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Yang Y, Li J, Xiao Z, Yun Y, Zhu M, Yang J. Space-confined manganese oxides nanosheets for efficient catalytic decomposition of ozone. CHEMOSPHERE 2024; 358:142113. [PMID: 38657694 DOI: 10.1016/j.chemosphere.2024.142113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/09/2024] [Accepted: 04/21/2024] [Indexed: 04/26/2024]
Abstract
Ground-level ozone has long posed a substantial menace to human well-being and the ecological milieu. The widely reported manganese-based catalysts for ozone decomposition still facing the persisting issues encompass inefficiency and instability. To surmount these challenges, we developed a mesoporous silica thin films with perpendicular nanochannels (SBA(⊥)) confined Mn3O4 catalyst (Mn3O4@SBA(⊥)). Under a weight hourly space velocity (WHSV) of 500,000 mL g-1 h-1, the Mn3O4@SBA(⊥) catalyst exhibited 100% ozone decomposition efficiency in 5 h and stability across a wide humidity range, which exceed the performance of bulk Mn3O4 and Mn3O4 confine in commonly reported SBA-15. Rapidly decompose 20 ppm O3 to a safety level below 100 μg m-3 in the presence of dust in smog chamber (60 × 60 × 60 cm) was also realized. This prominent catalytic performance can be attributed to the unique confined structure engenders the highly exposed active sites, facilitate the reactant-active sites contact and impeded the water accumulation on the active sites. This work offers new insights into the design of confined structure catalysts for air purification.
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Affiliation(s)
- Yunjun Yang
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou, 511443, PR China
| | - Jialin Li
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou, 511443, PR China
| | - Zhijian Xiao
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou, 511443, PR China
| | - Yang Yun
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi, 030006, PR China.
| | - Mingshan Zhu
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou, 511443, PR China
| | - Jingling Yang
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou, 511443, PR China.
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2
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Zhou Y, Wu Y, Luo Z, Ling L, Xi M, Li J, Hu L, Wang C, Gu W, Zhu C. Regulating Reactive Oxygen Species over M-N-C Single-Atom Catalysts for Potential-Resolved Electrochemiluminescence. J Am Chem Soc 2024; 146:12197-12205. [PMID: 38629507 DOI: 10.1021/jacs.4c02986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The development of potential-resolved electrochemiluminescence (ECL) systems with dual emitting signals holds great promise for accurate and reliable determination in complex samples. However, the practical application of such systems is hindered by the inevitable mutual interaction and mismatch between different luminophores or coreactants. In this work, for the first time, by precisely tuning the oxygen reduction performance of M-N-C single-atom catalysts (SACs), we present a dual potential-resolved luminol ECL system employing endogenous dissolved O2 as a coreactant. Using advanced in situ monitoring and theoretical calculations, we elucidate the intricate mechanism involving the selective and efficient activation of dissolved O2 through central metal species modulation. This modulation leads to the controlled generation of hydroxyl radical (·OH) and superoxide radical (O2·-), which subsequently trigger cathodic and anodic luminol ECL emission, respectively. The well-designed Cu-N-C SACs, with their moderate oxophilicity, enable the simultaneous generation of ·OH and O2·-, thereby facilitating dual potential-resolved ECL. As a proof of concept, we employed the principal component analysis statistical method to differentiate antibiotics based on the output of the dual-potential ECL signals. This work establishes a new avenue for constructing a potential-resolved ECL platform based on a single luminophore and coreactant through precise regulation of active intermediates.
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Affiliation(s)
- Yan Zhou
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yu Wu
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Zhen Luo
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Ling Ling
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Mengzhen Xi
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Jingshuai Li
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Liuyong Hu
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, Wuhan Institute of Technology, Wuhan 430205, P. R. China
| | - Canglong Wang
- Institute of Modern Physics, University of Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Wenling Gu
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Chengzhou Zhu
- State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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3
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Wang A, Zhang L, Guan J, Wang X, Ma G, Fan G, Wang H, Han N, Chen Y. Highly efficient ozone elimination by metal doped ultra-fine Cu 2O nanoparticles. J Environ Sci (China) 2023; 134:108-116. [PMID: 37673525 DOI: 10.1016/j.jes.2022.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 06/05/2022] [Accepted: 06/07/2022] [Indexed: 09/08/2023]
Abstract
Nowadays, ozone contamination becomes dominant in air and thus challenges the research and development of cost-effective catalyst. In this study, metal doped Cu2O catalysts are synthesized via reduction of Cu2+ by ascorbic acid in base solutions containing doping metal ions. The results show that compared with pure Cu2O, the Mg2+ and Fe2+ dopants enhance the O3 removal efficiency while Ni2+ depresses the activity. In specific, Mg-Cu2O shows high O3 removal efficiency of 88.4% in harsh environment of 600,000 mL/(g·hr) space velocity and 1500 ppmV O3, which is one of the highest in the literature. Photoluminescence and electron paramagnetic spectroscopy characterization shows higher concentration of crystal defects induced by the Mg2+ dopants, favoring the O3 degradation. The in-situ diffuse reflectance Fourier transform infrared spectroscopy shows the intermediate species in the O3 degradation process change from O22- dominant of pure Cu2O to O2- dominant of Mg-Cu2O, which would contribute to the high activity. All these results show the promising prospect of the Mg-Cu2O for highly efficiency O3 removal.
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Affiliation(s)
- Anqi Wang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Le Zhang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Jian Guan
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaoze Wang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Guojun Ma
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Guijun Fan
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Hang Wang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Ning Han
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Yunfa Chen
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Science & Technology on Particle Materials, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
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4
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Sharma R, Morgen P, Larsen MJ, Roda-Serrat MC, Lund PB, Grahl-Madsen L, Andersen SM. Recovery, Regeneration, and Reapplication of PFSA Polymer from End-of-Life PEMFC MEAs. ACS APPLIED MATERIALS & INTERFACES 2023; 15:48705-48715. [PMID: 37787495 DOI: 10.1021/acsami.3c11186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
We have developed a recovery, regeneration, and reapplication process for Nafion, a perfluorinated sulfonic acid (PFSA) ionomer, from end-of-life (EoL) low-temperature proton-exchange membrane (PEM) fuel cells (FCs). Samples of PFSA PEM recovered from EoL membrane-electrode assemblies (MEAs) with a history of close to 19,000 h of operation were recycled by dissolving the polymeric material in ethanol and applying the dissolved PFSA ionomer for producing the ionomer phase of the catalyst layer of new PEMFC cathodes. Structural characterizations show a marginally lower abundance of sulfonic groups for the EoL PEM compared to a fresh sample. Sulfonation of the former was employed to regenerate sulfonic groups to compensate for the lost ones. New gas-diffusion electrodes (GDEs) were prepared with the recycled PFSA ionomer both with and without sulfonation, and MEAs with these GDEs as cathodes were assembled through a state-of-the-art procedure. Electrochemical characterizations of the GDEs and single-cell studies of the MEAs showed that the electrochemical performances of catalyst layers containing recycled PFSA ionomer were at least similar to those containing fresh. Durability studies of the GDEs and MEAs, performed through a three-electrode liquid cell and a single cell, respectively, show the highest durability for the GDE/MEA with PFSA ionomer recycled without applying the sulfonation step. However, the GDE with PFSA ionomer obtained from recycling a re-sulfonated PEM shows a durability comparable to that of the GDE with fresh PFSA ionomer. Hence, PFSA material aged during PEMFC operation may be employed to produce highly functional and durable regenerated PFSA ionomer for PEMFC catalyst layers. The studied process of PFSA ionomer recycling is highly attractive for industrial adoption.
