1
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Yang S, Liu X, Li S, Yuan W, Yang L, Wang T, Zheng H, Cao R, Zhang W. The mechanism of water oxidation using transition metal-based heterogeneous electrocatalysts. Chem Soc Rev 2024; 53:5593-5625. [PMID: 38646825 DOI: 10.1039/d3cs01031g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
The water oxidation reaction, a crucial process for solar energy conversion, has garnered significant research attention. Achieving efficient energy conversion requires the development of cost-effective and durable water oxidation catalysts. To design effective catalysts, it is essential to have a fundamental understanding of the reaction mechanisms. This review presents a comprehensive overview of recent advancements in the understanding of the mechanisms of water oxidation using transition metal-based heterogeneous electrocatalysts, including Mn, Fe, Co, Ni, and Cu-based catalysts. It highlights the catalytic mechanisms of different transition metals and emphasizes the importance of monitoring of key intermediates to explore the reaction pathway. In addition, advanced techniques for physical characterization of water oxidation intermediates are also introduced, for the purpose of providing information for establishing reliable methodologies in water oxidation research. The study of transition metal-based water oxidation electrocatalysts is instrumental in providing novel insights into understanding both natural and artificial energy conversion processes.
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Affiliation(s)
- Shujiao Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Xiaohan Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Sisi Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Wenjie Yuan
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Luna Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Ting Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Haoquan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
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2
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Yang S, Yue K, Liu X, Li S, Zheng H, Yan Y, Cao R, Zhang W. Electrocatalytic water oxidation with manganese phosphates. Nat Commun 2024; 15:1410. [PMID: 38360868 PMCID: PMC10869713 DOI: 10.1038/s41467-024-45705-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 02/01/2024] [Indexed: 02/17/2024] Open
Abstract
As inspired by the Mn4CaO5 oxygen evolution center in nature, Mn-based electrocatalysts have received overwhelming attention for water oxidation. However, the understanding of the detailed reaction mechanism has been a long-standing problem. Herein, homologous KMnPO4 and KMnPO4•H2O with 4-coordinated and 6-coordinated Mn centers, respectively, are prepared. The two catalysts constitute an ideal platform to study the structure-performance correlation. The presence of Mn(III), Mn(IV), and Mn(V) intermediate species are identified during water oxidation. The Mn(V)=O species is demonstrated to be the substance for O-O bond formation. In KMnPO4•H2O, the Mn coordination structure did not change significantly during water oxidation. In KMnPO4, the Mn coordination structure changed from 4-coordinated [MnO4] to 5-coordinated [MnO5] motif, which displays a triangular biconical configuration. The structure flexibility of [MnO5] is thermodynamically favored in retaining Mn(III)-OH and generating Mn(V)=O. The Mn(V)=O species is at equilibrium with Mn(IV)=O, the concentration of which determines the intrinsic activity of water oxidation. This study provides a clear picture of water oxidation mechanism on Mn-based systems.
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Affiliation(s)
- Shujiao Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Kaihang Yue
- Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), Shanghai, 200050, China
| | - Xiaohan Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Sisi Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Haoquan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Ya Yan
- Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), Shanghai, 200050, China.
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.
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3
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Park S, Jang T, Choi S, Lee YH, Cho KH, Lee MY, Seo H, Lim HK, Kim Y, Ryu J, Im SW, Kim MG, Park JS, Kim M, Jin K, Kim SH, Park GS, Kim H, Nam KT. Iridium-Cooperated, Symmetry-Broken Manganese Oxide Nanocatalyst for Water Oxidation. J Am Chem Soc 2023. [PMID: 38047734 DOI: 10.1021/jacs.3c07411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The water oxidation reaction, the most important reaction for hydrogen production and other sustainable chemistry, is efficiently catalyzed by the Mn4CaO5 cluster in biological photosystem II. However, synthetic Mn-based heterogeneous electrocatalysts exhibit inferior catalytic activity at neutral pH under mild conditions. Symmetry-broken Mn atoms and their cooperative mechanism through efficient oxidative charge accumulation in biological clusters are important lessons but synthesis strategies for heterogeneous electrocatalysts have not been successfully developed. Here, we report a crystallographically distorted Mn-oxide nanocatalyst, in which Ir atoms break the space group symmetry from I41/amd to P1. Tetrahedral Mn(II) in spinel is partially replaced by Ir, surprisingly resulting in an unprecedented crystal structure. We analyzed the distorted crystal structure of manganese oxide using TEM and investigated how the charge accumulation of Mn atoms is facilitated by the presence of a small amount of Ir.
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Affiliation(s)
- Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
- Soft Foundry, Seoul National University, Seoul 08826, Republic of Korea
| | - Taehwan Jang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Seungwoo Choi
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoon Ho Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Moo Young Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyung Kyu Lim
- Division of Chemical Engineering and Bioengineering, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Yujeong Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul 03759, Republic of Korea
| | - Jinseok Ryu
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang Won Im
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Min Gyu Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Ji-Sang Park
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Miyoung Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Sun Hee Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul 03759, Republic of Korea
| | - Gyeong-Su Park
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
- Soft Foundry, Seoul National University, Seoul 08826, Republic of Korea
- Institute of Next-Generation Semiconductor Convergence Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Hyungjun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
- Soft Foundry, Seoul National University, Seoul 08826, Republic of Korea
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4
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Li J, Zheng C, Zhao E, Mao J, Cheng Y, Liu H, Hu Z, Ling T. Ferromagnetic ordering correlated strong metal-oxygen hybridization for superior oxygen reduction reaction activity. Proc Natl Acad Sci U S A 2023; 120:e2307901120. [PMID: 37844253 PMCID: PMC10614601 DOI: 10.1073/pnas.2307901120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 09/06/2023] [Indexed: 10/18/2023] Open
Abstract
The efficiency of transition-metal oxide materials toward oxygen-related electrochemical reactions is classically controlled by metal-oxygen hybridization. Recently, the unique magnetic exchange interactions in transition-metal oxides are proposed to facilitate charge transfer and reduce activation barrier in electrochemical reactions. Such spin/magnetism-related effects offer a new and rich playground to engineer oxide electrocatalysts, but their connection with the classical metal-oxygen hybridization theory remains an open question. Here, using the MnxVyOz family as a platform, we show that ferromagnetic (FM) ordering is intrinsically correlated with the strong manganese (Mn)-oxygen (O) hybridization of Mn oxides, thus significantly increasing the oxygen reduction reaction (ORR) activity. We demonstrate that this enhanced Mn-O hybridization in FM Mn oxides is closely associated with the generation of active Mn sites on the oxide surface and obtaining favorable reaction thermodynamics under operating conditions. As a result, FM-Mn2V2O7 with a high degree of Mn-O hybridization achieves a record high ORR activity. Our work highlights the potential applications of magnetic oxide materials with strong metal-oxygen hybridization in energy devices.
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Affiliation(s)
- Jisi Li
- School of Materials Science and Engineering, Tianjin University, Tianjin300072, China
| | - Caiyan Zheng
- School of Physics, Nankai University, Tianjin300071, China
| | - Erling Zhao
- School of Materials Science and Engineering, Tianjin University, Tianjin300072, China
| | - Jing Mao
- School of Materials Science and Engineering, Tianjin University, Tianjin300072, China
| | - Yahui Cheng
- Department of Electronics, Nankai University, Tianjin300350, China
| | - Hui Liu
- School of Materials Science and Engineering, Tianjin University, Tianjin300072, China
| | - Zhenpeng Hu
- School of Physics, Nankai University, Tianjin300071, China
| | - Tao Ling
- School of Materials Science and Engineering, Tianjin University, Tianjin300072, China
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5
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Choi WI, Choi S, Balamurugan M, Park S, Cho KH, Seo H, Ha H, Nam KT. Ru-Doped Co 3O 4 Nanoparticles as Efficient and Stable Electrocatalysts for the Chlorine Evolution Reaction. ACS OMEGA 2023; 8:35034-35043. [PMID: 37779938 PMCID: PMC10536866 DOI: 10.1021/acsomega.3c04525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/31/2023] [Indexed: 10/03/2023]
Abstract
The electrochemical chlorine evolution reaction (CER) is one of the most important electrochemical reactions. Typically, iridium (Ir)- or ruthenium (Ru)-based mixed metal oxides have been used as electrocatalysts for the CER due to their high activities and durabilities. However, the scarcity of Ir and Ru has indicated the need to develop alternative earth-abundant transition-metal-based CER catalysts. In this study, we report a Co3O4 nanoparticle (NP) catalyst synthesized by a hydrothermal method. Furthermore, Ru was successfully incorporated into the Co3O4 NPs (RuxCo3-xO4 NPs) for further improvement of catalytic performance in chlorine generation. Electrokinetic analyses combined with in situ X-ray absorption near-edge structure (XANES) results suggested an identical CER mechanism for the Co3O4 NPs and RuxCo3-xO4 NPs. Various characterization techniques demonstrated that the homogeneous substitution of Ru4+ ions into the Co3+ octahedral sites enhanced the structural disorder and changed the electronic state of Co3O4, resulting in additional exposed active sites. Remarkably, the Ru0.09Co2.91O4 NP electrode exhibited outstanding stability for more than 150 h even at a high current density of 500 mA/cm2, which shows its commercial viability for active chlorine generation.
