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Hydroxylated high-entropy alloy as highly efficient catalyst for electrochemical oxygen evolution reaction

羟基化高熵合金用作电化学析氧反应高效催化剂

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摘要

高熵合金(HEA)不仅是有潜力的电化学析氧反应的催化剂, 也可以用作电催化剂的载体. 本文采用HF处理高熵合金使其羟基 化(HF-HEA), 然后再进行原位电化学活化, 从而得到一种新型高 效的CoCrFeNiAl HEA负载的Co,Fe,Ni-(O)OH电催化剂. 该电催化 剂仅用240 mV超电势就可产生10 mA cm−2 的电流密度, Tafel斜率 为52.7 mV dec−1. 本研究发现Cr和Al促进了HEA/Co,Fe,Ni-(O)OH 的电化学活性. Cr和Al不仅增加了HF-HEA 表面Ni(OH)x/NiOOH 的Ni3+/Ni2+摩尔比例, 而且在电化学活化过程中Cr3+和Al3+的溶出 增加了HF-HEA的电化学活性表面积.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51521001 and 51832003), the Fundamental Research Funds for the Central Universities (WUT: 2019IB002) and the Students Innovation and Entrepreneurship Training Program (2019-C-B1-25).

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Authors and Affiliations

  1. School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, China

    Peiyan Ma  (马培艳), Shichao Zhang  (张世超), Mutian Zhang  (张沐天) & Long Zhang  (张龙)

  2. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China

    Junfeng Gu  (顾俊峰), Yuchen Sun  (孙玉晨), Wei Ji  (季伟) & Zhengyi Fu  (傅正义)

Authors
  1. Peiyan Ma  (马培艳)
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  2. Shichao Zhang  (张世超)
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  3. Mutian Zhang  (张沐天)
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  4. Junfeng Gu  (顾俊峰)
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  5. Long Zhang  (张龙)
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  6. Yuchen Sun  (孙玉晨)
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  7. Wei Ji  (季伟)
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  8. Zhengyi Fu  (傅正义)
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Contributions

Fu Z and Ji W provided the research proposal and other authors completed the experiments. Ma P wrote the paper with support from Gu J. All authors contributed to the general discussion.

Corresponding authors

Correspondence to Wei Ji  (季伟) or Zhengyi Fu  (傅正义).

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Conflict of interest

The authors declare no conflict of interest.

Supplementary information

Experimental details and supporting data are available in the online version of the paper.

Peiyan Ma is currently an associate professor at the School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology. Her research interests include electrocatalytic and photoelectrochemical H2 evolution, inorganic nanomaterials and HEAs.

Wei Ji is currently an associate professor at the State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology. His current research interests include HEAs and structure/function integration composites, etc.

Zhengyi Fu is the director of the State Kay Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology and a Cheung Kong Scholar of the Ministry of Education of China. His research is focused on multifunctional ceramics and ceramic-based composites, structural/functional integrative composites, novel material structures and properties, in-situ reaction synthesis and processing, fast and ultra-fast sintering, bioprocess-inspired synthesis and fabrication.

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Ma, P., Zhang, S., Zhang, M. et al. Hydroxylated high-entropy alloy as highly efficient catalyst for electrochemical oxygen evolution reaction. Sci. China Mater. 63, 2613–2619 (2020). https://doi.org/10.1007/s40843-020-1461-2

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  • DOI: https://doi.org/10.1007/s40843-020-1461-2

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