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Affiliation(s)
- Raghunandan Sharma
- Department of Green Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Per Morgen
- Department of Green Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Mikkel Juul Larsen
- IRD Fuel Cells A/S, Emil Neckelmanns Vej 15 A&B, 5220 Odense SØ, Denmark
| | - Maria Cinta Roda-Serrat
- Department of Green Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Peter Brilner Lund
- Department of Green Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
- IRD Fuel Cells A/S, Emil Neckelmanns Vej 15 A&B, 5220 Odense SØ, Denmark
| | - Laila Grahl-Madsen
- IRD Fuel Cells A/S, Emil Neckelmanns Vej 15 A&B, 5220 Odense SØ, Denmark
| | - Shuang Ma Andersen
- Department of Green Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
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5
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Zhao W, Xu G, Dong W, Zhang Y, Zhao Z, Qiu L, Dong J. Progress and Perspective for In Situ Studies of Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cells. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2300550. [PMID: 37097627 DOI: 10.1002/advs.202300550] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/21/2023] [Indexed: 06/15/2023]
Abstract
Proton exchange membrane fuel cell (PEMFC) is one of the most promising energy conversion devices with high efficiency and zero emission. However, oxygen reduction reaction (ORR) at the cathode is still the dominant limiting factor for the practical development of PEMFC due to its sluggish kinetics and the vulnerability of ORR catalysts under harsh operating conditions. Thus, the development of high-performance ORR catalysts is essential and requires a better understanding of the underlying ORR mechanism and the failure mechanisms of ORR catalysts with in situ characterization techniques. This review starts with the introduction of in situ techniques that have been used in the research of the ORR processes, including the principle of the techniques, the design of the in situ cells, and the application of the techniques. Then the in situ studies of the ORR mechanism as well as the failure mechanisms of ORR catalysts in terms of Pt nanoparticle degradation, Pt oxidation, and poisoning by air contaminants are elaborated. Furthermore, the development of high-performance ORR catalysts with high activity, anti-oxidation ability, and toxic-resistance guided by the aforementioned mechanisms and other in situ studies are outlined. Finally, the prospects and challenges for in situ studies of ORR in the future are proposed.
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Affiliation(s)
- Wenhui Zhao
- Sinopec Research Institute of Petroleum Processing Co., Ltd. , Beijing, 100083, P. R. China
| | - Guangtong Xu
- Sinopec Research Institute of Petroleum Processing Co., Ltd. , Beijing, 100083, P. R. China
| | - Wenyan Dong
- Sinopec Research Institute of Petroleum Processing Co., Ltd. , Beijing, 100083, P. R. China
| | - Yiwei Zhang
- Sinopec Research Institute of Petroleum Processing Co., Ltd. , Beijing, 100083, P. R. China
| | - Zipeng Zhao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Limei Qiu
- Sinopec Research Institute of Petroleum Processing Co., Ltd. , Beijing, 100083, P. R. China
| | - Juncai Dong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China
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6
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Wen Z, Wu D, Banham D, Chen M, Sun F, Zhao Z, Jin Y, Fan L, Xu S, Gu M, Fan J, Li H. Micromodification of the Catalyst Layer by CO to Increase Pt Utilization for Proton-Exchange Membrane Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:903-913. [PMID: 36542539 DOI: 10.1021/acsami.2c16524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Improving the utilization of platinum in proton-exchange membrane (PEM) fuel cells is critical to reducing their cost. In the past decade, numerous Pt-based oxygen reduction reaction catalysts with high specific and mass activities have been developed. However, the high activities are mostly achieved in rotating disk electrode (RDE) measurement and have rarely been accomplished at the membrane electrode assembly (MEA) level. The failure of these direct translations from RDE to MEA has been well documented with several key reasons having been previously identified. One of them is the resistance caused by complex mass transport pathways in the MEA. Herein, we improve the proton and oxygen transportations in the MEA by building a thin and uniform distribution of ionomer on the catalyst surface. As a result, a PEM fuel cell design is capable of showing a current density improvement of 38% at the same voltage (0.6 V) under the H2/air operation.
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Affiliation(s)
- Zengyin Wen
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Duojie Wu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Dustin Banham
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan528000, China
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan528000, China
- Guangdong TaiJi Power, No. 25 Xingliang Road, Hecheng Street, Foshan528000, China
| | - Ming Chen
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Fengman Sun
- Harbin Institute of Technology, Harbin150001, China
| | - Zhiliang Zhao
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Yiqi Jin
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Li Fan
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Shaoyi Xu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen518055, Guangdong, China
| | - Meng Gu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
| | - Jiantao Fan
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen518055, Guangdong, China
- Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Southern University of Science and Technology, Shenzhen518055, China
| | - Hui Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
- Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development, Southern University of Science and Technology, Shenzhen518055, China
- Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, Shenzhen518055, China
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7
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He Y, Sheng J, Ren Q, Sun Y, Hao W, Dong F. Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ye He
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jianping Sheng
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Qin Ren
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yanjuan Sun
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Weichang Hao
- School of Physics and BUAA-UOW Joint Research Centre, Beihang University, Beijing 100191, China
| | - Fan Dong
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
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8
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In-situ electrochemical surface-enhanced Raman spectroscopy in metal/polyelectrolyte interfaces. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)64041-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Sun Y, Tian J, Mu Z, Tian B, Zhou Q, Liu C, Liu S, Wu Q, Ding M. Unravelling the critical role of surface Nafion adsorption in Pt-catalyzed oxygen reduction reaction by in situ electrical transport spectroscopy. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1428-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Mondal S, Bagchi D, Riyaz M, Sarkar S, Singh AK, Vinod CP, Peter SC. In Situ Mechanistic Insights for the Oxygen Reduction Reaction in Chemically Modulated Ordered Intermetallic Catalyst Promoting Complete Electron Transfer. J Am Chem Soc 2022; 144:11859-11869. [PMID: 35749229 DOI: 10.1021/jacs.2c04541] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The well-known limitation of alkaline fuel cells is the slack kinetics of the cathodic half-cell reaction, the oxygen reduction reaction (ORR). Platinum, being the most active ORR catalyst, is still facing challenges due to its corrosive nature and sluggish kinetics. Many novel approaches for substituting Pt have been reported, which suffer from stability issues even after mighty modifications. Designing an extremely stable, but unexplored ordered intermetallic structure, Pd2Ge, and tuning the electronic environment of the active sites by site-selective Pt substitution to overcome the hurdle of alkaline ORR is the main motive of this paper. The substitution of platinum atoms at a specific Pd position leads to Pt0.2Pd1.8Ge demonstrating a half-wave potential (E1/2) of 0.95 V vs RHE, which outperforms the state-of-the-art catalyst 20% Pt/C. The mass activity (MA) of Pt0.2Pd1.8Ge is 320 mA/mgPt, which is almost 3.2 times better than that of Pt/C. E1/2 and MA remained unaltered even after 50,000 accelerated degradation test (ADT) cycles, which makes it a promising stable catalyst with its activity better than that of the state-of-the-art Pt/C. The undesired 2e- transfer ORR forming hydrogen peroxide (H2O2) is diminished in Pt0.2Pd1.8Ge as visible from the rotating ring-disk electrode (RRDE) experiment, spectroscopically visualized by in situ Fourier transform infrared (FTIR) spectroscopy and supported by computational studies. The effect of Pt substitution on Pd has been properly manifested by X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS). The swinging of the oxidation state of atomic sites of Pt0.2Pd1.8Ge during the reaction is probed by in situ XAS, which efficiently enhances 4e- transfer, producing an extremely low percentage of H2O2.
