW transition, it is shown that Joule heating plays a secondary role in the nearly commensurate (NC) to incommensurate (IC) CDW transition, while it dominants the IC-NC CDW transition, providing a better understanding of the electric field-induced phase transition. More importantly, at room temperature, light illumination can modulate the CDW phase and thus tune the frequency of the ultrathin 1T-TaS2 oscillators. This light tunability of the CDW phase transition is promising for multifunctional device applications.
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Affiliation(s)
- Chao Zhu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Yu Chen
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Fucai Liu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
- School of Optoelectronic Science and Engineering , University of Electronic Science and Technology of China , Chengdu 610054 , China
| | - Shoujun Zheng
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Xiaobao Li
- School of Civil Engineering , Hefei University of Technology , Hefei 230009 , China
| | - Apoorva Chaturvedi
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Jiadong Zhou
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Qundong Fu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Yongmin He
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Qingsheng Zeng
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Hong Jin Fan
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Hua Zhang
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Wen-Jun Liu
- State Key Laboratory of ASIC and System, School of Microelectronics , Fudan University , Shanghai 200433 , China
| | - Ting Yu
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Zheng Liu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
- NOVITAS, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering , Nanyang Technological University , Singapore 639798 , Singapore
- CINTRA CNRS/NTU/THALES , UMI 3288, Research Techno Plaza , Singapore 637553 , Singapore
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32
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Li X, Qiao Y, Guo S, Xu Z, Zhu H, Zhang X, Yuan Y, He P, Ishida M, Zhou H. Direct Visualization of the Reversible O 2- /O - Redox Process in Li-Rich Cathode Materials. Adv Mater 2018; 30:e1705197. [PMID: 29457283 DOI: 10.1002/adma.201705197] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 01/05/2018] [Indexed: 06/08/2023]
Abstract
Conventional cathodes of Li-ion batteries mainly operate through an insertion-extraction process involving transition metal redox. These cathodes will not be able to meet the increasing requirements until lithium-rich layered oxides emerge with beyond-capacity performance. Nevertheless, in-depth understanding of the evolution of crystal and excess capacity delivered by Li-rich layered oxides is insufficient. Herein, various in situ technologies such as X-ray diffraction and Raman spectroscopy are employed for a typical material Li1.2 Ni0.2 Mn0.6 O2 , directly visualizing O- O- (peroxo oxygen dimers) bonding mostly along the c-axis and demonstrating the reversible O2- /O- redox process. Additionally, the formation of the peroxo OO bond is calculated via density functional theory, and the corresponding OO bond length of ≈1.3 Å matches well with the in situ Raman results. These findings enrich the oxygen chemistry in layered oxides and open opportunities to design high-performance positive electrodes for lithium-ion batteries.
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Affiliation(s)
- Xiang Li
- Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
- Graduate School of System and Information Engineering, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan
- Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
| | - Yu Qiao
- Graduate School of System and Information Engineering, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan
| | - Shaohua Guo
- Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
- Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
| | - Zhenming Xu
- University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hong Zhu
- University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaoyu Zhang
- Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
| | - Yang Yuan
- Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
| | - Ping He
- Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
| | - Masayoshi Ishida
- Graduate School of System and Information Engineering, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan
| | - Haoshen Zhou
- Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
- Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan
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33
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Li MY, Ebel B, Paris C, Chauchard F, Guedon E, Marc A. Real-time monitoring of antibody glycosylation site occupancy by in situ Raman spectroscopy during bioreactor CHO cell cultures. Biotechnol Prog 2018; 34:486-493. [PMID: 29314747 DOI: 10.1002/btpr.2604] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/14/2017] [Indexed: 12/12/2022]
Abstract
The glycosylation of therapeutic monoclonal antibodies (mAbs), a known critical quality attribute, is often greatly modified during the production process by animal cells. It is essential for biopharmaceutical industries to monitor and control this glycosylation. However, current glycosylation characterization techniques involve time- and labor-intensive analyses, often carried out at the end of the culture when the product is already synthesized. This study proposes a novel methodology for real-time monitoring of antibody glycosylation site occupancy using Raman spectroscopy. It was first observed in CHO cell batch culture that when low nutrient concentrations were reached, a decrease in mAb glycosylation was induced, which made it essential to rapidly detect this loss of product quality. By combining in situ Raman spectroscopy with chemometric tools, efficient prediction models were then developed for both glycosylated and nonglycosylated mAbs. By comparing variable importance in projection profiles of the prediction models, it was confirmed that Raman spectroscopy is a powerful method to distinguish extremely similar molecules, despite the high complexity of the culture medium. Finally, the Raman prediction models were used to monitor batch and feed-harvest cultures in situ. For the first time, it was demonstrated that the concentrations of glycosylated and nonglycosylated mAbs could be successfully and simultaneously estimated in real time with high accuracy, including their sudden variations due to medium exchanges. Raman spectroscopy can thus be considered as a promising PAT tool for feedback process control dedicated to on-line optimization of mAb quality. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:486-493, 2018.