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Affiliation(s)
- Won Il Choi
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Seungwoo Choi
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
- Soft
Foundry, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Mani Balamurugan
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
- Soft
Foundry, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Sunghak Park
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Kang Hee Cho
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Hongmin Seo
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Heonjin Ha
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
| | - Ki Tae Nam
- Department
of Materials Science and Engineering, Seoul
National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
- Soft
Foundry, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of Korea
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6
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Sa YJ, Kim S, Lee Y, Kim JM, Joo SH. Mesoporous Manganese Oxides with High-Valent Mn Species and Disordered Local Structures for Efficient Oxygen Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37339373 DOI: 10.1021/acsami.3c03358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Active and nonprecious-metal bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are vital components of clean energy conversion devices such as regenerative fuel cells and rechargeable metal-air batteries. Porous manganese oxides (MnOx) are promising electrocatalyst candidates because of their high surface area and the abundance of Mn. MnOx catalysts exhibit various oxidation states and crystal structures, which critically affect their electrocatalytic activity. These effects remain elusive mainly because the synthesis of oxidation-state-controlled porous MnOx with similar structural properties is challenging. In this work, four different mesoporous manganese oxides (m-MnOx) were synthesized and used as model catalysts to investigate the effects of local structures and Mn valence states on the activity toward oxygen electrocatalysis. The following activity trends were observed: m-Mn2O3 > m-MnO2 > m-MnO > m-Mn3O4 for the ORR and m-MnO2 > m-Mn2O3 > m-MnO ≈ m-Mn3O4 for the OER. These activity trends suggest that high-valent Mn species (Mn(III) and Mn(IV)) with disordered atomic arrangements induced by nanostructuring significantly influence electrocatalysis. In situ X-ray absorption spectroscopy was used to analyze the changes in the oxidation states under the ORR and OER conditions, which showed the surface phase transformation and generation of active species during electrocatalysis.
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Affiliation(s)
- Young Jin Sa
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Sohee Kim
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Yesol Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Ji Man Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sang Hoon Joo
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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7
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Miao J, Song J, Lang J, Zhu Y, Dai J, Wei Y, Long M, Shao Z, Zhou B, Alvarez PJJ, Zhang L. Single-Atom MnN 5 Catalytic Sites Enable Efficient Peroxymonosulfate Activation by Forming Highly Reactive Mn(IV)-Oxo Species. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:4266-4275. [PMID: 36849443 DOI: 10.1021/acs.est.2c08836] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Four-nitrogen-coordinated transitional metal (MN4) configurations in single-atom catalysts (SACs) are broadly recognized as the most efficient active sites in peroxymonosulfate (PMS)-based advanced oxidation processes. However, SACs with a coordination number higher than four are rarely explored, which represents a fundamental missed opportunity for coordination chemistry to boost PMS activation and degradation of recalcitrant organic pollutants. We experimentally and theoretically demonstrate here that five-nitrogen-coordinated Mn (MnN5) sites more effectively activate PMS than MnN4 sites, by facilitating the cleavage of the O-O bond into high-valent Mn(IV)-oxo species with nearly 100% selectivity. The high activity of MnN5 was discerned to be due to the formation of higher-spin-state N5Mn(IV)═O species, which enable efficient two-electron transfer from organics to Mn sites through a lower-energy-barrier pathway. Overall, this work demonstrates the importance of high coordination numbers in SACs for efficient PMS activation and informs the design of next-generation environmental catalysts.
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Affiliation(s)
- Jie Miao
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jian Song
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Junyu Lang
- School of Physical Science and Technology, Shanghai Tech University, 393 Huaxia Middle Road, Shanghai 201210, China
| | - Yuan Zhu
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT7 1NN, U.K
| | - Jie Dai
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yan Wei
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Mingce Long
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zongping Shao
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, Western Australia 6845, Australia
| | - Baoxue Zhou
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
| | - Lizhi Zhang
- School of Environmental Science and Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
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8
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Xia-Hou YJ, Yu Y, Zheng JR, Yi J, Zhou J, Qin TX, You EM, Chen HL, Ding SY, Zhang L, Chang KL, Chen K, Moskovits M, Tian ZQ. Graphene Coated Dielectric Hierarchical Nanostructures for Highly Sensitive Broadband Infrared Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206167. [PMID: 36504426 DOI: 10.1002/smll.202206167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Broadband infrared (IR) absorption is sought after for wide range of applications. Graphene can support IR plasmonic waves tightly bound to its surface, leading to an intensified near-field. However, the excitation of graphene plasmonic waves usually relies on resonances. Thus, it is still difficult to directly obtain both high near-field intensity and high absorption rate in ultra-broad IR band. Herein, a novel method is proposed to directly realize high near-field intensity in broadband IR band by graphene coated manganous oxide microwires featured hierarchical nanostructures (HNSs-MnO@Gr MWs) both experimentally and theoretically. Both near-field intensity and IR absorption of HNSs-MnO@Gr MWs are enhanced by at least one order of magnitude compared to microwires with smooth surfaces. The results demonstrate that the HNSs-MnO@Gr MWs support vibrational sensing of small organic molecules, covering the whole fingerprint region and function group region. Compared with the graphene-flake-based enhancers, the signal enhancement factors reach a record high of 103 . Furthermore, just a single HNSs-MnO@Gr MW can be constructed to realize sensitively photoresponse with high responsivity (over 3000 V W-1 ) from near-IR to mid-IR. The graphene coated dielectric hierarchical micro/nanoplatform with enhanced near-field intensity is scalable and can harness for potential applications including spectroscopy, optoelectronics, and sensing.
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Affiliation(s)
- Yu-Jiao Xia-Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - Yu Yu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, P. R. China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China
| | - Jun-Rong Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - Jun Yi
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - Jing Zhou
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, P. R. China
| | - Ting-Xiao Qin
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - En-Ming You
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - Hai-Long Chen
- The Laboratory of Soft Matter Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Song-Yuan Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - Li Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
| | - Kai-Li Chang
- Center for the Physics of Low-Dimensional Materials, School of Physics and Electronics, Henan University, Kaifeng, 475004, P. R. China
| | - Ke Chen
- Center for the Physics of Low-Dimensional Materials, School of Physics and Electronics, Henan University, Kaifeng, 475004, P. R. China
| | - Martin Moskovits
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
- Department of Chemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Zhong-Qun Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, School of Electronic Science and Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, P. R. China
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9
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Hayakawa T, Arakawa M, Minamikawa K, Fujimoto S, Kawano T, Terasaki A. Oxidation-state analysis of manganese-oxide clusters, Mn O+ (x = 4, y = 4–7), by X-ray absorption spectroscopy. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Villalobos J, Morales DM, Antipin D, Schuck G, Golnak R, Xiao J, Risch M. Stabilization of a Mn-Co Oxide During Oxygen Evolution in Alkaline Media. ChemElectroChem 2022; 9:e202200482. [PMID: 35915742 PMCID: PMC9328349 DOI: 10.1002/celc.202200482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/01/2022] [Indexed: 11/08/2022]
Abstract
Improving the stability of electrocatalysts for the oxygen evolution reaction (OER) through materials design has received less attention than improving their catalytic activity. We explored the effects of Mn addition to a cobalt oxide for stabilizing the catalyst by comparing single phase CoOx and (Co0.7Mn0.3)Ox films electrodeposited in alkaline solution. The obtained disordered films were classified as layered oxides using X-ray absorption spectroscopy (XAS). The CoOx films showed a constant decrease in the catalytic activity during cycling, confirmed by oxygen detection, while that of (Co0.7Mn0.3)Ox remained constant within error as measured by electrochemical metrics. These trends were rationalized based on XAS analysis of the metal oxidation states, which were Co2.7+ and Mn3.7+ in the bulk and similar near the surface of (Co0.7Mn0.3)Ox, before and after cycling. Thus, Mn in (Co0.7Mn0.3)Ox successfully stabilized the bulk catalyst material and its surface activity during OER cycling. The development of stabilization approaches is essential to extend the durability of OER catalysts.