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Affiliation(s)
- Soumi Mondal
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.,School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Debabrata Bagchi
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.,School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Mohd Riyaz
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.,School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Shreya Sarkar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.,School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Ashutosh Kumar Singh
- School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.,Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore560064, India
| | - C P Vinod
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 410008, India
| | - Sebastian C Peter
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.,School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
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11
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Jacobsen D, Porter J, Ulsh M, Rupnowski P. Spectroscopic Investigation of Catalyst Inks and Thin Films Toward the Development of Ionomer Quality Control. APPLIED SPECTROSCOPY 2022; 76:644-659. [PMID: 35255724 DOI: 10.1177/00037028221080177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As the production of polymer electrolyte fuel cells expands, novel quality control methods must be invented or adapted in order to support expected rates of production. Ensuring the quality of deposited catalyst layers is an essential step in the fuel cell manufacturing process, as the efficiency of a fuel cell is reliant on the catalyst layer being uniform at both the target platinum loading and the target ionomer content. Implementing a quality control method that is sensitive to these aspects is imperative, as wasting precious metals and other catalyst materials is expensive, and represents a potential barrier to entry into the field for manufacturers experimenting with novel deposition processes. In this work, we analyzed catalyst inks to determine if their ionomer content could be quantized spectroscopically. Attenuated total reflection (ATR) Fourier transform infrared spectroscopic technique was investigated producing a signal proportional to the ionomer content. ATR spectroscopy was able to quantitatively differentiate samples in which the ionomer to carbon mass ratio (I/C) varied between 0.9 and 3.0. The I/C ratio was correlated to the measured ATR signal near the CF2 vibrational bands located between 1100 cm-1 and 1400 cm-1. The experimental results obtained constitute a step toward the development of novel quality control methodologies for catalyst inks utilized by the fuel cell industry.
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Affiliation(s)
- Derek Jacobsen
- 3557Colorado School of Mines, Golden, CO, USA
- 53405National Renewable Energy Laboratory (NREL), Golden, CO, USA
| | | | - Michael Ulsh
- 53405National Renewable Energy Laboratory (NREL), Golden, CO, USA
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12
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Ling C, Liu X, Li H, Wang X, Gu H, Wei K, Li M, Shi Y, Ben H, Zhan G, Liang C, Shen W, Li Y, Zhao J, Zhang L. Atomic-Layered Cu 5 Nanoclusters on FeS 2 with Dual Catalytic Sites for Efficient and Selective H 2 O 2 Activation. Angew Chem Int Ed Engl 2022; 61:e202200670. [PMID: 35238130 DOI: 10.1002/anie.202200670] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Indexed: 12/15/2022]
Abstract
Regulating the distribution of reactive oxygen species generated from H2 O2 activation is the prerequisite to ensuring the efficient and safe use of H2 O2 in the chemistry and life science fields. Herein, we demonstrate that constructing a dual Cu-Fe site through the self-assembly of single-atomic-layered Cu5 nanoclusters onto a FeS2 surface achieves selective H2 O2 activation with high efficiency. Unlike its unitary Cu or Fe counterpart, the dual Cu-Fe sites residing at the perimeter zone of the Cu5 /FeS2 interface facilitate H2 O2 adsorption and barrierless decomposition into ⋅OH via forming a bridging Cu-O-O-Fe complex. The robust in situ formation of ⋅OH governed by this atomic-layered catalyst enables the effective oxidation of several refractory toxic pollutants across a broad pH range, including alachlor, sulfadimidine, p-nitrobenzoic acid, p-chlorophenol, p-chloronitrobenzene. This work highlights the concept of building a dual catalytic site in manipulating selective H2 O2 activation on the surface molecular level towards efficient environmental control and beyond.
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Affiliation(s)
- Cancan Ling
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Xiufan Liu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Hao Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Xiaobing Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Huayu Gu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Kai Wei
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Meiqi Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Yanbiao Shi
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China.,School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Haijie Ben
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Guangming Zhan
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Chuan Liang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Wenjuan Shen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Yaling Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Jincai Zhao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China.,School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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13
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N. R. D, B. RB, S. A, M. A, R. J. A simple method for functionalization of polypyrrole-coated cotton fabrics by reduced graphene oxide for UV screening. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2067178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Dhineshbabu N. R.
- Centre for Nano Science and Technology, Anna University, Chennai, India
- Department of Electronics and Communication Engineering, Aditya Engineering College, Surampalem, Andhra Pradesh, India
| | | | - Arunmetha S.
- Department of Electronics and Communication Engineering, KLEF (Deemed to be University), Guntur, Andhra Pradesh, India
| | - Arivanandan M.
- Centre for Nano Science and Technology, Anna University, Chennai, India
| | - Jayavel R.
- Centre for Nano Science and Technology, Anna University, Chennai, India
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14
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Ling C, Liu X, Li H, Wang X, Gu H, Wei K, Li M, Shi Y, Ben H, Zhan G, Liang C, Shen W, Li Y, Zhao J, Zhang L. Atomic‐Layered Cu5 Nanoclusters on FeS2 with Dual Catalytic Sites for Efficient and Selective H2O2 Activation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Cancan Ling
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Xiufan Liu
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Hao Li
- Shanghai Jiaotong University: Shanghai Jiao Tong University School of Environmental Science and Engineering CHINA
| | - Xiaobing Wang
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Huayu Gu
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Kai Wei
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Meiqi Li
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Yanbiao Shi
- Shanghai Jiaotong University: Shanghai Jiao Tong University School of Environmental Science and Engineering CHINA
| | - Haijie Ben
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Guangming Zhan
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Chuan Liang
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Wenjuan Shen
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Yaling Li
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Jincai Zhao
- Huazhong Normal University: Central China Normal University chemistry CHINA
| | - Lizhi Zhang
- Central China Normal University Chemistry Luoyu Road 152 430079 Wuhan CHINA
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15