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Affiliation(s)
- Meng-Yao Li
- Laboratoire Réactions et Génie des Procédés, CNRS-Lorraine University, UMR 7274, Vandœuvre-lès-Nancy, France
| | - Bruno Ebel
- Laboratoire Réactions et Génie des Procédés, CNRS-Lorraine University, UMR 7274, Vandœuvre-lès-Nancy, France
| | - Cédric Paris
- Platform of Structural and Metabolomics Analyses, SF4242, EFABA, Lorraine University, Vandœuvre-lès-Nancy, France
| | | | - Emmanuel Guedon
- Laboratoire Réactions et Génie des Procédés, CNRS-Lorraine University, UMR 7274, Vandœuvre-lès-Nancy, France
| | - Annie Marc
- Laboratoire Réactions et Génie des Procédés, CNRS-Lorraine University, UMR 7274, Vandœuvre-lès-Nancy, France
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Solonenko D, Gordan OD, Le Lay G, Zahn DRT, Vogt P. Comprehensive Raman study of epitaxial silicene-related phases on Ag(111). Beilstein J Nanotechnol 2017; 8:1357-1365. [PMID: 28900591 PMCID: PMC5530609 DOI: 10.3762/bjnano.8.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 06/07/2017] [Indexed: 05/30/2023]
Abstract
The investigation of the vibrational properties of epitaxial silicene and two-dimensional (2D) Si structures on the silver(111) surface aims for a better understanding of the structural differences and of the simplification of the seemingly complex phase diagrams reported over the last years. The spectral signatures of the main silicene phases epitaxially grown on Ag(111) were obtained using in situ Raman spectroscopy. Due to the obvious 2D nature of various epitaxial silicene structures, their fingerprints consist of similar sets of Raman modes. The reduced phase diagram also includes other Si phases, such as amorphous and crystalline silicon, which emerge on the Ag surface at low and high preparation temperatures, respectively. The Raman signatures obtained along with their interpretations provide the referential basis for further studies and for potential applications of epitaxial silicene.
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Affiliation(s)
- Dmytro Solonenko
- Semiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Ovidiu D Gordan
- Semiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Guy Le Lay
- Aix-Marseille Université, CNRS, 13397 Marseille Cedex, France
| | - Dietrich R T Zahn
- Semiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Patrick Vogt
- Semiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany
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35
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Hu M, Li Z, Hu T, Zhu S, Zhang C, Wang X. High-Capacitance Mechanism for Ti 3C 2T x MXene by in Situ Electrochemical Raman Spectroscopy Investigation. ACS Nano 2016; 10:11344-11350. [PMID: 28024328 DOI: 10.1021/acsnano.6b06597] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
MXenes represent an emerging family of conductive two-dimensional materials. Their representative, Ti3C2Tx, has been recognized as an outstanding member in the field of electrochemical energy storage. However, an in-depth understanding of fundamental processes responsible for the superior capacitance of Ti3C2Tx MXene in acidic electrolytes is lacking. Here, to understand the mechanism of capacitance in Ti3C2Tx MXene, we studied electrochemically the charge/discharge processes of Ti3C2Tx electrodes in sulfate ion-containing aqueous electrolytes with three different cations, coupled with in situ Raman spectroscopy. It is demonstrated that hydronium in the H2SO4 electrolyte bonds with the terminal O in the negative electrode upon discharging while debonding occurs upon charging. Correspondingly, the reversible bonding/debonding changes the valence state of Ti element in the MXene, giving rise to the pseudocapacitance in the acidic electrolyte. In stark contrast, only electric double layer capacitance is recognized in the other electrolytes of (NH4)2SO4 or MgSO4. The charge storage ways also differ: ion exchange dominates in H2SO4, while counterion adsorption in the rest. Hydronium that is characterized by smaller hydration radius and less charge is the most mobile among the three cations, facilitating it more kinetically accommodated on the deep adsorption sites between the MXene layers. The two key factors, i.e., surface functional group-involved bonding/debonding-induced pseudocapacitance, and ion exchange-featured charge storage, simultaneously contribute to the superior capacitance of Ti3C2Tx MXene in acidic electrolytes.