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Affiliation(s)
- Javier Villalobos
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner Platz 1Berlin14109Germany
| | - Dulce M. Morales
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner Platz 1Berlin14109Germany
| | - Denis Antipin
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner Platz 1Berlin14109Germany
| | - Götz Schuck
- Abteilung Struktur und Dynamik von EnergiematerialienHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner Platz 1Berlin14109Germany
| | - Ronny Golnak
- Department of Highly Sensitive X-ray SpectroscopyHelmholtz-Zentrum Berlin für Materialien und Energie GmbHAlbert-Einstein-Straße 15Berlin12489Germany
| | - Jie Xiao
- Department of Highly Sensitive X-ray SpectroscopyHelmholtz-Zentrum Berlin für Materialien und Energie GmbHAlbert-Einstein-Straße 15Berlin12489Germany
| | - Marcel Risch
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner Platz 1Berlin14109Germany
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11
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Sakai A, Harada K, Tsunekawa S, Tamura Y, Ito M, Hatada K, Ina T, Ohara T, Wang KH, Kawai T, Yoshida M. Development of a MnCO 3-based Electrocatalyst for Water Oxidation from Rhodochrosite Ore. CHEM LETT 2022. [DOI: 10.1246/cl.220221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Arisu Sakai
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Kazuki Harada
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Shun Tsunekawa
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | | | - Masaya Ito
- University of Toyama, Gofuku, Toyama 930-8555, Japan
| | | | - Toshiaki Ina
- Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
| | - Takumi Ohara
- Tokyo University of Science, Shinjuku Katsushika-ku, Tokyo 125-8585, Japan
| | - Ke-Hsuan Wang
- Tokyo University of Science, Shinjuku Katsushika-ku, Tokyo 125-8585, Japan
| | - Takeshi Kawai
- Tokyo University of Science, Shinjuku Katsushika-ku, Tokyo 125-8585, Japan
| | - Masaaki Yoshida
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
- ICAT Fellow, Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
- Blue Energy Center for SGE Technology (BEST), Ube, Yamaguchi 755-8611, Japan
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12
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Ibrahim S, Mohsin Saleem M, Imran M, Ali Shah W, Cordes D, M. Z. Slawin A, Arif Nadeem M. A two-dimensional manganese-containing coordination polymer for efficient catalysis of the oxygen evolution. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Tsunekawa S, Sakai A, Tamura Y, Hatada K, Ina T, Wang KH, Kawai T, Yoshida M. Development of a MnOOH Mineral Electrocatalyst for Water Splitting by Controlling the Surface Defects of a Naturally Occurring Ore. CHEM LETT 2022. [DOI: 10.1246/cl.210539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shun Tsunekawa
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Arisu Sakai
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | | | | | - Toshiaki Ina
- Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
| | - Ke-Hsuan Wang
- Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Takeshi Kawai
- Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Masaaki Yoshida
- Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
- ICAT Fellow, Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
- Blue Energy Center for SGE Technology (BEST), Ube, Yamaguchi 755-8611, Japan
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14
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Tavar D, Kamlesh K, Prakash S, Kumar P, Raizada P, Srivastava AK, Singh A, Sharma RK. Investigation of Li-excess Manganese Oxide Spinel Structure for Electrochemical Water Oxidation Catalysis. Dalton Trans 2022; 51:12558-12568. [DOI: 10.1039/d2dt01964g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rapid development of efficient and cost-effective catalysts is essential for oxygen evolution reaction. Herein, nanostructured spinels LiMn2O4, delithiated λ-MnO2, and Li4Mn5O12 have been synthesized at low temperature and are...
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15
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Chen Y, Yang S, Liu H, Zhang W, Cao R. An unusual network of α-MnO2 nanowires with structure-induced hydrophilicity and conductivity for improved electrocatalysis. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(21)63793-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Li Y, Wei X, Han S, Chen L, Shi J. MnO
2
Electrocatalysts Coordinating Alcohol Oxidation for Ultra‐Durable Hydrogen and Chemical Productions in Acidic Solutions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107510] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yan Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 P. R. China
| | - Xinfa Wei
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 P. R. China
| | - Shuhe Han
- Department of Chemistry Institute of Molecular Plus School of Science Tianjin University Tianjin 300072 China
| | - Lisong Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 P. R. China
| | - Jianlin Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 P. R. China
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17
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Li Y, Wei X, Han S, Chen L, Shi J. MnO 2 Electrocatalysts Coordinating Alcohol Oxidation for Ultra-Durable Hydrogen and Chemical Productions in Acidic Solutions. Angew Chem Int Ed Engl 2021; 60:21464-21472. [PMID: 34322983 DOI: 10.1002/anie.202107510] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Indexed: 11/08/2022]
Abstract
Electrocatalytic hydrogen production under acidic conditions is of great importance for industrialization in comparison to that in alkaline media, which, unfortunately, still remains challenging due to the lack of earth-abundant, cost-effective and highly active anodic electrocatalysts that can be used durably under strongly acidic conditions. Here we report an unexpected finding that manganese oxide, a kind of common non-noble catalysts easily soluble in acidic solutions, can be applied as a highly efficient and extremely durable anodic electrocatalyst for hydrogen production from an acidic aqueous solution of alcohols. Particularly in a glycerol solution, a potential of as low as 1.36 V (vs. RHE) is needed at 10 mA cm-2 , which is 270 mV lower than that of oxygen evolution reaction (OER), to oxidize glycerol into value-added chemicals such as formic acid, without oxygen production. To our surprise, the manganese oxide exhibits extremely high stability for electrocatalytic hydrogen production in coupling with glycerol oxidation for longer than 865 hours compared to shorter than 10 h for OER. Moreover, the effect of the addition of glycerol on the electrochemical durability has been probed via in situ Raman spectroscopic analysis and density functional theory (DFT) calculations. This work demonstrates that acid-unstable metal oxide electrocatalysts can be used robustly in acidic media under the presence of certain substances for electrochemical purposes, such as hydrogen production.
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Affiliation(s)
- Yan Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| | - Xinfa Wei
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| | - Shuhe Han
- Department of Chemistry, Institute of Molecular Plus, School of Science, Tianjin University, Tianjin, 300072, China
| | - Lisong Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| | - Jianlin Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
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18
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Seo H, Park S, Cho KH, Choi S, Ko C, Randriamahazaka H, Nam KT. Complex Impedance Analysis on Charge Accumulation Step of Mn 3O 4 Nanoparticles during Water Oxidation. ACS OMEGA 2021; 6:18404-18413. [PMID: 34308071 PMCID: PMC8296608 DOI: 10.1021/acsomega.1c02397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 06/24/2021] [Indexed: 06/13/2023]
Abstract
The development of efficient water-oxidizing electrocatalysts is a key issue for achieving high performance in the overall water electrolysis technique. However, the complexity of multiple electron transfer processes and large activation energies have been regarded as major bottlenecks for efficient water electrolysis. Thus, complete electrochemical processes, including electron transport, charge accumulation, and chemical bond formation/dissociation, need to be analyzed for establishing a design rule for film-type electrocatalysts. In light of this, complex capacitance analysis is an effective tool for investigating the charge accumulation and dissipation processes of film-type electrocatalysts. Here, we conduct complex capacitance analysis for the Mn3O4 nanocatalyst, which exhibits superb catalytic activity for water oxidation under neutral conditions. Charge was accumulated on the catalyst surface by the change in Mn valence between Mn(II) and Mn(IV) prior to the rate-determining O-O bond forming step. Furthermore, we newly propose the dissipation ratio (D) for understanding the energy balance between charge accumulation and charge consumption for chemical O-O bond formation. From this analysis, we reveal the potential- and thickness-dependent contribution of the charge accumulation process on the overall catalytic efficiency. We think that an understanding of complex capacitance analysis could be an effective methodology for investigating the charge accumulation process on the surface of general film-type electrocatalysts.
