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Ultradispersed Ir _x Ni clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes.

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 _x Ni clusters via polyol reduction. The Ir _x Ni 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.

SUBMITTER: Zhao X

PROVIDER: S-EPMC9042089 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Ultradispersed Ir x Ni clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes.

Zhao Xiaojie X Chang Ying Y Ji Jiang J Jia Jingchun J Jia Meilin M

RSC advances 20211008 53

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 x Ni clusters via polyol reduction. The Ir x Ni 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< ...[more]

PMID: 35497523

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