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Yang Y, Peltier CR, Zeng R, Schimmenti R, Li Q, Huang X, Yan Z, Potsi G, Selhorst R, Lu X, Xu W, Tader M, Soudackov AV, Zhang H, Krumov M, Murray E, Xu P, Hitt J, Xu L, Ko HY, Ernst BG, Bundschu C, Luo A, Markovich D, Hu M, He C, Wang H, Fang J, DiStasio RA, Kourkoutis LF, Singer A, Noonan KJT, Xiao L, Zhuang L, Pivovar BS, Zelenay P, Herrero E, Feliu JM, Suntivich J, Giannelis EP, Hammes-Schiffer S, Arias T, Mavrikakis M, Mallouk TE, Brock JD, Muller DA, DiSalvo FJ, Coates GW, Abruña HD. Electrocatalysis in Alkaline Media and Alkaline Membrane-Based Energy Technologies. Chem Rev 2022; 122:6117-6321. [PMID: 35133808 DOI: 10.1021/acs.chemrev.1c00331] [Citation(s) in RCA: 75] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydrogen energy-based electrochemical energy conversion technologies offer the promise of enabling a transition of the global energy landscape from fossil fuels to renewable energy. Here, we present a comprehensive review of the fundamentals of electrocatalysis in alkaline media and applications in alkaline-based energy technologies, particularly alkaline fuel cells and water electrolyzers. Anion exchange (alkaline) membrane fuel cells (AEMFCs) enable the use of nonprecious electrocatalysts for the sluggish oxygen reduction reaction (ORR), relative to proton exchange membrane fuel cells (PEMFCs), which require Pt-based electrocatalysts. However, the hydrogen oxidation reaction (HOR) kinetics is significantly slower in alkaline media than in acidic media. Understanding these phenomena requires applying theoretical and experimental methods to unravel molecular-level thermodynamics and kinetics of hydrogen and oxygen electrocatalysis and, particularly, the proton-coupled electron transfer (PCET) process that takes place in a proton-deficient alkaline media. Extensive electrochemical and spectroscopic studies, on single-crystal Pt and metal oxides, have contributed to the development of activity descriptors, as well as the identification of the nature of active sites, and the rate-determining steps of the HOR and ORR. Among these, the structure and reactivity of interfacial water serve as key potential and pH-dependent kinetic factors that are helping elucidate the origins of the HOR and ORR activity differences in acids and bases. Additionally, deliberately modulating and controlling catalyst-support interactions have provided valuable insights for enhancing catalyst accessibility and durability during operation. The design and synthesis of highly conductive and durable alkaline membranes/ionomers have enabled AEMFCs to reach initial performance metrics equal to or higher than those of PEMFCs. We emphasize the importance of using membrane electrode assemblies (MEAs) to integrate the often separately pursued/optimized electrocatalyst/support and membranes/ionomer components. Operando/in situ methods, at multiscales, and ab initio simulations provide a mechanistic understanding of electron, ion, and mass transport at catalyst/ionomer/membrane interfaces and the necessary guidance to achieve fuel cell operation in air over thousands of hours. We hope that this Review will serve as a roadmap for advancing the scientific understanding of the fundamental factors governing electrochemical energy conversion in alkaline media with the ultimate goal of achieving ultralow Pt or precious-metal-free high-performance and durable alkaline fuel cells and related technologies.
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Affiliation(s)
- Yao Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Cheyenne R Peltier
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Rui Zeng
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Roberto Schimmenti
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Qihao Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xin Huang
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Zhifei Yan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Georgia Potsi
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Ryan Selhorst
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Xinyao Lu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Weixuan Xu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Mariel Tader
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Alexander V Soudackov
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Hanguang Zhang
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Mihail Krumov
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Ellen Murray
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Pengtao Xu
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Jeremy Hitt
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Linxi Xu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Hsin-Yu Ko
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Brian G Ernst
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Colin Bundschu
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Aileen Luo
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Danielle Markovich
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Meixue Hu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Cheng He
- Chemical and Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Hongsen Wang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Robert A DiStasio
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Lena F Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Andrej Singer
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Kevin J T Noonan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Li Xiao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Lin Zhuang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Bryan S Pivovar
- Chemical and Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Piotr Zelenay
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique Herrero
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Juan M Feliu
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Jin Suntivich
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Emmanuel P Giannelis
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | | | - Tomás Arias
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Thomas E Mallouk
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Joel D Brock
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - David A Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Francis J DiSalvo
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Héctor D Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.,Center for Alkaline Based Energy Solutions (CABES), Cornell University, Ithaca, New York 14853, United States
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16
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Rodrigues MPDS, Dourado AHB, Cutolo LDO, Parreira LS, Alves TV, Slater TJA, Haigh SJ, Camargo PHC, Cordoba de Torresi SI. Gold–Rhodium Nanoflowers for the Plasmon-Enhanced Hydrogen Evolution Reaction under Visible Light. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02938] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - André H. B. Dourado
- Nonequilibrium Chemical Physics, Department of Physics, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany
| | - Leonardo de O. Cutolo
- Instituto de Química Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-080 São Paulo, São Paulo, Brazil
| | - Luanna S Parreira
- Instituto de Química Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-080 São Paulo, São Paulo, Brazil
| | - Tiago Vinicius Alves
- Departamento de Físico-Química, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo, 147, 40170-115 Salvador, Bahia, Brazil
| | - Thomas J. A. Slater
- Electron Physical Sciences Imaging Centre, Diamond Light Source Ltd., Oxfordshire OX11 0DE, U.K
| | - Sarah J. Haigh
- Department of Materials, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Pedro H. C. Camargo
- Department of Chemistry University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
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17
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Lv XW, Xu WS, Tian WW, Wang HY, Yuan ZY. Activity Promotion of Core and Shell in Multifunctional Core-Shell Co 2 P@NC Electrocatalyst by Secondary Metal Doping for Water Electrolysis and Zn-Air Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2101856. [PMID: 34390182 DOI: 10.1002/smll.202101856] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/17/2021] [Indexed: 05/27/2023]
Abstract
Developing cost-efficient multifunctional electrocatalysts is highly critical for the integrated electrochemical energy-conversion systems such as water electrolysis based on hydrogen/oxygen evolution reactions (HER/OER) and metal-air batteries based on OER/oxygen reduction reactions (ORR). The core-shell structured materials with transition metal phosphide as the core and nitrogen-doped carbon (NC) as the shell have been known as promising HER electrocatalysts. However, their oxygen-related electrocatalytic activities still remain unsatisfactory, which severely limits their further applications. Herein an effective strategy to improve the core and shell performances of core-shell Co2 P@NC electrocatalysts through secondary metal (e.g., Fe, Ni, Mo, Al, Mn) doping (termed M-Co2 P@M-N-C) is reported. The as-synthesized M-Co2 P@M-N-C electrocatalysts show multifunctional HER/OER/ORR activities and good integrated capabilities for overall water splitting and Zn-air batteries. Among the M-Co2 P@M-N-C catalysts, Fe-Co2 P@Fe-N-C electrocatalyst exhibits the best catalytic activities, which is closely related to the configuration of highly active species (Fe-doping Co2 P core and Fe-N-C shell) and their subtle synergy, and a stable carbon shell for outstanding durability. Combination of electrochemical-based in situ Fourier transform infrared spectroscopy with extensive experimental investigation provides deep insights into the origin of the activity and the underlying electrocatalytic mechanisms at the molecular level.