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Affiliation(s)
- Hongmin Seo
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, Republic of Korea
| | - Sunghak Park
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, Republic of Korea
- Nano
System Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Kang Hee Cho
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, Republic of Korea
| | - Seungwoo Choi
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, Republic of Korea
| | - Changwan Ko
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, Republic of Korea
| | - Hyacinthe Randriamahazaka
- ITODYS,
UMR 7086 CNRS, SIELE Group, Université Paris Diderot, Paris 75013, France
- Chemistry,
Université Paris Diderot, Paris 75205, France
| | - Ki Tae Nam
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, Republic of Korea
- Nano
System Institute, Seoul National University, Seoul 08826, Republic of Korea
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19
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Bae H, Kim H, Burungale V, Min J, Cha A, Rho H, Ryu S, Kang SH, Ha J. Hydrothermal Synthesis of
CaMn
2
O
4
·
xH
2
O
Nanorods as Co‐Catalysts on
GaN
Nanowire Photoanode. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Hyojung Bae
- School of Chemical Engineering and Optoelectronics Convergence Research Center Chonnam National University Buk‐gu Gwangju 61186 Korea
| | - Hyunggu Kim
- School of Chemical Engineering and Optoelectronics Convergence Research Center Chonnam National University Buk‐gu Gwangju 61186 Korea
| | - Vishal Burungale
- School of Chemical Engineering and Optoelectronics Convergence Research Center Chonnam National University Buk‐gu Gwangju 61186 Korea
| | - Jung‐Wook Min
- Photonics Laboratory King Abdullah University of Science and Technology Thuwal 23955‐6900 Saudi Arabia
| | - An‐na Cha
- School of Chemical Engineering and Optoelectronics Convergence Research Center Chonnam National University Buk‐gu Gwangju 61186 Korea
| | - Hokyun Rho
- Energy Convergence Core Facility Chonnam National University Gwangju 61186 Korea
| | - Sang‐Wan Ryu
- Department of Physics and Optoelectronics Convergence Research Center Chonnam National University Gwangju 61186 Korea
| | - Soon Hyung Kang
- Department of Chemistry Education and Optoelectronics Convergence Research Center Chonnam National University Gwangju 61186 Korea
| | - Jun‐Seok Ha
- School of Chemical Engineering and Optoelectronics Convergence Research Center Chonnam National University Buk‐gu Gwangju 61186 Korea
- Energy Convergence Core Facility Chonnam National University Gwangju 61186 Korea
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20
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Yoon S, Jin K, Lee S, Nam KT, Kim M, Kwon YK. Effects of paramagnetic fluctuations on the thermochemistry of MnO(100) surfaces in the oxygen evolution reaction. Phys Chem Chem Phys 2021; 23:859-865. [PMID: 33074274 DOI: 10.1039/d0cp03779f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the effects of paramagnetic (PM) fluctuations on the thermochemistry of the MnO(100) surface in the oxygen evolution reaction (OER) using the "noncollinear magnetic sampling method plus U" (NCMSM+U). Various physical properties, such as the electronic structure, free energy, and charge occupation, of the MnO(100) surface in the PM state with several OER intermediates, were reckoned and compared to those in the antiferromagnetic (AFM) state. We found that PM fluctuation enhances charge transfer from a surface Mn ion to each of the intermediates and strengthens the chemical bond between them, while not altering the overall features, such as the rate determining step and resting state, in reaction pathways. The enhanced charge transfer can be attributed to the delocalized nature of valence bands observed in the PM surface. In addition, it was observed that chemical-bond enhancement depends on the intermediates, resulting in significant deviations in reaction energy barriers. Our study suggests that PM fluctuations play a significant role in the thermochemistry of chemical reactions occurring on correlated oxide surfaces.
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Affiliation(s)
- Sangmoon Yoon
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Korea. and Department of Physics, Kyung Hee University, Seoul, 02447, Korea.
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Korea.
| | - Sangmin Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Korea.
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Korea.
| | - Miyoung Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Korea.
| | - Young-Kyun Kwon
- Department of Physics, Kyung Hee University, Seoul, 02447, Korea.
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21
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Cho KH, Park S, Seo H, Choi S, Lee MY, Ko C, Nam KT. Capturing Manganese Oxide Intermediates in Electrochemical Water Oxidation at Neutral pH by In Situ Raman Spectroscopy. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014551] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kang Hee Cho
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Sunghak Park
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Seungwoo Choi
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Moo Young Lee
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Changwan Ko
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
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22
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Cho KH, Park S, Seo H, Choi S, Lee MY, Ko C, Nam KT. Capturing Manganese Oxide Intermediates in Electrochemical Water Oxidation at Neutral pH by In Situ Raman Spectroscopy. Angew Chem Int Ed Engl 2021; 60:4673-4681. [PMID: 33417273 DOI: 10.1002/anie.202014551] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Indexed: 01/17/2023]
Abstract
Electrochemical water splitting is a promising means to produce eco-friendly hydrogen fuels. Inspired by the Mn4 CaO5 cluster in nature, substantial works have been performed to develop efficient manganese (Mn)-based heterogeneous catalysts. Despite improvements in catalytic activity, the underlying mechanism of the oxygen evolution reaction (OER) is not completely elucidated owing to the lack of direct spectroscopic evidence for the active Mn-oxo moieties. We identify water oxidation intermediates on the surface of Mn3 O4 nanoparticles (NPs) in the OER at neutral pH by in situ Raman spectroscopy. A potential-dependent Raman peak was detected at 760 cm-1 and assigned to the active MnIV =O species generated during water oxidation. Isotope-labeling experiments combined with scavenger experiments confirmed the generation of surface terminal MnIV =O intermediates in the Mn-oxide NPs. This study provides an insight into the design of systems for the observation of reaction intermediates.
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Affiliation(s)
- Kang Hee Cho
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Seungwoo Choi
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Moo Young Lee
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Changwan Ko
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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23
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Wang P, Yan Y, Cao J, Feng J, Qi J. Surface activation towards manganese dioxide nanosheet arrays via plasma engineering as cathode and anode for efficient water splitting. J Colloid Interface Sci 2020; 586:95-102. [PMID: 33162037 DOI: 10.1016/j.jcis.2020.10.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/17/2020] [Accepted: 10/19/2020] [Indexed: 10/23/2022]
Abstract
Developing high-efficiency, low-cost electrocatalysts for water splitting is important but challenging. Two-dimensional nanosheet manganese dioxide (MnO2) arrays are promising candidates for the design and development of advanced catalysts because of their large surface area. Here, a feasible solution to improve the catalytic activity of MnO2 materials via decorating the active sites on the surface is proposed. With the help of plasma engineering, we successfully enabled surface activity of the MnO2 nanosheets by decorating P or Fe species together with rich vacancies on the surface. The decorated P (P-MnO2) or Fe (Fe-MnO2) species were highly beneficial for the absorption of protons and OH- respectively, and rich oxygen vacancies induced the formation of stable Mn3+, which contributed to electron and charge transfer. Thus, increased electrochemically active specific areas, accelerated charge transfer, and a proper surface electronic structure could be achieved. On the basis of this activation strategy, the fabricated P-MnO2 and Fe-MnO2 showed excellent catalytic performance for the hydrogen evolution and oxygen evolution reactions. To our knowledge, the performance of P-MnO2 and Fe-MnO2 outperformed most MnO2-based electrocatalysts in the field of electrocatalytic water splitting. Surface activation of two-dimensional MnO2 materials by decorating active species via plasma treatment can provide a feasible route for modulating the performance of earth-abundant electrocatalysts for practical applications.
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Affiliation(s)
- Pengcheng Wang
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
| | - Yaotian Yan
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
| | - Jian Cao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China
| | - Jicai Feng
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
| | - Junlei Qi
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China.
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24
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Park S, Jin K, Lim HK, Kim J, Cho KH, Choi S, Seo H, Lee MY, Lee YH, Yoon S, Kim M, Kim H, Kim SH, Nam KT. Spectroscopic capture of a low-spin Mn(IV)-oxo species in Ni-Mn 3O 4 nanoparticles during water oxidation catalysis. Nat Commun 2020; 11:5230. [PMID: 33067446 PMCID: PMC7567882 DOI: 10.1038/s41467-020-19133-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 09/30/2020] [Indexed: 11/22/2022] Open
Abstract
High-valent metal-oxo moieties have been implicated as key intermediates preceding various oxidation processes. The critical O-O bond formation step in the Kok cycle that is presumed to generate molecular oxygen occurs through the high-valent Mn-oxo species of the water oxidation complex, i.e., the Mn4Ca cluster in photosystem II. Here, we report the spectroscopic characterization of new intermediates during the water oxidation reaction of manganese-based heterogeneous catalysts and assign them as low-spin Mn(IV)-oxo species. Recently, the effects of the spin state in transition metal catalysts on catalytic reactivity have been intensely studied; however, no detailed characterization of a low-spin Mn(IV)-oxo intermediate species currently exists. We demonstrate that a low-spin configuration of Mn(IV), S = 1/2, is stably present in a heterogeneous electrocatalyst of Ni-doped monodisperse 10-nm Mn3O4 nanoparticles via oxo-ligand field engineering. An unprecedented signal (g = 1.83) is found to evolve in the electron paramagnetic resonance spectrum during the stepwise transition from the Jahn-Teller-distorted Mn(III). In-situ Raman analysis directly provides the evidence for Mn(IV)-oxo species as the active intermediate species. Computational analysis confirmed that the substituted nickel species induces the formation of a z-axis-compressed octahedral C4v crystal field that stabilizes the low-spin Mn(IV)-oxo intermediates.
