Ultrathin iron-cobalt oxides nanosheets with abundant oxygen vacancies for oxygen evolution reaction
Article
Article Title | Ultrathin iron-cobalt oxides nanosheets with abundant oxygen vacancies for oxygen evolution reaction |
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ERA Journal ID | 4865 |
Article Category | Article |
Authors | Zhuang, Linzhou (Author), Ge, Lei (Author), Yang, Yisu (Author), Li, Mengran (Author), Jia, Yi (Author), Yao, Xiangdong (Author) and Zhu, Zhonghua (Author) |
Journal Title | Advanced Materials |
Journal Citation | 29 (17), p. 1606793 |
Number of Pages | 7 |
Year | 2017 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 0935-9648 |
1521-4095 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/adma.201606793 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/adma.201606793/abstract |
Abstract | Electrochemical water splitting is a promising method for storing light/electrical energy in the form of H2 fuel; however, it is limited by the sluggish anodic oxygen evolution reaction (OER). To improve the accessibility of H2 production, it is necessary to develop an efficient OER catalyst with large surface area, abundant active sites, and good stability, through a low-cost fabrication route. Herein, a facile solution reduction method using NaBH4 as a reductant is developed to prepare iron-cobalt oxide nanosheets (FexCoy-ONSs) with a large specific surface area (up to 261.1 m2 g−1), ultrathin thickness (1.2 nm), and, importantly, abundant oxygen vacancies. The mass activity of Fe1Co1-ONS measured at an overpotential of 350 mV reaches up to 54.9 A g−1, while its Tafel slope is 36.8 mV dec−1; both of which are superior to those of commercial RuO2, crystalline Fe1Co1-ONP, and most reported OER catalysts. The excellent OER catalytic activity of Fe1Co1-ONS can be attributed to its specific structure, e.g., ultrathin nanosheets that could facilitate mass diffusion/transport of OH− ions and provide more active sites for OER catalysis, and oxygen vacancies that could improve electronic conductivity and facilitate adsorption of H2O onto nearby Co3+ sites. |
Keywords | oxygen evolution reaction;oxygen vacancies;sodium borohydride; ultrathin nanosheets |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
401605. Functional materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Griffith University | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) Grant ID DP130102151 |
Funding source | Australian Research Council (ARC) Grant ID DP170103317 |
Funding source | Australian Research Council (ARC) Grant ID FT120100720 |
https://research.usq.edu.au/item/q3y7w/ultrathin-iron-cobalt-oxides-nanosheets-with-abundant-oxygen-vacancies-for-oxygen-evolution-reaction
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