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Affiliation(s)
- Xian-Wei Lv
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Institute for Advanced Materials, School of Materials Science and Engineering, Nankai University, Tongyan Road 38, Haihe Educational Park, Tianjin, 300350, China
| | - Wei-Shan Xu
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Institute for Advanced Materials, School of Materials Science and Engineering, Nankai University, Tongyan Road 38, Haihe Educational Park, Tianjin, 300350, China
| | - Wen-Wen Tian
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Institute for Advanced Materials, School of Materials Science and Engineering, Nankai University, Tongyan Road 38, Haihe Educational Park, Tianjin, 300350, China
| | - Hao-Yu Wang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Institute for Advanced Materials, School of Materials Science and Engineering, Nankai University, Tongyan Road 38, Haihe Educational Park, Tianjin, 300350, China
| | - Zhong-Yong Yuan
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Institute for Advanced Materials, School of Materials Science and Engineering, Nankai University, Tongyan Road 38, Haihe Educational Park, Tianjin, 300350, China
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18
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Dix ST, Linic S. In-operando surface-sensitive probing of electrochemical reactions on nanoparticle electrocatalysts: Spectroscopic characterization of reaction intermediates and elementary steps of oxygen reduction reaction on Pt. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Lin Y, Liu Z, Yu L, Zhang G, Tan H, Wu K, Song F, Mechler AK, Schleker PPM, Lu Q, Zhang B, Heumann S. Overall Oxygen Electrocatalysis on Nitrogen-Modified Carbon Catalysts: Identification of Active Sites and In Situ Observation of Reactive Intermediates. Angew Chem Int Ed Engl 2021; 60:3299-3306. [PMID: 33151593 PMCID: PMC7898341 DOI: 10.1002/anie.202012615] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/20/2020] [Indexed: 11/06/2022]
Abstract
The recent mechanistic understanding of active sites, adsorbed intermediate products, and rate-determining steps (RDS) of nitrogen (N)-modified carbon catalysts in electrocatalytic oxygen reduction (ORR) and oxygen evolution reaction (OER) are still rife with controversy because of the inevitable coexistence of diverse N configurations and the technical limitations for the observation of formed intermediates. Herein, seven kinds of aromatic molecules with designated single N species are used as model structures to investigate the explicit role of each common N group in both ORR and OER. Specifically, dynamic evolution of active sites and key adsorbed intermediate products including O2 (ads), superoxide anion O2 - *, and OOH* are monitored with in situ spectroscopy. We propose that the formation of *OOH species from O2 - * (O2 - *+H2 O→OOH*+OH- ) is a possible RDS during the ORR process, whereas the generation of O2 from OOH* species is the most likely RDS during the OER process.
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Affiliation(s)
- Yangming Lin
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
| | - Zigeng Liu
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
- Institut für Energie und Klimaforschung (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
| | - Linhui Yu
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
| | - Gui‐Rong Zhang
- Ernst-Berl-Institut für Technische und Makromolekulare ChemieTechnische Universität DarmstadtAlarich-Weiss-Strasse 864287DarmstadtGermany
| | - Hao Tan
- National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei230029P. R. China
| | - Kuang‐Hsu Wu
- School of Chemical EngineeringUniversity of New South WalesKensington, SydneyNSW2052Australia
| | - Feihong Song
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
| | - Anna K. Mechler
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
| | - P. Philipp M. Schleker
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
- Institut für Energie und Klimaforschung (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
| | - Qing Lu
- Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang110016P. R. China
| | - Saskia Heumann
- Max Planck Institute for Chemical Energy ConversionStiftstrasse 34–3645470Mülheim an der RuhrGermany
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20
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Mani P, Fidal VT, Keshavarz T, Chandra TS, Kyazze G. Laccase Immobilization Strategies for Application as a Cathode Catalyst in Microbial Fuel Cells for Azo Dye Decolourization. Front Microbiol 2021; 11:620075. [PMID: 33537019 PMCID: PMC7847978 DOI: 10.3389/fmicb.2020.620075] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/21/2020] [Indexed: 01/31/2023] Open
Abstract
Enzymatic biocathodes have the potential to replace platinum as an expensive catalyst for the oxygen reduction reaction in microbial fuel cells (MFCs). However, enzymes are fragile and prone to loss of activity with time. This could be circumvented by using suitable immobilization techniques to maintain the activity and increase longevity of the enzyme. In the present study, laccase from Trametes versicolor was immobilized using three different approaches, i.e., crosslinking with electropolymerized polyaniline (PANI), entrapment in copper alginate beads (Cu-Alg), and encapsulation in Nafion micelles (Nafion), in the absence of redox mediators. These laccase systems were employed in cathode chambers of MFCs for decolourization of Acid orange 7 (AO7) dye. The biocatalyst in the anode chamber was Shewanella oneidensis MR-1 in each case. The enzyme in the immobilized states was compared with freely suspended enzyme with respect to dye decolourization at the cathode, enzyme activity retention, power production, and reusability. PANI laccase showed the highest stability and activity, producing a power density of 38 ± 1.7 mW m−2 compared to 25.6 ± 2.1 mW m−2 for Nafion laccase, 14.7 ± 1.04 mW m−2 for Cu-Alg laccase, and 28 ± 0.98 mW m−2 for the freely suspended enzyme. There was 81% enzyme activity retained after 1 cycle (5 days) for PANI laccase compared to 69% for Nafion and 61.5% activity for Cu-alginate laccase and 23.8% activity retention for the freely suspended laccase compared to initial activity. The dye decolourization was highest for freely suspended enzyme with over 85% decolourization whereas for PANI it was 75.6%, Nafion 73%, and 81% Cu-alginate systems, respectively. All the immobilized laccase systems were reusable for two more cycles. The current study explores the potential of laccase immobilized biocathode for dye decolourization in a microbial fuel cell.
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Affiliation(s)
| | - V T Fidal
- Department of Biotechnology, Indian Institute of Technology (Madras), Chennai, India
| | - Taj Keshavarz
- School of Life Sciences, University of Westminster, London, United Kingdom
| | - T S Chandra
- Department of Biotechnology, Indian Institute of Technology (Madras), Chennai, India
| | - Godfrey Kyazze
- School of Life Sciences, University of Westminster, London, United Kingdom
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21
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Malkani AS, Anibal J, Chang X, Xu B. Bridging the Gap in the Mechanistic Understanding of Electrocatalysis via In Situ Characterizations. iScience 2020; 23:101776. [PMID: 33294785 PMCID: PMC7689167 DOI: 10.1016/j.isci.2020.101776] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Electrocatalysis offers a promising strategy to take advantage of the increasingly available and affordable renewable energy for the sustainable production of fuels and chemicals. Attaining this promise requires a molecular level insight of the electrical interface that can be used to tailor the selectivity of electrocatalysts. Addressing this selectivity challenge remains one of the most important areas in modern electrocatalytic research. In this Perspective, we focus on the use of in situ techniques to bridge the gap in the fundamental understanding of electrocatalytic processes. We begin with a brief discussion of traditional electrochemical techniques, ex situ measurements and in silico analysis. Subsequently, we discuss the utility and limitations of in situ methodologies, with a focus on vibrational spectroscopies. We then end by looking ahead toward promising new areas for the application of in situ techniques and improvements to current methods.
