Assessment issues on electrochemical catalysis for water splitting

Authors

  • Yu Sun Institute of New Concept Sensors and Molecular Materials, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710119, China
  • Huizhen Han Institute of New Concept Sensors and Molecular Materials, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710119, China
  • Yulian Zhao Institute of New Concept Sensors and Molecular Materials, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710119, China
  • Shiyi Tao Institute of New Concept Sensors and Molecular Materials, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710119, China
  • Yajie Guo School of Materials Science and Engineering, Chang’an University, Xi’an, Shaanxi 710064, China
  • Jian Ouyang Shenzhen Kohodo Hydrogen Energy Co., Ltd., Shenzhen 518109, China
  • Xin Bo Institute of New Concept Sensors and Molecular Materials, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710119, China
Article ID: 376
299 Views

DOI:

https://doi.org/10.18686/cest376

Keywords:

electrochemical analysis; electrochemical catalysis; water electrolysis; LSV; electrolyzer

Abstract

A number of catalysts have been developed for electrochemical water electrolysis in the last decades, however, the inadequate understanding and the non-standard measurements result in inaccurate activity evaluation. Especially at present, water electrolysis aims to deal with higher-current-density scenario, and the exaggeration for catalysts heavily mislead to unnecessary trial and error in the real application. The dynamic lineage sweep voltammetry, as a universal estimation method to evaluate the activity of material, is discussed, including the issues on electrochemical assessment and the possible factors to inaccuracy. Accordingly, we cast our own opinions and suggestions in practice, such as building the reasonable electrolytic cell system, including the electrode position, size, electrolyte, cell types, scan rate, stirring, selection of the counter and reference electrodes, etc. The IR compensation on resistance and conversion of specific activity are also mentioned. We suggest that the researchers should operate in a standardized manner and obtain the authentic data, without intentionally hiding the tricky experiment settings.

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Published

2025-09-02

How to Cite

Sun, Y., Han, H., Zhao, Y., Tao, S., Guo, Y., Ouyang, J., & Bo, X. (2025). Assessment issues on electrochemical catalysis for water splitting. Clean Energy Science and Technology, 3(3), 376. https://doi.org/10.18686/cest376

Issue

Vol. 3 No. 3 (2025): Recent Advances in Production, Storage, Transportation and Utilization of Hydrogen Energy

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Article

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Copyright (c) 2025 Author(s)

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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