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Affiliation(s)
- Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Nano Systems Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyung Kyu Lim
- Division of Chemical Engineering and Bioengineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Jin Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul, 03759, Republic of Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seungwoo Choi
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Moo Young Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yoon Ho Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sangmoon Yoon
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Miyoung Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyungjun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Sun Hee Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul, 03759, Republic of Korea.
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
- Nano Systems Institute, Seoul National University, Seoul, 08826, Republic of Korea.
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25
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Thangasamy P, Oh S, Nam S, Randriamahazaka H, Oh IK. Ferrocene-Incorporated Cobalt Sulfide Nanoarchitecture for Superior Oxygen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001665. [PMID: 32597017 DOI: 10.1002/smll.202001665] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/17/2020] [Indexed: 06/11/2023]
Abstract
Here, ferrocene(Fc)-incorporated cobalt sulfide (Cox Sy ) nanostructures directly grown on carbon nanotube (CNT) or carbon fiber (CF) networks for electrochemical oxygen evolution reaction (OER) using a facile one-step solvothermal method are reported. The strong synergistic interaction between Fc-Cox Sy nanostructures and electrically conductive CNTs results in the superior electrocatalytic activity with a very small overpotential of ≈304 mV at 10 mA cm-2 and a low Tafel slope of 54.2 mV dec-1 in 1 m KOH electrolyte. Furthermore, the Fc-incorporated Cox Sy (FCoS) nanostructures are directly grown on the acid pretreated carbon fiber (ACF), and the resulting fabricated electrode delivers excellent OER performance with a low overpotential of ≈315 mV at 10 mA cm-2 . Such superior OER catalytic activity can be attributed to 3D Fc-Cox Sy nanoarchitectures that consist of a high concentration of vertical nanosheets with uniform distribution of nanoparticles that afford a large number of active surface areas and edge sites. Besides, the tight contact interface between ACF substrate and Fc-Cox Sy nanostructures could effectively facilitate the electron transfer rate in the OER. This study provides valuable insights for the rational design of energy storage and conversion materials by the incorporation of other transition metal into metal sulfide/oxide nanostructures utilizing metallocene.
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Affiliation(s)
- Pitchai Thangasamy
- National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Saewoong Oh
- National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Sanghee Nam
- National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | | | - Il-Kwon Oh
- National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
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26
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Kim J, Park S, Go YK, Jin K, Kim Y, Nam KT, Kim SH. Probing the Structure and Binding Mode of EDTA on the Surface of Mn 3O 4 Nanoparticles for Water Oxidation by Advanced Electron Paramagnetic Resonance Spectroscopy. Inorg Chem 2020; 59:8846-8854. [PMID: 32501692 DOI: 10.1021/acs.inorgchem.0c00611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Identification of the surface structure of nanoparticles is important for understanding the catalytic mechanism and improving the properties of the particles. Here, we provide a detailed description of the coordination modes of ethylenediaminetetraacetate (EDTA) on Mn3O4 nanoparticles at the atomic level, as obtained by advanced electron paramagnetic resonance (EPR) spectroscopy. Binding of EDTA to Mn3O4 leads to dramatic changes in the EPR spectrum, with a 5-fold increase in the axial zero-field splitting parameter of Mn(II). This indicates significant changes in the coordination environment of the Mn(II) site; hence, the binding of EDTA causes a profound change in the electronic structure of the manganese site. Furthermore, the electron spin echo envelope modulation results reveal that two 14N atoms of EDTA are directly coordinated to the Mn site and a water molecule is coordinated to the surface of the nanoparticles. An Fourier transform infrared spectroscopy study shows that the Ca(II) ion is coordinated to the carboxylic ligands via the pseudobridging mode. The EPR spectroscopic results provide an atomic picture of surface-modified Mn3O4 nanoparticles for the first time. These results can enhance our understanding of the rational design of catalysts, for example, for the water oxidation reaction.
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Affiliation(s)
- Jin Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul 03759, Republic of Korea
| | - Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoo Kyung Go
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul 03759, Republic of Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Yujeong Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul 03759, Republic of Korea.,Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Sun Hee Kim
- Western Seoul Center, Korea Basic Science Institute (KBSI), Seoul 03759, Republic of Korea.,Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
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27
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Dong Y, Oloman CW, Gyenge EL, Su J, Chen L. Transition metal based heterogeneous electrocatalysts for the oxygen evolution reaction at near-neutral pH. NANOSCALE 2020; 12:9924-9934. [PMID: 32364205 DOI: 10.1039/d0nr02187c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The oxygen evolution reaction (OER) is considered as a major bottleneck of water splitting for hydrogen generation. It is highly desired to develop high performance OER catalysts in near-neutral operating environments because of mild corrosion and pollution. This review summarized the recent development of heterogeneous catalysts containing transition metals (TM) for the OER at near-neutral pH. Specifically, we focus on some effective strategies to achieve a high OER performance for TM (e.g., Co, Mn, Ni, Cu, Fe, and binary TM)-based catalysts in near-neutral media. The progress and perspectives are discussed, which might provide some insights into the rapid promotion of the electrocatalytic performance for future applications in hydrogen production.
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Affiliation(s)
- Yan Dong
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P.R. China.
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28
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Chinnadurai D, Nallal M, Kim H, Li OL, Park KH, Prabakar K. Mn
3+
Active Surface Site Enriched Manganese Phosphate Nano‐polyhedrons for Enhanced Bifunctional Oxygen Electrocatalyst. ChemCatChem 2020. [DOI: 10.1002/cctc.202000164] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Deviprasath Chinnadurai
- Department of Electrical EngineeringPusan National University 2 Busandaehak-ro 63beon-gil Geumjeong-gu, Busan 46241 (Republic of Korea
| | - Muthuchamy Nallal
- Department of ChemistryPusan National University 2 Busandaehak-ro, 63 beon-gil Geumjeong-gu, Busan 46241 (Republic of Korea
| | - Hee‐Je Kim
- Department of Electrical EngineeringPusan National University 2 Busandaehak-ro 63beon-gil Geumjeong-gu, Busan 46241 (Republic of Korea
| | - Oi Lun Li
- School of Materials Science and EngineeringPusan National University 2 Busandaehak-ro 63 beon-gil Geumjeong-gu, Busan 46241 (Republic of Korea
| | - Kang Hyun Park
- Department of ChemistryPusan National University 2 Busandaehak-ro, 63 beon-gil Geumjeong-gu, Busan 46241 (Republic of Korea
| | - Kandasamy Prabakar
- Department of Electrical EngineeringPusan National University 2 Busandaehak-ro 63beon-gil Geumjeong-gu, Busan 46241 (Republic of Korea
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29
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Melder J, Bogdanoff P, Zaharieva I, Fiechter S, Dau H, Kurz P. Water-Oxidation Electrocatalysis by Manganese Oxides: Syntheses, Electrode Preparations, Electrolytes and Two Fundamental Questions. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2019-1491] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
The efficient catalysis of the four-electron oxidation of water to molecular oxygen is a central challenge for the development of devices for the production of solar fuels. This is equally true for artificial leaf-type structures and electrolyzer systems. Inspired by the oxygen evolving complex of Photosystem II, the biological catalyst for this reaction, scientists around the globe have investigated the possibility to use manganese oxides (“MnOx”) for this task. This perspective article will look at selected examples from the last about 10 years of research in this field. At first, three aspects are addressed in detail which have emerged as crucial for the development of efficient electrocatalysts for the anodic oxygen evolution reaction (OER): (1) the structure and composition of the “MnOx” is of central importance for catalytic performance and it seems that amorphous, MnIII/IV oxides with layered or tunnelled structures are especially good choices; (2) the type of support material (e.g. conducting oxides or nanostructured carbon) as well as the methods used to immobilize the MnOx catalysts on them greatly influence OER overpotentials, current densities and long-term stabilities of the electrodes and (3) when operating MnOx-based water-oxidizing anodes in electrolyzers, it has often been observed that the electrocatalytic performance is also largely dependent on the electrolyte’s composition and pH and that a number of equilibria accompany the catalytic process, resulting in “adaptive changes” of the MnOx material over time. Overall, it thus has become clear over the last years that efficient and stable water-oxidation electrolysis by manganese oxides can only be achieved if at least four parameters are optimized in combination: the oxide catalyst itself, the immobilization method, the catalyst support and last but not least the composition of the electrolyte. Furthermore, these parameters are not only important for the electrode optimization process alone but must also be considered if different electrode types are to be compared with each other or with literature values from literature. Because, as without their consideration it is almost impossible to draw the right scientific conclusions. On the other hand, it currently seems unlikely that even carefully optimized MnOx anodes will ever reach the superb OER rates observed for iridium, ruthenium or nickel-iron oxide anodes in acidic or alkaline solutions, respectively. So at the end of the article, two fundamental questions will be addressed: (1) are there technical applications where MnOx materials could actually be the first choice as OER electrocatalysts? and (2) do the results from the last decade of intensive research in this field help to solve a puzzle already formulated in 2008: “Why did nature choose manganese to make oxygen?”.