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Affiliation(s)
- Minmin Hu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China , Hefei 230026, China
| | - Zhaojin Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Tao Hu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Shihao Zhu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Chao Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
| | - Xiaohui Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
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See KA, Wu HL, Lau KC, Shin M, Cheng L, Balasubramanian M, Gallagher KG, Curtiss LA, Gewirth AA. Effect of Hydrofluoroether Cosolvent Addition on Li Solvation in Acetonitrile-Based Solvate Electrolytes and Its Influence on S Reduction in a Li-S Battery. ACS Appl Mater Interfaces 2016; 8:34360-34371. [PMID: 27998132 DOI: 10.1021/acsami.6b11358] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Li-S batteries are a promising next-generation battery technology. Due to the formation of soluble polysulfides during cell operation, the electrolyte composition of the cell plays an active role in directing the formation and speciation of the soluble lithium polysulfides. Recently, new classes of electrolytes termed "solvates" that contain stoichiometric quantities of salt and solvent and form a liquid at room temperature have been explored due to their sparingly solvating properties with respect to polysulfides. The viscosity of the solvate electrolytes is understandably high limiting their viability; however, hydrofluoroether cosolvents, thought to be inert to the solvate structure itself, can be introduced to reduce viscosity and enhance diffusion. Nazar and co-workers previously reported that addition of 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether (TTE) to the LiTFSI in acetonitrile solvate, (MeCN)2-LiTFSI, results in enhanced capacity retention compared to the neat solvate. Here, we evaluate the effect of TTE addition on both the electrochemical behavior of the Li-S cell and the solvation structure of the (MeCN)2-LiTFSI electrolyte. Contrary to previous suggestions, Raman and NMR spectroscopy coupled with ab initio molecular dynamics simulations show that TTE coordinates to Li+ at the expense of MeCN coordination, thereby producing a higher content of free MeCN, a good polysulfide solvent, in the electrolyte. The electrolytes containing a higher free MeCN content facilitate faster polysulfide formation kinetics during the electrochemical reduction of S in a Li-S cell likely as a result of the solvation power of the free MeCN.
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Affiliation(s)
- Kimberly A See
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Heng-Liang Wu
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Kah Chun Lau
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Department of Physics and Astronomy, California State University , Northridge, California 91330, United States
| | - Minjeong Shin
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Lei Cheng
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Mahalingam Balasubramanian
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Kevin G Gallagher
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Larry A Curtiss
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Andrew A Gewirth
- Joint Center for Energy Storage Research , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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Ghosh A, Manjunatha R, Kumar R, Mitra S. A Facile Bottom-Up Approach to Construct Hybrid Flexible Cathode Scaffold for High-Performance Lithium-Sulfur Batteries. ACS Appl Mater Interfaces 2016; 8:33775-33785. [PMID: 27960357 DOI: 10.1021/acsami.6b11180] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lithium-sulfur batteries mostly suffer from the low utilization of sulfur, poor cycle life, and low rate performances. The prime factors that affect the performance are enormous volume change of the electrode, soluble intermediate product formation, poor electronic and ionic conductivity of S, and end discharge products (i.e., Li2S2 and Li2S). The attractive way to mitigate these challenges underlying in the fabrication of a sulfur nanocomposite electrode consisting of different nanoparticles with distinct properties of lithium storage capability, mechanical reinforcement, and ionic as well as electronic conductivity leading to a mechanically robust and mixed conductive (ionic and electronic conductive) sulfur electrode. Herein, we report a novel bottom-up approach to synthesize a unique freestanding, flexible cathode scaffold made of porous reduced graphene oxide, nanosized sulfur, and Mn3O4 nanoparticles, and all are three-dimensionally interconnected to each other by hybrid polyaniline/sodium alginate (PANI-SA) matrix to serve individual purposes. A capacity of 1098 mAh g-1 is achieved against lithium after 200 cycles at a current rate of 2 A g-1 with 97.6% of initial capacity at a same current rate, suggesting the extreme stability and cycling performance of such electrode. Interestingly, with the higher current density of 5 A g-1, the composite electrode exhibited an initial capacity of 1015 mA h g-1 and retained 71% of the original capacity after 500 cycles. The in situ Raman study confirms the polysulfide absorption capability of Mn3O4. This work provides a new strategy to design a mechanically robust, mixed conductive nanocomposite electrode for high-performance lithium-sulfur batteries and a strategy that can be used to develop flexible large power storage devices.
