Applied Catalysis2022，Vol.3049.DOI:10.1016/j.apcatb.2021.120986

Deeply self-reconstructing CoFe(H3O)(PO4)(2) to low-crystalline Fe0.5Co0.5OOH with Fe3+-O-Fe3+ motifs for oxygen evolution reaction

Ye, Shenghua Lei, Yaqi Xu, Tingting Zheng, Lirong Chen, Zhida Ren, Xiangzhong Li, Yongliang Zhang, Qianling Liu, Jianhong Yang, Xiuyuan
Applied Catalysis2022，Vol.3049.DOI:10.1016/j.apcatb.2021.120986
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  • NSTL
  • Elsevier

Deeply self-reconstructing CoFe(H3O)(PO4)(2) to low-crystalline Fe0.5Co0.5OOH with Fe3+-O-Fe3+ motifs for oxygen evolution reaction

Ye, Shenghua 1Lei, Yaqi 1Xu, Tingting 1Zheng, Lirong 2Chen, Zhida 1Ren, Xiangzhong 1Li, Yongliang 1Zhang, Qianling 1Liu, Jianhong 1Yang, Xiuyuan1
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作者信息

  • 1. Shenzhen Univ
  • 2. Inst High Energy Phys Chinese Acad Sci
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Abstract

In this study, phosphate FeCo(H3O)(PO4)(2) nanosheet arrays (NAs) were synthesized using an electrochemical strategy. FeCo(H3O)(PO4)(2) NAs as precatalyst could undergo significant self-reconstruction, including leaching of phosphate anions and electro-oxidation of Co2+ during anodizing at the potential range of oxygen evolution reaction (OER) in 1 M KOH solution, eventually resulting in the formation of Fe0.5Co0.5OOH NAs with low crystallinity. The high content of Fe in Fe0.5Co0.5OOH NAs promoted the formation of active Fe3+-O-Fe3+ motifs that increased OER occurrence. Additionally, Fe incorporation increased the ratio of the reaction rate constants of oxygen evolution to Co3+/Co4+ (k(OER)/k(M,ox)) and enhanced the reaction order on the hydroxyl ion. These factors significantly contributed to the outstanding OER catalytic performances of Fe0.5Co0.5OOH NAs.

Key words

Self-reconstruction/Fe/Phosphate/Oxyhydroxide/Oxygen evolution reaction/IRON-OXIDES/ARRAYS/FTIR

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量29
参考文献量49
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