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Affiliation(s)
- Jens Melder
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF) , Albert-Ludwigs-Universität Freiburg , Albertstraße 21, 79104 Freiburg , Germany
| | - Peter Bogdanoff
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institute for Solar Fuels , 14109 Berlin , Germany
| | - Ivelina Zaharieva
- Freie Universität Berlin, Fachbereich Physik , Arnimallee 14, 14195 Berlin , Germany
| | - Sebastian Fiechter
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institute for Solar Fuels , 14109 Berlin , Germany
| | - Holger Dau
- Freie Universität Berlin, Fachbereich Physik , Arnimallee 14, 14195 Berlin , Germany
| | - Philipp Kurz
- Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF) , Albert-Ludwigs-Universität Freiburg , Albertstraße 21, 79104 Freiburg , Germany
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30
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Lee MY, Ha H, Cho KH, Seo H, Park S, Lee YH, Kwon SJ, Lee TW, Nam KT. Importance of Interfacial Band Structure between the Substrate and Mn3O4 Nanocatalysts during Electrochemical Water Oxidation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03831] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Moo Young Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Heonjin Ha
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoon Ho Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Sung-Joo Kwon
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Republic of Korea
| | - Tae-Woo Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
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31
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Shih MC, Jhang RH, Tsai YT, Huang CW, Hung YJ, Liao MY, Huang J, Chen CH. Discontinuity-Enhanced Thin Film Electrocatalytic Oxygen Evolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1903363. [PMID: 31608571 DOI: 10.1002/smll.201903363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/08/2019] [Indexed: 06/10/2023]
Abstract
Thin film electrocatalysts allow strong binding and intimate electrical contact with electrodes, rapid mass transfer during reaction, and are generally more durable than powder electrocatalysts, which is particularly beneficial for gas evolution reactions. In this work, using cobalt manganese oxyhydroxide, an oxygen evolution reaction (OER) electrocatalyst that can be grown directly on various electrodes as a model system, it is demonstrated that breaking a continuous film into discontinuous patches can significantly enhance the overall OER performance without sacrificing long-term stability even under elevated electrocatalytic stress. Discontinuous films with higher edge-to-area ratios exhibits reduced overpotentials, increased turnover frequency, and more pronounced current increase after electrochemical conditioning. Operando Raman spectroscopy studies during electrocatalysis reveal that the film edges require lower potential barrier for activation. Introducing discontinuity into thin film electrocatalysis can thus lead to the realization of high performance yet highly robust systems for harsh gas evolution reactions.
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Affiliation(s)
- Ming-Chi Shih
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Ren-Huai Jhang
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Ya-Ting Tsai
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Chia-Wei Huang
- Department of Photonics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Yung-Jr Hung
- Department of Photonics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Mei-Yi Liao
- Department of Applied Chemistry, National Pingtung University, Pingtung, 90004, Taiwan
| | - Jiaxing Huang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Chun-Hu Chen
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
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32
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Lim SY, Park S, Im SW, Ha H, Seo H, Nam KT. Chemically Deposited Amorphous Zn-Doped NiFeOxHy for Enhanced Water Oxidation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03544] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sung Yul Lim
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518000, People’s Republic of China
| | - Sunghak Park
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Sang Won Im
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Heonjin Ha
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
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33
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Baumung M, Kollenbach L, Xi L, Risch M. Undesired Bulk Oxidation of LiMn 2 O 4 Increases Overpotential of Electrocatalytic Water Oxidation in Lithium Hydroxide Electrolytes. Chemphyschem 2019; 20:2981-2988. [PMID: 31359564 PMCID: PMC6899966 DOI: 10.1002/cphc.201900601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/26/2019] [Indexed: 11/23/2022]
Abstract
Chemical and structural changes preceding electrocatalysis obfuscate the nature of the active state of electrocatalysts for the oxygen evolution reaction (OER), which calls for model systems to gain systematic insight. We investigated the effect of bulk oxidation on the overpotential of ink-casted LiMn2 O4 electrodes by a rotating ring-disk electrode (RRDE) setup and X-ray absorption spectroscopy (XAS) at the K shell core level of manganese ions (Mn-K edge). The cyclic voltammogram of the RRDE disk shows pronounced redox peaks in lithium hydroxide electrolytes with pH between 12 and 13.5, which we assign to bulk manganese redox based on XAS. The onset of the OER is pH-dependent on the scale of the reversible hydrogen electrode (RHE) with a Nernst slope of -40(4) mV/pH at -5 μA monitored at the RRDE ring. To connect this trend to catalyst changes, we develop a simple model for delithiation of LiMn2 O4 in LiOH electrolytes, which gives the same Nernst slope of delithiation as our experimental data, i. e., 116(25) mV/pH. From this data, we construct an ERHE -pH diagram that illustrates robustness of LiMn2 O4 against oxidation above pH 13.5 as also verified by XAS. We conclude that manganese oxidation is the origin of the increase of the OER overpotential at pH lower than 14 and also of the pH dependence on the RHE scale. Our work highlights that vulnerability to transition metal redox may lead to increased overpotentials, which is important for the design of stable electrocatalysts.
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Affiliation(s)
- Max Baumung
- Georg-August-Universität GöttingenInstitut für MaterialphysikFriedrich-Hund-Platz 137077GöttingenGermany
| | - Leon Kollenbach
- Georg-August-Universität GöttingenInstitut für MaterialphysikFriedrich-Hund-Platz 137077GöttingenGermany
| | - Lifei Xi
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHahn-Meitner-Platz 114109BerlinGermany
| | - Marcel Risch
- Georg-August-Universität GöttingenInstitut für MaterialphysikFriedrich-Hund-Platz 137077GöttingenGermany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHahn-Meitner-Platz 114109BerlinGermany
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34
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The evaluation of the long-term stability of α-MnO2 based OER electrocatalyst in neutral medium by using data processing approach. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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NiFeP nanocages Embedded in Melamine Sponge derived nitrogen doped porous carbon foam as an efficient oxygen evolution electrocatalyst. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.07.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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Gui L, Miao X, Lei C, Wang K, Zhou W, He B, Wang Q, Zhao L. Co 3+ -Rich Na 1.95 CoP 2 O 7 Phosphates as Efficient Bifunctional Catalysts for Oxygen Evolution and Reduction Reactions in Alkaline Solution. Chemistry 2019; 25:11007-11014. [PMID: 31237958 DOI: 10.1002/chem.201901848] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/07/2019] [Indexed: 01/08/2023]
Abstract
Implementing sustainable energy conversion and storage technologies is highly reliant on crucial oxygen electrocatalysis, such as the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). However, the pursuit of low cost, energetic efficient and robust bifunctional catalysts for OER and ORR remains a great challenge. Herein, the novel Na-ion-deficient Na2-x CoP2 O7 catalysts are proposed to efficiently electrocatalyze OER and ORR in alkaline solution. The engineering of Na-ion deficiency can tune the electronic structure of Co, and thus tailor the intrinsically electrocatalytic performance. Among the sodium cobalt phosphate catalysts, the Na1.95 CoP2 O7 (NCPO5) catalyst exhibits the lowest ΔE (EJ10,OER -EJ-1,ORR ) of only 0.86 V, which favorably outperforms most of the reported non-noble metal catalysts. Moreover, the Na-ion deficiency can stabilize the phase structure and morphology of NCPO5 during the OER and ORR processes. This study highlights the Na-ion deficient Na2-x CoP2 O7 as a promising class of low-cost, highly active and robust bifunctional catalysts for OER and ORR.