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Affiliation(s)
- Arnab Ghosh
- Electrochemical Energy Laboratory, Department of Energy Science and Engineering, Indian Institute of Technology Bombay , Mumbai 400076, India
| | - Revanasiddappa Manjunatha
- Department of Inorganic and Physical Chemistry, Indian Institute of Science , Bangalore 560012, India
| | - Rajat Kumar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science , Bangalore 560012, India
| | - Sagar Mitra
- Electrochemical Energy Laboratory, Department of Energy Science and Engineering, Indian Institute of Technology Bombay , Mumbai 400076, India
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Share K, Cohn AP, Carter R, Rogers B, Pint CL. Role of Nitrogen-Doped Graphene for Improved High-Capacity Potassium Ion Battery Anodes. ACS Nano 2016; 10:9738-9744. [PMID: 27718549 DOI: 10.1021/acsnano.6b05998] [Citation(s) in RCA: 226] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Potassium is an earth abundant alternative to lithium for rechargeable batteries, but a critical limitation in potassium ion battery anodes is the low capacity of KC8 graphite intercalation compounds in comparison to conventional LiC6. Here we demonstrate that nitrogen doping of few-layered graphene can increase the storage capacity of potassium from a theoretical maximum of 278 mAh/g in graphite to over 350 mAh/g, competitive with anode capacity in commercial lithium ion batteries and the highest reported anode capacity so far for potassium ion batteries. Control studies distinguish the importance of nitrogen dopant sites as opposed to sp3 carbon defect sites to achieve the improved performance, which also enables >6× increase in rate performance of doped vs undoped materials. Finally, in situ Raman spectroscopy studies elucidate the staging sequence for doped and undoped materials and demonstrate the mechanism of the observed capacity enhancement to be correlated with distributed storage at local nitrogen sites in a staged KC8 compound. This study demonstrates a pathway to overcome the limitations of graphitic carbons for anodes in potassium ion batteries by atomically precise engineering of nanomaterials.
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Affiliation(s)
- Keith Share
- Interdisciplinary Materials Science Program, ‡Department of Mechanical Engineering, and §Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Adam P Cohn
- Interdisciplinary Materials Science Program, ‡Department of Mechanical Engineering, and §Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Rachel Carter
- Interdisciplinary Materials Science Program, ‡Department of Mechanical Engineering, and §Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Bridget Rogers
- Interdisciplinary Materials Science Program, ‡Department of Mechanical Engineering, and §Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Cary L Pint
- Interdisciplinary Materials Science Program, ‡Department of Mechanical Engineering, and §Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States
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Cohn AP, Share K, Carter R, Oakes L, Pint CL. Ultrafast Solvent-Assisted Sodium Ion Intercalation into Highly Crystalline Few-Layered Graphene. Nano Lett 2016; 16:543-8. [PMID: 26618985 DOI: 10.1021/acs.nanolett.5b04187] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A maximum sodium capacity of ∼35 mAh/g has hampered the use of crystalline carbon nanostructures for sodium ion battery anodes. We demonstrate that a diglyme solvent shell encapsulating a sodium ion acts as a "nonstick" coating to facilitate rapid ion insertion into crystalline few-layer graphene and bypass slow desolvation kinetics. This yields storage capacities above 150 mAh/g, cycling performance with negligible capacity fade over 8000 cycles, and ∼100 mAh/g capacities maintained at currents of 30 A/g (∼12 s charge). Raman spectroscopy elucidates the ordered, but nondestructive cointercalation mechanism that differs from desolvated ion intercalation processes. In situ Raman measurements identify the Na(+) staging sequence and isolates Fermi energies for the first and second stage ternary intercalation compounds at ∼0.8 eV and ∼1.2 eV.
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Affiliation(s)
- Adam P Cohn
- Department of Mechanical Engineering and ‡Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Keith Share
- Department of Mechanical Engineering and ‡Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Rachel Carter
- Department of Mechanical Engineering and ‡Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Landon Oakes
- Department of Mechanical Engineering and ‡Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Cary L Pint
- Department of Mechanical Engineering and ‡Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
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