Ultradispersed IrxNi clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes

Xiaojie Zhao; Ying Chang; Jiang Ji; Jingchun Jia; Meilin Jia

doi:10.1039/D1RA06136D

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Ultradispersed Ir_xNi clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes†

Xiaojie Zhao,^a Ying Chang,*^a Jiang Ji,^a Jingchun Jia

*^a and Meilin Jia^a

Author affiliations

* Corresponding authors

^a College of Chemistry and Environmental Science, Inner Mongolia Key Laboratory of Green Catalysis and Inner Mongolia Collaborative Innovation Center for Water Environment Safety, Inner Mongolia Normal University, Hohhot, China
E-mail: changying@imnu.edu.cn, jjc1983@126.com

Abstract

Design and synthesis of electrocatalysts with high activity and low cost is an important challenge for water splitting. We report a rapid and facile synthetic route to obtain Ir_xNi clusters via polyol reduction. The Ir_xNi clusters show excellent activity for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in acidic electrolytes. The optimized Ir₂Ni/C clusters exhibit an electrochemical active area of 18.27 mF cm⁻², with the overpotential of OER being 292 mV and HER being 30 mV at 10 mA cm⁻², respectively. In addition, the Ir₂Ni/C used as the cathode and anode for the H-type hydrolysis tank only needs 1.597 V cell voltages. The excellent electrocatalytic performance is mainly attributed to the synergistic effect between the metals and the ultra-fine particle size. This study provides a novel strategy that has a broad application for water splitting.

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Article information

DOI: https://doi.org/10.1039/D1RA06136D
Article type: Paper
Submitted: 13 Aug 2021
Accepted: 28 Sep 2021
First published: 08 Oct 2021
This article is Open Access

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RSC Adv., 2021,11, 33179-33185

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Ultradispersed Ir_xNi clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes

X. Zhao, Y. Chang, J. Ji, J. Jia and M. Jia, RSC Adv., 2021, 11, 33179 DOI: 10.1039/D1RA06136D

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