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Affiliation(s)
- Liangqi Gui
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Xiaoyun Miao
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Chengjun Lei
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Kailin Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Wei Zhou
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.,Zhejiang Institute, China University of Geosciences (Wuhan), Hangzhou, 311305, China.,Engineering Research Center of Nano-Geo Materials, of Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Beibei He
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.,Zhejiang Institute, China University of Geosciences (Wuhan), Hangzhou, 311305, China.,Engineering Research Center of Nano-Geo Materials, of Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Qing Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.,Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Ling Zhao
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.,Zhejiang Institute, China University of Geosciences (Wuhan), Hangzhou, 311305, China.,Engineering Research Center of Nano-Geo Materials, of Ministry of Education, China University of Geosciences, Wuhan, 430074, China
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37
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Gajaganti S, Kumar D, Singh S, Srivastava V, Allam BK. A New Avenue to the Synthesis of Symmetrically Substituted Pyridines Catalyzed by Magnetic Nano–Fe
3
O
4
: Methyl Arenes as Sustainable Surrogates of Aryl Aldehydes. ChemistrySelect 2019. [DOI: 10.1002/slct.201900289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Somaiah Gajaganti
- Department of ChemistryIndian Institute of Technology (BHU) Varanasi 221 005, Uttar Pradesh India
| | - Dhirendra Kumar
- Department of ChemistryIndian Institute of Technology (BHU) Varanasi 221 005, Uttar Pradesh India
| | - Sundaram Singh
- Department of ChemistryIndian Institute of Technology (BHU) Varanasi 221 005, Uttar Pradesh India
| | - Vandana Srivastava
- Department of ChemistryIndian Institute of Technology (BHU) Varanasi 221 005, Uttar Pradesh India
| | - Bharat Kumar Allam
- Department of ChemistryIndian Institute of Technology (BHU) Varanasi 221 005, Uttar Pradesh India
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38
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Singh C, Liberman I, Shimoni R, Ifraemov R, Hod I. Pristine versus Pyrolyzed Metal-Organic Framework-based Oxygen Evolution Electrocatalysts: Evaluation of Intrinsic Activity Using Electrochemical Impedance Spectroscopy. J Phys Chem Lett 2019; 10:3630-3636. [PMID: 31194556 DOI: 10.1021/acs.jpclett.9b01232] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Metal-organic frameworks (MOFs) have emerged as outstanding electrocatalysts for water oxidation. Commonly, MOFs are utilized for electrocatalytic water oxidation either in pristine or pyrolyzed form. Yet, despite significant advancements in their catalytic performance, further improvement requires new insights on the parameters influencing MOF-based catalysts activity. Here, we have conducted a detailed comparison between the intrinsic electrocatalytic properties of pristine and pyrolyzed Ni-Fe-based MOFs. Interestingly, although pristine MOF exhibits the maximum overall electrocatalytic performance, apparent turnover frequency (TOF) values (intrinsic activity) of all pyrolyzed MOFs exceeded the one of pristine MOF. Moreover, an upper-limit estimation of TOF was extracted using electrochemical impedance spectroscopy (EIS), by excluding IR-drops linked with the electrochemical cell. By doing so, EIS-extracted TOF values were 10-times higher compared to the apparent TOFs. Accordingly, a great leap in performance should still be expected for these catalysts, by designing conductive MOF-platforms having larger pore-diameters to reduce mass-transport limitations.
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Affiliation(s)
- Chanderpratap Singh
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology , Ben-Gurion University of Negev , Beer-Sheva 8410501 , Israel
| | - Itamar Liberman
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology , Ben-Gurion University of Negev , Beer-Sheva 8410501 , Israel
| | - Ran Shimoni
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology , Ben-Gurion University of Negev , Beer-Sheva 8410501 , Israel
| | - Raya Ifraemov
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology , Ben-Gurion University of Negev , Beer-Sheva 8410501 , Israel
| | - Idan Hod
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology , Ben-Gurion University of Negev , Beer-Sheva 8410501 , Israel
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39
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Lee HJ, Back S, Lee JH, Choi SH, Jung Y, Choi JW. Mixed Transition Metal Oxide with Vacancy-Induced Lattice Distortion for Enhanced Catalytic Activity of Oxygen Evolution Reaction. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01298] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hyeon Jeong Lee
- School of Chemical and Biological Engineering and Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Seoin Back
- Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ji Hoon Lee
- Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sun Hee Choi
- Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), 80 Jigokro-127-beongil, Nam-gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Yousung Jung
- Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jang Wook Choi
- School of Chemical and Biological Engineering and Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
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40
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Yan B, Bisbey RP, Alabugin A, Surendranath Y. Mixed Electron–Proton Conductors Enable Spatial Separation of Bond Activation and Charge Transfer in Electrocatalysis. J Am Chem Soc 2019; 141:11115-11122. [DOI: 10.1021/jacs.9b03327] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Bing Yan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Ryan P. Bisbey
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Alexander Alabugin
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yogesh Surendranath
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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41
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Hu Y, Zhang Y, Li C, Wang L, Du Y, Mo G, Li X, Cheetham AK, Wang J. Guided Assembly of Microporous/Mesoporous Manganese Phosphates by Bifunctional Organophosphonic Acid Etching and Templating. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1901124. [PMID: 31062894 DOI: 10.1002/adma.201901124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/03/2019] [Indexed: 06/09/2023]
Abstract
Manganese (Mn)-based compounds are important materials for both energy conversion and energy storage. Unfortunately, it has been a significant challenge to develop highly ordered microporous/mesoporous structures for them to provide more active sites for these applications. In order to do so using the soft-templating method, three conditions have to be met, namely, a strong interaction between the inorganic precursor and the organic templates; eliminating the formation of bulk manganese phosphate; and the preservation of the manganese phosphate framework without it collapsing upon template removal. Herein, a soft-templating approach is reported using an organophosphonic acid (n-hexylphosphonic acid) as both the etching and the templating agent, followed by high-vacuum-assisted annealing. This approach simultaneously satisfies the above conditions. Both microporous and mesoporous manganese phosphates with uniform pore sizes and well-defined pore structures are obtained. The utilization of the organophosphonic acid is shown to be the key in the transformation from bulk manganese oxide into a highly ordered microporous phosphate. A very high surface area of 304.1 m2 g-1 is obtained for the microporous manganese phosphate, which is the highest among the reported values for Mn-based compounds. The ultrafine micropores and high specific surface area of our manganese phosphate promote electrocatalytic activity for the oxygen evolution reaction.
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Affiliation(s)
- Yating Hu
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Yu Zhang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore
| | - Changjian Li
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Ling Wang
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - Yonghua Du
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore, 627833, Singapore
| | - Guang Mo
- Beijing Synchrotron Energy Physics, Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing, 19B Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Xu Li
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore
| | - Anthony K Cheetham
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
| | - John Wang
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
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42
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Hayashi T, Bonnet-Mercier N, Yamaguchi A, Suetsugu K, Nakamura R. Electrochemical characterization of manganese oxides as a water oxidation catalyst in proton exchange membrane electrolysers. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190122. [PMID: 31218053 PMCID: PMC6549974 DOI: 10.1098/rsos.190122] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/24/2019] [Indexed: 05/25/2023]
Abstract
The performance of four polymorphs of manganese (Mn) dioxides as the catalyst for the oxygen evolution reaction (OER) in proton exchange membrane (PEM) electrolysers was examined. The comparison of the activity between Mn oxides/carbon (Mn/C), iridium oxide/carbon (Ir/C) and platinum/carbon (Pt/C) under the same condition in PEM electrolysers showed that the γ-MnO2/C exhibited a voltage efficiency for water electrolysis comparable to the case with Pt/C, while lower than the case with the benchmark Ir/C OER catalyst. The rapid decrease in the voltage efficiency was observed for a PEM electrolyser with the Mn/C, as indicated by the voltage shift from 1.7 to 1.9 V under the galvanostatic condition. The rapid deactivation was also observed when Pt/C was used, indicating that the instability of PEM electrolysis with Mn/C is probably due to the oxidative decomposition of carbon supports. The OER activity of the four types of Mn oxides was also evaluated at acidic pH in a three-electrode system. It was found that the OER activity trends of the Mn oxides evaluated in an acidic aqueous electrolyte were distinct from those in PEM electrolysers, demonstrating the importance of the evaluation of OER catalysts in a real device condition for future development of noble-metal-free PEM electrolysers.