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Affiliation(s)
- Arnav S. Malkani
- Center for Catalytic Science and Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Jacob Anibal
- Center for Catalytic Science and Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Xiaoxia Chang
- Center for Catalytic Science and Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Bingjun Xu
- Center for Catalytic Science and Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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22
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Lin Y, Liu Z, Yu L, Zhang G, Tan H, Wu K, Song F, Mechler AK, Schleker PPM, Lu Q, Zhang B, Heumann S. Gesamt‐Sauerstoff‐Elektrokatalyse auf stickstoffmodifizierten Kohlenstoffkatalysatoren: Identifizierung aktiver Zentren und In‐situ‐Beobachtung reaktiver Zwischenprodukte. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012615] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yangming Lin
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
| | - Zigeng Liu
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
- Institut für Energie und Klimaforschung (IEK-9) Forschungszentrum Jülich GmbH 52425 Jülich Deutschland
| | - Linhui Yu
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
| | - Gui‐Rong Zhang
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie Technische Universität Darmstadt Alarich-Weiss-Straße 8 64287 Darmstadt Deutschland
| | - Hao Tan
- National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 VR China
| | - Kuang‐Hsu Wu
- School of Chemical Engineering University of New South Wales Kensington, Sydney NSW 2052 Australien
| | - Feihong Song
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
| | - Anna K. Mechler
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
| | - P. Philipp M. Schleker
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
- Institut für Energie und Klimaforschung (IEK-9) Forschungszentrum Jülich GmbH 52425 Jülich Deutschland
| | - Qing Lu
- Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 VR China
| | - Saskia Heumann
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
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Abstract
The adsorption of O2 on Pt(111) was studied with Density Functional Theory calculations. Various adsorbed states of O2 were evaluated on clean and OH/H2O-covered Pt(111) surfaces at the solid/gas and solid/liquid interfaces. The results reveal that the adsorption of O2 on OH/H2O-covered Pt(111) surface starts with the physical adsorption of O2. Two other adsorption states are reachable from the physisorbed state, the end-on, and bridging chemisorbed O2. Analysis of the energetics of these adsorption states shows that O2 physically adsorbed at the OH/H2O-covered Pt( 111) surface is a high energy state that requires activation to transition to the end-on chemisorbed O2 state. On the other hand, the end-on chemisorbed state can transition to the bridging chemisorbed state with only a small activation energy when a nearby Pt adsorption site is available. Frequency analysis of the physisorbed, end-on, and bridging adsorption states shows that adsorbed O2 stretching frequencies are close to 1400, 1300, and 900 cm-1, respectively.
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24
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Li Y, Intikhab S, Malkani A, Xu B, Snyder J. Ionic Liquid Additives for the Mitigation of Nafion Specific Adsorption on Platinum. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01243] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yawei Li
- Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Saad Intikhab
- Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Arnav Malkani
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Bingjun Xu
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Joshua Snyder
- Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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25
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Impact of ultraviolet radiation on the performance of polymer electrolyte membrane. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04611-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Zhao Z, Chen C, Liu Z, Huang J, Wu M, Liu H, Li Y, Huang Y. Pt-Based Nanocrystal for Electrocatalytic Oxygen Reduction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1808115. [PMID: 31183932 DOI: 10.1002/adma.201808115] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 02/12/2019] [Indexed: 06/09/2023]
Abstract
Currently, Pt-based electrocatalysts are adopted in the practical proton exchange membrane fuel cell (PEMFC), which converts the energy stored in hydrogen and oxygen into electrical power. However, the broad implementation of the PEMFC, like replacing the internal combustion engine in the present automobile fleet, sets a requirement for less Pt loading compared to current devices. In principle, the requirement needs the Pt-based catalyst to be more active and stable. Two main strategies, engineering of the electronic (d-band) structure (including controlling surface facet, tuning surface composition, and engineering surface strain) and optimizing the reactant adsorption sites are discussed and categorized based on the fundamental working principle. In addition, general routes for improving the electrochemical surface area, which improves activity normalized by the unit mass of precious group metal/platinum group metal, and stability of the electrocatalyst are also discussed. Furthermore, the recent progress of full fuel cell tests of novel electrocatalysts is summarized. It is suggested that a better understanding of the reactant/intermediate adsorption, electron transfer, and desorption occurring at the electrolyte-electrode interface is necessary to fully comprehend these electrified surface reactions, and standardized membrane electrode assembly (MEA) testing protocols should be practiced, and data with full parameters detailed, for reliable evaluation of catalyst functions in devices.
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Affiliation(s)
- Zipeng Zhao
- Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA
| | - Changli Chen
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Zeyan Liu
- Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA
| | - Jin Huang
- Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA
| | - Menghao Wu
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Haotian Liu
- Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA
| | - Yujing Li
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yu Huang
- Department of Materials Science and Engineering, University of California, Los Angeles, CA, 90095, USA
- California Nanosystems Institute, University of California, Los Angeles, CA, 90095, USA
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27
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28
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Wang YY, Chen DJ, Allison TC, Tong YJ. Effect of surface-bound sulfide on oxygen reduction reaction on Pt: Breaking the scaling relationship and mechanistic insights. J Chem Phys 2019; 150:041728. [DOI: 10.1063/1.5053815] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yan-Yan Wang
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, DC 20057, USA
| | - De-Jun Chen
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, DC 20057, USA
| | - Thomas C. Allison
- Chemical Informatics Research Group, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8320, Gaithersburg, Maryland 20899, USA
| | - YuYe J. Tong
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, DC 20057, USA
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29
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Gómez-Marín AM, Feliu JM, Ticianelli E. Oxygen Reduction on Platinum Surfaces in Acid Media: Experimental Evidence of a CECE/DISP Initial Reaction Path. ACS Catal 2019. [DOI: 10.1021/acscatal.8b03351] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana M. Gómez-Marín
- Instituto de Química de São Carlos, Universidade de São Paulo, Caixa
Postal 780, Fisico Quimica, Av. Trabalhador Sao Carlense, São Carlos CEP 13560-970, SP, Brazil
- Department of Chemistry, Division of Fundamental Sciences (IEF), Technological Institute of Aeronautics (ITA), São José dos Campos CEP 12228-900, SP, Brazil
| | - Juan M. Feliu
- Instituto de Electroquímica, Universidad de Alicante, Apt 99, E-03080 Alicante, Spain
| | - Edson Ticianelli
- Instituto de Química de São Carlos, Universidade de São Paulo, Caixa
Postal 780, Fisico Quimica, Av. Trabalhador Sao Carlense, São Carlos CEP 13560-970, SP, Brazil
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30
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Li MW, Fu MH, Cao Y, Wang H, Yu H, Qiao Z, Liang H, Peng F. Mn3
O4
@C Nanoparticles Supported on Porous Carbon as Bifunctional Oxygen Electrodes and their Electrocatalytic Mechanism. ChemElectroChem 2018. [DOI: 10.1002/celc.201801464] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ms. Wanqing Li
- School of Chemistry and Chemical Engineering Key Laboratory of Fuel Cell Technology of Guangdong Province; South China University of Technology; Guangzhou 510640 China
| | - Mr. Hongquan Fu
- School of Chemistry and Chemical Engineering Key Laboratory of Fuel Cell Technology of Guangdong Province; South China University of Technology; Guangzhou 510640 China
| | - Yonghai Cao
- School of Chemistry and Chemical Engineering Key Laboratory of Fuel Cell Technology of Guangdong Province; South China University of Technology; Guangzhou 510640 China
| | - Hongjuan Wang
- School of Chemistry and Chemical Engineering Key Laboratory of Fuel Cell Technology of Guangdong Province; South China University of Technology; Guangzhou 510640 China
| | - Hao Yu
- School of Chemistry and Chemical Engineering Key Laboratory of Fuel Cell Technology of Guangdong Province; South China University of Technology; Guangzhou 510640 China
| | - Zhiwei Qiao
- Guangzhou Key Laboratory for New Energy and Green Catalysis School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 China
| | - Hong Liang
- Guangzhou Key Laboratory for New Energy and Green Catalysis School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 China
| | - Feng Peng
