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Yang Y, Du X, Wang S, Zhao K, Wang L, Qi Z, Yang W, Hao J, Shi W. Cation Transport Effect on Nickel Iron Oxyhydroxide Electrodes in the Oxygen Evolution Reaction. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yonggang Yang
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | | | - Shuaishuai Wang
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | - Kun Zhao
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | - Ling Wang
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | - Zhihao Qi
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | - Wenshu Yang
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | - Jinhui Hao
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
| | - Weidong Shi
- School of Chemistry and Engineering, Jiangsu University, Zhenjiang212013, China
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Nocera DG. Proton-Coupled Electron Transfer: The Engine of Energy Conversion and Storage. J Am Chem Soc 2022; 144:1069-1081. [PMID: 35023740 DOI: 10.1021/jacs.1c10444] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Proton-coupled electron transfer (PCET) underpins energy conversion in chemistry and biology. Four energy systems are described whose discoveries are based on PCET: the water splitting chemistry of the Artificial Leaf, the carbon fixation chemistry of the Bionic Leaf-C, the nitrogen fixation chemistry of the Bionic Leaf-N and the Coordination Chemistry Flow Battery (CCFB). Whereas the Artificial Leaf, Bionic Leaf-C, and Bionic Leaf-N require strong coupling between electron and proton to reduce energetic barriers to enable high energy efficiencies, the CCFB requires complete decoupling of the electron and proton so as to avoid parasitic energy-wasting reactions. The proper design of PCET in these systems facilitates their implementation in the areas of (i) centralized large scale grid storage of electricity and (ii) decentralized energy storage/conversion using only sunlight, air and any water source to produce fuel and food within a sustainable cycle for the biogenic elements of C, N and P.
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Affiliation(s)
- Daniel G Nocera
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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Gao R, Deng M, Yan Q, Fang Z, Li L, Shen H, Chen Z. Structural Variations of Metal Oxide-Based Electrocatalysts for Oxygen Evolution Reaction. SMALL METHODS 2021; 5:e2100834. [PMID: 34928041 DOI: 10.1002/smtd.202100834] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/21/2021] [Indexed: 06/14/2023]
Abstract
Electrocatalytic oxygen evolution reaction (OER), an important electrode reaction in electrocatalytic and photoelectrochemical cells for a carbon-free energy cycle, has attracted considerable attention in the last few years. Metal oxides have been considered as good candidates for electrocatalytic OER because they can be easily synthesized and are relatively stable during the OER process. However, inevitable structural variations still occur to them due to the complex reaction steps and harsh working conditions of OER, thus impending the further insight into the catalytic mechanism and rational design of highly efficient electrocatalysts. The aim of this review is to disclose the current research progress toward the structural variations of metal oxide-based OER electrocatalysts. The origin of structural variations of metal oxides is discussed. Based on some typical oxides performing OER activity, the external and internal factors that influence the structural stability are summarized and then some general approaches to regulate the structural variation process are provided. Some operando methods are also concluded to monitor the structural variation processes and to identify the final active structure. Additionally, the unresolved problems and challenges are presented in an attempt to get further insight into the mechanism of structural variations and establish a rational structure-catalysis relationship.
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Affiliation(s)
- Ruiqin Gao
- School of Biological and Chemical Engineering, NingboTech University, No.1 South Qianhu Road, Ningbo, 315100, P. R. China
| | - Meng Deng
- School of Biological and Chemical Engineering, NingboTech University, No.1 South Qianhu Road, Ningbo, 315100, P. R. China
| | - Qing Yan
- School of Biological and Chemical Engineering, NingboTech University, No.1 South Qianhu Road, Ningbo, 315100, P. R. China
| | - Zhenxing Fang
- College of Science and Technology, Ningbo University, 521 Wenwei Road, Ningbo, 315100, P. R. China
| | - Lichun Li
- College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Roady, Hangzhou, 310032, P. R. China
| | - Haoyu Shen
- School of Biological and Chemical Engineering, NingboTech University, No.1 South Qianhu Road, Ningbo, 315100, P. R. China
| | - Zhengfei Chen
- School of Biological and Chemical Engineering, NingboTech University, No.1 South Qianhu Road, Ningbo, 315100, P. R. China
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Gao J, Tao H, Liu B. Progress of Nonprecious-Metal-Based Electrocatalysts for Oxygen Evolution in Acidic Media. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2003786. [PMID: 34169587 DOI: 10.1002/adma.202003786] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/29/2020] [Indexed: 06/13/2023]
Abstract
Water oxidation, or the oxygen evolution reaction (OER), which combines two oxygen atoms from two water molecules and releases one oxygen molecule, plays the key role by providing protons and electrons needed for the hydrogen generation, electrochemical carbon dioxide reduction, and nitrogen fixation. The multielectron transfer OER process involves multiple reaction intermediates, and a high overpotential is needed to overcome the sluggish kinetics. Among the different water splitting devices, proton exchange membrane (PEM) water electrolyzer offers greater advantages. However, current anode OER electrocatalysts in PEM electrolyzers are limited to precious iridium and ruthenium oxides. Developing highly active, stable, and precious-metal-free electrocatalysts for water oxidation in acidic media is attractive for the large-scale application of PEM electrolyzers. In recent years, various types of precious-metal-free catalysts such as carbon-based materials, earth-abundant transition metal oxides, and multiple metal oxide mixtures have been investigated and some of them show promising activity and stability for acidic OER. In this review, the thermodynamics of water oxidation, Pourbaix diagram of metal elements in aqueous solution, and theoretical screening and prediction of precious-metal-free electrocatalysts for acidic OER are first elaborated. The catalytic performance, reaction kinetics, and mechanisms together with future research directions regarding acidic OER are summarized and discussed.
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Affiliation(s)
- Jiajian Gao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Huabing Tao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, 361005, China
| | - Bin Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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Li N, Hadt RG, Hayes D, Chen LX, Nocera DG. Detection of high-valent iron species in alloyed oxidic cobaltates for catalysing the oxygen evolution reaction. Nat Commun 2021; 12:4218. [PMID: 34244515 PMCID: PMC8270959 DOI: 10.1038/s41467-021-24453-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 06/15/2021] [Indexed: 01/08/2023] Open
Abstract
Iron alloying of oxidic cobaltate catalysts results in catalytic activity for oxygen evolution on par with Ni-Fe oxides in base but at much higher alloying compositions. Zero-field 57Fe Mössbauer spectroscopy and X-ray absorption spectroscopy (XAS) are able to clearly identify Fe4+ in mixed-metal Co-Fe oxides. The highest Fe4+ population is obtained in the 40–60% Fe alloying range, and XAS identifies the ion residing in an octahedral oxide ligand field. The oxygen evolution reaction (OER) activity, as reflected in Tafel analysis of CoFeOx films in 1 M KOH, tracks the absolute concentration of Fe4+. The results reported herein suggest an important role for the formation of the Fe4+ redox state in activating cobaltate OER catalysts at high iron loadings. The capturing of high valent iron in a catalytic reaction is important but difficult task. Here, the authors report identification of a high-valent Fe(IV)-species with different spectroscopic tools such as Mössbauer spectroscopy and X-ray absorption spectroscopy during the course of an oxygen evolving reaction.
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Affiliation(s)
- Nancy Li
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Ryan G Hadt
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA. .,Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.
| | - Dugan Hayes
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA. .,Department of Chemistry, University of Rhode Island, Kingston, RI, USA.
| | - Lin X Chen
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA.,Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - Daniel G Nocera
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
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