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Affiliation(s)
- Toru Hayashi
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Nadège Bonnet-Mercier
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Akira Yamaguchi
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | | | - Ryuhei Nakamura
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science (CSRS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Earth-Life Science Institute (ELSI), Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-0033, Japan
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43
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Jin K, Maalouf JH, Lazouski N, Corbin N, Yang D, Manthiram K. Epoxidation of Cyclooctene Using Water as the Oxygen Atom Source at Manganese Oxide Electrocatalysts. J Am Chem Soc 2019; 141:6413-6418. [PMID: 30963761 DOI: 10.1021/jacs.9b02345] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Epoxides are useful intermediates for the manufacture of a diverse set of chemical products. Current routes of olefin epoxidation either involve hazardous reagents or generate stoichiometric side products, leading to challenges in separation and significant waste streams. Here, we demonstrate a sustainable and safe route to epoxidize olefin substrates using water as the oxygen atom source at room temperature and ambient pressure. Manganese oxide nanoparticles (NPs) are shown to catalyze cyclooctene epoxidation with Faradaic efficiencies above 30%. Isotopic studies and detailed product analysis reveal an overall reaction in which water and cyclooctene are converted to cyclooctene oxide and hydrogen. Electrokinetic studies provide insights into the mechanism of olefin epoxidation, including an approximate first-order dependence on the substrate and water and a rate-determining step which involves the first electron transfer. We demonstrate that this new route can also achieve a cyclooctene conversion of ∼50% over 4 h.
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Affiliation(s)
- Kyoungsuk Jin
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Joseph H Maalouf
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Nikifar Lazouski
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Nathan Corbin
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Dengtao Yang
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Karthish Manthiram
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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44
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Li A, Ooka H, Bonnet N, Hayashi T, Sun Y, Jiang Q, Li C, Han H, Nakamura R. Stable Potential Windows for Long‐Term Electrocatalysis by Manganese Oxides Under Acidic Conditions. Angew Chem Int Ed Engl 2019; 58:5054-5058. [DOI: 10.1002/anie.201813361] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/19/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Ailong Li
- State Key Laboratory of Catalysis & Division of Solar EnergyDalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics, CAS Dalian 116023 China
- Biofunctional Catalyst Research TeamRIKEN Center for Sustainable Resource Science (CSRS) 2-1 Hirosawa Wako Saitama 351-0198 Japan
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Hideshi Ooka
- Biofunctional Catalyst Research TeamRIKEN Center for Sustainable Resource Science (CSRS) 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Nadège Bonnet
- Biofunctional Catalyst Research TeamRIKEN Center for Sustainable Resource Science (CSRS) 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Toru Hayashi
- Biofunctional Catalyst Research TeamRIKEN Center for Sustainable Resource Science (CSRS) 2-1 Hirosawa Wako Saitama 351-0198 Japan
- Department of Applied ChemistrySchool of EngineeringThe University of Tokyo 7-3-1, Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Yimeng Sun
- State Key Laboratory of Catalysis & Division of Solar EnergyDalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics, CAS Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Qike Jiang
- State Key Laboratory of Catalysis & Division of Solar EnergyDalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics, CAS Dalian 116023 China
| | - Can Li
- State Key Laboratory of Catalysis & Division of Solar EnergyDalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics, CAS Dalian 116023 China
| | - Hongxian Han
- State Key Laboratory of Catalysis & Division of Solar EnergyDalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics, CAS Dalian 116023 China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Ryuhei Nakamura
- Biofunctional Catalyst Research TeamRIKEN Center for Sustainable Resource Science (CSRS) 2-1 Hirosawa Wako Saitama 351-0198 Japan
- Earth-Life Science Institute (ELSI)Tokyo Institute of Technology 2-12-1-I7E Ookayama, Meguro-ku Tokyo 152-8550 Japan
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45
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Ha H, Jin K, Park S, Lee KG, Cho KH, Seo H, Ahn HY, Lee YH, Nam KT. Highly Selective Active Chlorine Generation Electrocatalyzed by Co 3O 4 Nanoparticles: Mechanistic Investigation through in Situ Electrokinetic and Spectroscopic Analyses. J Phys Chem Lett 2019; 10:1226-1233. [PMID: 30816050 DOI: 10.1021/acs.jpclett.9b00547] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The reaction mechanism of electrochemical chloride oxidation at neutral pH is different from that at acidic pH, in which a commercial chlor-alkali process has been developed. Different proton concentrations and accelerated hydrolysis of the generated chlorine into hypochlorous acid at high pH can change the electrokinetics and stability of reaction intermediates. We have investigated a unique reaction mechanism of Co3O4 nanoparticles for chloride oxidation at neutral pH. In contrast with water oxidation, the valency of cobalt was not changed during chloride oxidation. Interestingly, a new intermediate of Co-Cl was captured spectroscopically, distinct from the reaction intermediate at acidic pH. In addition, Co3O4 nanoparticles exhibited high selectivity for active chlorine generation at neutral pH, comparable to commercially available RuO2-based catalysts. We believe that this study provides insight into designing efficient electrocatalysts for active chlorine generation at neutral pH, which can be practically applied to electrochemical water treatment coupled to hydrogen production.
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Affiliation(s)
- Heonjin Ha
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Sunghak Park
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kang-Gyu Lee
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Hyo-Yong Ahn
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Yoon Ho Lee
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
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46
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Stable Potential Windows for Long‐Term Electrocatalysis by Manganese Oxides Under Acidic Conditions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813361] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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47
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Sun Z, Yuan M, Yang H, Lin L, Jiang H, Ge S, Li H, Sun G, Ma S, Yang X. 3D Porous Amorphous γ-CrOOH on Ni Foam as Bifunctional Electrocatalyst for Overall Water Splitting. Inorg Chem 2019; 58:4014-4018. [DOI: 10.1021/acs.inorgchem.9b00112] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Zemin Sun
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Mengwei Yuan
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Han Yang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Liu Lin
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Heyun Jiang
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Shengsong Ge
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Huifeng Li
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Genban Sun
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Shulan Ma
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiaojing Yang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
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48
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Lee YH, Park S, Lee K, Lee MY, Cho KH, Kim SJ, Nam KT. Methylamine Treated Mn3O4Nanoparticles as a Highly Efficient Water Oxidation Catalyst under Neutral Condition. ChemCatChem 2019. [DOI: 10.1002/cctc.201900055] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yoon Ho Lee
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
| | - Sunghak Park
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
| | - Kang‐Gyu Lee
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
| | - Moo Young Lee
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
| | - Kang Hee Cho
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
| | - Sung Jin Kim
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and EngineeringSeoul National University Seoul 151-744 Republic of Korea
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49
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Yoon S, Kang SH, Lee S, Kim K, Song JP, Kim M, Kwon YK. A "non-dynamical" way of describing room-temperature paramagnetic manganese oxide. Phys Chem Chem Phys 2019; 21:15932-15939. [PMID: 31094381 DOI: 10.1039/c9cp00280d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We present a new approach based on static density functional theory (DFT) to describe paramagnetic manganese oxides, representative paramagnetic Mott insulators. We appended spin noncollinearity and a canonical ensemble to the magnetic sampling method (MSM), which is one of the supercell approaches based on the disordered local moment model. The combination of the noncollinear MSM (NCMSM) with DFT+U represents a highly favorable computational method called NCMSM+U to accurately determine the paramagnetic properties of MnO with moderate numerical cost. The effects of electron correlations and spin noncollinearity on the properties of MnO were also investigated. We found that the spin noncollinearity plays an important role in determining the detailed electronic profile and precise energetics of paramagnetic MnO. Our results illustrate that the NCMSM+U approach may be used for insulating materials as an alternative to the ab initio framework of dynamic mean field theory based on DFT in the simulation of the room-temperature paramagnetic properties.
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Affiliation(s)
- Sangmoon Yoon
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Korea.
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50
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Selvakumar K, Kumar SMS, Thangamuthu R, Rajput P, Bhattacharyya D, Jha SN. 2D and 3D Silica‐Template‐Derived MnO
2
Electrocatalysts towards Enhanced Oxygen Evolution and Oxygen Reduction Activity. ChemElectroChem 2018. [DOI: 10.1002/celc.201801143] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Karuppiah Selvakumar
- Materials Electrochemistry DivisionCSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | | | - Rangasamy Thangamuthu
- Materials Electrochemistry DivisionCSIR-Central Electrochemical Research Institute Karaikudi, Tamil Nadu 630 003 India
| | - Parasmani Rajput
- Atomic & Molecular Physics DivisionBhabha Atomic Research Center Trombay Mumbai- 400 085 India
| | - Dibyendu Bhattacharyya
- Atomic & Molecular Physics DivisionBhabha Atomic Research Center Trombay Mumbai- 400 085 India
| | - Shambhu Nath Jha
- Atomic & Molecular Physics DivisionBhabha Atomic Research Center Trombay Mumbai- 400 085 India
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