- Guangzhou Key Laboratory for New Energy and Green Catalysis School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 China
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31
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Nayak S, McPherson IJ, Vincent KA. Adsorbed Intermediates in Oxygen Reduction on Platinum Nanoparticles Observed by In Situ IR Spectroscopy. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804978] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Simantini Nayak
- Department of Chemistry; University of Oxford; Inorganic Chemistry Laboratory; South Parks Road Oxford OX1 3QR UK
| | - Ian J. McPherson
- Department of Chemistry; University of Oxford; Inorganic Chemistry Laboratory; South Parks Road Oxford OX1 3QR UK
| | - Kylie A. Vincent
- Department of Chemistry; University of Oxford; Inorganic Chemistry Laboratory; South Parks Road Oxford OX1 3QR UK
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32
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Nayak S, McPherson IJ, Vincent KA. Adsorbed Intermediates in Oxygen Reduction on Platinum Nanoparticles Observed by In Situ IR Spectroscopy. Angew Chem Int Ed Engl 2018; 57:12855-12858. [DOI: 10.1002/anie.201804978] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 06/12/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Simantini Nayak
- Department of Chemistry; University of Oxford; Inorganic Chemistry Laboratory; South Parks Road Oxford OX1 3QR UK
| | - Ian J. McPherson
- Department of Chemistry; University of Oxford; Inorganic Chemistry Laboratory; South Parks Road Oxford OX1 3QR UK
| | - Kylie A. Vincent
- Department of Chemistry; University of Oxford; Inorganic Chemistry Laboratory; South Parks Road Oxford OX1 3QR UK
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33
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Gómez-Marín A, Feliu J, Edson T. Reaction Mechanism for Oxygen Reduction on Platinum: Existence of a Fast Initial Chemical Step and a Soluble Species Different from H2O2. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01291] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana Gómez-Marín
- Instituto de Química de São Carlos, Universidade de São Paulo, Caixa Postal 780, Fisico Quimica, Av. Trabalhador Sao Carlense, São Carlos CEP 13560-970, São Paulo, Brazil
- Department of Chemistry, Division of Fundamental Sciences (IEF), Technological Institute of Aeronautics (ITA), 12228-900 São Paulo, Brazil
| | - Juan Feliu
- Instituto de Electroquímica, Universidad de Alicante, Apt 99, E-03080 Alicante, Spain
| | - Ticianelli Edson
- Instituto de Química de São Carlos, Universidade de São Paulo, Caixa Postal 780, Fisico Quimica, Av. Trabalhador Sao Carlense, São Carlos CEP 13560-970, São Paulo, Brazil
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34
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Understanding the influence of the electrochemical double-layer on heterogeneous electrochemical reactions. Curr Opin Chem Eng 2018. [DOI: 10.1016/j.coche.2018.05.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Takagi Y, Wang H, Uemura Y, Nakamura T, Yu L, Sekizawa O, Uruga T, Tada M, Samjeské G, Iwasawa Y, Yokoyama T. In situ study of oxidation states of platinum nanoparticles on a polymer electrolyte fuel cell electrode by near ambient pressure hard X-ray photoelectron spectroscopy. Phys Chem Chem Phys 2018; 19:6013-6021. [PMID: 28184398 DOI: 10.1039/c6cp06634h] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We performed in situ hard X-ray photoelectron spectroscopy (HAXPES) measurements of the electronic states of platinum nanoparticles on the cathode electrocatalyst of a polymer electrolyte fuel cell (PEFC) using a near ambient pressure (NAP) HAXPES instrument having an 8 keV excitation source. We successfully observed in situ NAP-HAXPES spectra of the Pt/C cathode catalysts of PEFCs under working conditions involving water, not only for the Pt 3d states with large photoionization cross-sections in the hard X-ray regime but also for the Pt 4f states and the valence band with small photoionization cross-sections. Thus, this setup allowed in situ observation of a variety of hard PEFC systems under operating conditions. The Pt 4f spectra of the Pt/C electrocatalysts in PEFCs clearly showed peaks originating from oxidized Pt(ii) at 1.4 V, which unambiguously shows that Pt(iv) species do not exist on the Pt nanoparticles even at such large positive voltages. The water oxidation reaction might take place at that potential (the standard potential of 1.23 V versus a standard hydrogen electrode) but such a reaction should not lead to a buildup of detectable Pt(iv) species. The voltage-dependent NAP-HAXPES Pt 3d spectra revealed different behaviors with increasing voltage (0.6 → 1.0 V) compared with decreasing voltage (1.0 → 0.6 V), showing a clear hysteresis. Moreover, quantitative peak-fitting analysis showed that the fraction of non-metallic Pt species matched the ratio of the surface to total Pt atoms in the nanoparticles, which suggests that Pt oxidation only takes place at the surface of the Pt nanoparticles on the PEFC cathode, and the inner Pt atoms do not participate in the reaction. In the valence band spectra, the density of electronic states near the Fermi edge reduces with decreasing particle size, indicating an increase in the electrocatalytic activity. Additionally, a change in the valence band structure due to the oxidation of platinum atoms was also observed at large positive voltages. The developed apparatus is a valuable in situ tool for the investigation of the electronic states of PEFC electrocatalysts under working conditions.
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Affiliation(s)
- Yasumasa Takagi
- Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan. and SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
| | - Heng Wang
- Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan.
| | - Yohei Uemura
- Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan. and SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
| | - Takahiro Nakamura
- Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan.
| | - Liwei Yu
- Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan.
| | - Oki Sekizawa
- Innovation Research Center for Fuel Cells, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Tomoya Uruga
- Innovation Research Center for Fuel Cells, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan and Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan
| | - Mizuki Tada
- Research Center for Materials Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Gabor Samjeské
- Innovation Research Center for Fuel Cells, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Yasuhiro Iwasawa
- Innovation Research Center for Fuel Cells, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Toshihiko Yokoyama
- Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan. and SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
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36
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Direct synthesis of H2O2 on Pd and AuxPd1 clusters: Understanding the effects of alloying Pd with Au. J Catal 2018. [DOI: 10.1016/j.jcat.2017.10.028] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Gao C, Chen S, Quan X, Yu H, Zhang Y. Enhanced Fenton-like catalysis by iron-based metal organic frameworks for degradation of organic pollutants. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.015] [Citation(s) in RCA: 179] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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38
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Wang YC, Kumar SR, Shih CM, Hung WS, An QF, Hsu HC, Huang SH, Lue SJ. High permeance nanofiltration thin film composites with a polyelectrolyte complex top layer containing graphene oxide nanosheets. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.06.074] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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UCHIDA H. Research and Development of Highly Active and Durable Electrocatalysts Based on Multilateral Analyses of Fuel Cell Reactions. ELECTROCHEMISTRY 2017. [DOI: 10.5796/electrochemistry.85.526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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40
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Rudimentary simple, single step fabrication of nano-flakes like AgCd alloy electro-catalyst for oxygen reduction reaction in alkaline fuel cell. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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41
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Jindal A, Gautam DK, Basu S. Electrocatalytic activity of electrospun carbon nitride-polyacrylonitrile nanofiber towards oxygen reduction reactions. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.05.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Kongkanand A, Mathias MF. The Priority and Challenge of High-Power Performance of Low-Platinum Proton-Exchange Membrane Fuel Cells. J Phys Chem Lett 2016; 7:1127-37. [PMID: 26961326 DOI: 10.1021/acs.jpclett.6b00216] [Citation(s) in RCA: 321] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Substantial progress has been made in reducing proton-exchange membrane fuel cell (PEMFC) cathode platinum loadings from 0.4-0.8 mgPt/cm(2) to about 0.1 mgPt/cm(2). However, at this level of cathode Pt loading, large performance loss is observed at high-current density (>1 A/cm(2)), preventing a reduction in the overall stack cost. This next developmental step is being limited by the presence of a resistance term exhibited at these lower Pt loadings and apparently due to a phenomenon at or near the catalyst surface. This issue can be addressed through the design of catalysts with high and stable Pt dispersion as well as through development and implementation of ionomers designed to interact with Pt in a way that does not constrain oxygen reduction reaction rates. Extrapolating from progress made in past decades, we are optimistic that the concerted efforts of materials and electrode designers can resolve this issue, thus enabling a large step toward fuel cell vehicles that are affordable for the mass market.
