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SCIENCE CHINA Materials, Volume 63 , Issue 12 : 2613-2619(2020) https://doi.org/10.1007/s40843-020-1461-2

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

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  • ReceivedMar 30, 2020
  • AcceptedJul 8, 2020
  • PublishedSep 10, 2020

Abstract


Funded by

the National Natural Science Foundation of China(51521001,51832003)

the Fundamental Research Funds for the Central Universities(WUT:,2019IB002)

the Students Innovation and Entrepreneurship Training Program(2019-C-B1-25)


Acknowledgment

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).


Interest statement

The authors declare no conflict of interest.


Contributions statement

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.


Author information

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.


Supplement

Supplementary information

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


References

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  • Figure 1

    Scanning electron microscopy (SEM) images of (a) the CoCrFeNiAl HEA precursor and (b) HF-HEA particles. (c) TEM image, (d) EDS layered image and (e1–e6) EDS element mappings of HF-HEA.

  • Figure 2

    (a) FTIR spectra of HEA precursor and HF-HEA. High-resolution XPS spectra of (b) Co 2p, (c) Ni 2p, (d) Fe 2p, (e) O 1s of HEA and HF-HEA. (f) XRD patterns of HEA and HF-HEA.

  • Figure 3

    (a) Polarization curves of HEA, HF-HEA and RuO2. (b) CV curves of HF-HEA and RuO2 before and after 1000 CV cycles activation. (c) Tafel slopes of HEA, HF-HEA, HF-HEA-a and RuO2. (d) Nyquist plots of HEA, HF-HEA and HF-HEA-a.

  • Figure 4

    (a) Cdl of HEA, HF-HEA and HF-HEA-a. (b) Current density versus time curve of HF-HEA-a at 1.47 V for OER. (c, d) TEM images of HF-HEA-a after stability test.

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