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Developing high-efficiency and low-cost oxygen evolution reaction (OER) catalysts is crucial to advance the water splitting technology for sustainable hydrogen production. Here, a FeCoNi coordinated benzene-1,3,5-tricarboxylic acid (FeCoNiBTC) metal-organic framework (MOF) was synthesized by one-step solvothermal method for OER. A rapid in-situ chemical and electrochemical transformation was observed on the surface of the FeCoNiBTC MOF during OER process. The formed catalytic active FeCoNiOx(OH)y species retained the unique structure feature of initial FeCoNiBTC, moreover, it possessed multiple transition metal active nodes that cooperate with each other to adjust the electronic structure. Owing to the above structure advantages, the in-situ transformed FeCoNiOx(OH)y showed excellent OER catalytic activity with a small overpotential of 230 mV to achieve the 100 mA·cm−2, a low Tafel slope of 50.2 mV·dec−1, and superior stability of almost 80 h in alkaline aqueous solution. This work systematically studies the structure–performance relations of the multi-metal MOF-based materials in OER process, and it would enrich the exploration of highly efficient OER electrocatalysts.

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Publication history
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Acknowledgements

Publication history

Received: 14 April 2022
Revised: 22 June 2022
Accepted: 25 June 2022
Published: 15 July 2022
Issue date: March 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This project was funded by the financial support from the Start-up Foundation of Shanghai Institute of Ceramics, Chinese Academy of Sciences (Nos. E03ZZ51501 and E11YB5150G). We also acknowledge the financial support by the Natural Science Foundation of Shanghai (No. 22ZR1471900), Shanghai Qimingxing Project (No. 22QA1410300),Shanghai Municipal Science and Technology Commission of Carbon Peak&Carbon Neutrality Project (No. 21DZ1207900), and the Hundred Talents Program of the Chinese Academy of Sciences (Nos. E13ZB313 and E11YB515).

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