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Affiliation(s)
- Anusorn Kongkanand
- Fuel Cell Activities, General Motors Global Product Development , Pontiac, Michigan 48340, United States
| | - Mark F Mathias
- Fuel Cell Activities, General Motors Global Product Development , Pontiac, Michigan 48340, United States
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43
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Nesselberger M, Arenz M. In Situ FTIR Spectroscopy: Probing the Electrochemical Interface during the Oxygen Reduction Reaction on a Commercial Platinum High-Surface-Area Catalyst. ChemCatChem 2016. [DOI: 10.1002/cctc.201501193] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Markus Nesselberger
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 2100 Ø Copenhagen Denmark
| | - Matthias Arenz
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 2100 Ø Copenhagen Denmark
- Department of Chemistry and Biochemistry; University of Bern; Freiestrasse 3012 Bern Switzerland
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44
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Ozhukil Kollath V, Karan K. New molecular scale insights into the α-transition of Nafion® thin films from variable temperature ATR-FTIR spectroscopy. Phys Chem Chem Phys 2016; 18:26144-26150. [DOI: 10.1039/c6cp04457c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
IR spectroscopy based direct evidence of long range order–disorder in the Nafion backbone correlated with the α-transition temperature.
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Affiliation(s)
- V. Ozhukil Kollath
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Calgary
- Canada
| | - K. Karan
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Calgary
- Canada
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45
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Wilson NM, Flaherty DW. Mechanism for the Direct Synthesis of H2O2 on Pd Clusters: Heterolytic Reaction Pathways at the Liquid–Solid Interface. J Am Chem Soc 2015; 138:574-86. [DOI: 10.1021/jacs.5b10669] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Neil M. Wilson
- Department of Chemical and
Biomolecular Engineering University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
| | - David W. Flaherty
- Department of Chemical and
Biomolecular Engineering University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
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46
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Lue SJ, Pai YL, Shih CM, Wu MC, Lai SM. Novel bilayer well-aligned Nafion/graphene oxide composite membranes prepared using spin coating method for direct liquid fuel cells. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.07.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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47
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Nie Y, Zhang L, Li YY, Hu C. Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO(3) and H(2)O(2). JOURNAL OF HAZARDOUS MATERIALS 2015; 294:195-200. [PMID: 25867592 DOI: 10.1016/j.jhazmat.2015.03.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 03/23/2015] [Accepted: 03/30/2015] [Indexed: 05/29/2023]
Abstract
Nanoscale LaFeO(3) was prepared via sol-gel method and characterized by XRD, FTIR and N2 adsorption/desorption experiment. The results indicated that, LaFeO(3) had a typical perovskite structure with a BET area of 8.5m(2)/g. LaFeO(3) exhibited excellent Fenton activity and stability for the degradation of pharmaceuticals and herbicides in water, as demonstrated with sulfamethoxazole, phenazone, phenytoin, acyclovir and 2,4-dichlorophenoxyacetic acid, 2-chlorophenol. Among them, sulfamethoxazole (SMX) could be completely removed in LaFeO(3)-H(2)O(2) system after reaction for 120 min at neutral pH. Based on the ATR-FTIR analysis, the surface complex of LaFeO(3) and H(2)O(2). was formed, which was important and essential for the enhanced Fenton reaction by accelerating the cycle of Fe(3+)/Fe(2+). Hence, more OH and O(2)(-)/HO(2)(-) were then produced in LaFeO(3)-H(2)O(2) system, resulting in more efficient removal of refractory organic compounds. Based on the surface interaction of LaFeO(3) and H(2)O(2), a heterogeneous Fenton reaction mechanism was proposed.
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Affiliation(s)
- Yulun Nie
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Lili Zhang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Chun Hu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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48
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Latsuzbaia R, Negro E, Koper GJM. Environmentally Friendly Carbon-Preserving Recovery of Noble Metals From Supported Fuel Cell Catalysts. CHEMSUSCHEM 2015; 8:1926-1934. [PMID: 25959077 DOI: 10.1002/cssc.201500019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 02/24/2015] [Indexed: 06/04/2023]
Abstract
The dissolution of noble-metal catalysts under mild and carbon-preserving conditions offers the possibility of in situ regeneration of the catalyst nanoparticles in fuel cells or other applications. Here, we report on the complete dissolution of the fuel cell catalyst, platinum nanoparticles, under very mild conditions at room temperature in 0.1 M HClO4 and 0.1 M HCl by electrochemical potential cycling between 0.5-1.1 V at a scan rate of 50 mV s(-1) . Dissolution rates as high as 22.5 μg cm(-2) per cycle were achieved, which ensured a relatively short dissolution timescale of 3-5 h for a Pt loading of 0.35 mg cm(-2) on carbon. The influence of chloride ions and oxygen in the electrolyte on the dissolution was investigated, and a dissolution mechanism is proposed on the basis of the experimental observations and available literature results. During the dissolution process, the corrosion of the carbon support was minimal, as observed by X-ray photoelectron spectroscopy (XPS).
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Affiliation(s)
- R Latsuzbaia
- Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft (Netherlands)
| | - E Negro
- Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft (Netherlands)
| | - G J M Koper
- Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft (Netherlands).
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49
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Jindal A, Basu S, P. AC. Electrospun carbon nitride supported on poly(vinyl) alcohol as an electrocatalyst for oxygen reduction reactions. RSC Adv 2015. [DOI: 10.1039/c5ra10884e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dense, multi-layered poly(vinyl) alcohol nanofibers dispersed with catalytically active carbon nitride nanoparticles were synthesized using an electrospinning process.
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Affiliation(s)
- Amandeep Jindal
- Department of Chemical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Suddhasatwa Basu
- Department of Chemical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Aby C. P.
- Bio-Nano Electronics Research Centre
- Toyo University
- Kawagoe
- Japan
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50
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Tamanna T, Bulitta JB, Landersdorfer CB, Cashin V, Yu A. Stability and controlled antibiotic release from thin films embedded with antibiotic loaded mesoporous silica nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra22976f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Thin films incorporated with gentamicin loaded mesoporous silica nanoparticles exhibit excellent stability and controlled release profile of the encapsulated antibiotic.
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Affiliation(s)
- Tasnuva Tamanna
- Faculty of Science
- Engineering and Technology
- Swinburne University of Technology
- Australia
| | - Jurgen B. Bulitta
- Center for Pharmacometrics and Systems Pharmacology
- College of Pharmacy
- University of Florida
- USA
| | - Cornelia B. Landersdorfer
- Drug Delivery, Disposition and Dynamics
- Monash Institute of Pharmaceutical Sciences
- Monash University
- Australia
| | - Veronica Cashin
- Faculty of Science
- Engineering and Technology
- Swinburne University of Technology
- Australia
| | - Aimin Yu
- Faculty of Science
- Engineering and Technology
- Swinburne University of Technology
- Australia
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