标题: Highly active and robust Ir-Ru electrocatalyst for alkaline HER/HOR: Combined electronic and oxophilic effect

作者: Huang, MJ (Huang, Moujie); Yang, HY (Yang, Hongyu); Xia, X (Xia, Xin); Peng, C (Peng, Chuang)

来源出版物: APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY 卷: 358 文献号: 124422 DOI: 10.1016/j.apcatb.2024.124422 Published Date: 2024 DEC 5

摘要: Developing efficient and robust electrocatalysts for alkaline hydrogen oxidation/evolution reaction (HOR/HER) is crucial to alkaline fuel cells and water electrolysis. Herein, we report iridium-ruthenium nanoclusters on carbon support (Ir-Ru@C) electrocatalyst with ultra-high alkaline HOR/HER catalytic activity and anti-CO poisoning capability. The HOR mass activity and specific activity of Ir-Ru@C electrocatalyst are 2.3 and 5.7 times that of commercial Pt@C. For alkaline HER, Ir-Ru@C shows an ultra-low overpotential of 13 mV at 10 mA cm(-2) and high mass activity of 4.0 A mg((Ir+Ru))(-1) at 60 mV (vs. RHE), superior to commercial Pt@C and most of the advanced electrocatalysts reported in literature. Mechanism studies based on spectroscopic, electrochemical and DFT results reveal that the combined electronic and oxophilic regulation of Ir-Ru bimetallic nanoclusters simultaneously optimizes H-ad and OHad adsorption, leading to its high activity and anti-CO poisoning capabilities.

作者关键词: Hydrogen oxidation reaction; Hydrogen evolution reaction; Ir-Ru bimetallic catalysts; Electronic effects; Oxophilicity

KeyWords Plus: HYDROGEN OXIDATION REACTION; NANOPARTICLES

地址: [Huang, Moujie; Peng, Chuang] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Yang, Hongyu; Xia, Xin] North China Elect Power Univ, Coll New Energy, Beijing 102206, Peoples R China.

通讯作者地址: Peng, C (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Xia, X (通讯作者)，North China Elect Power Univ, Coll New Energy, Beijing 102206, Peoples R China.

电子邮件地址: xxia@ncepu.edu.cn; chuang.peng@whu.edu.cn

影响因子：20.3