Hydrogen spillover effect tuning the rate-determining step of hydrogen evolution over Pd/Ir hetero-metallene for industry-level current density

被引：11

作者：

Deng, Kai ^{[1
]}

Lian, Zilong ^{[1
]}

Wang, Wenxin ^{[1
]}

Yu, Jiabao ^{[1
]}

Mao, Qiqi ^{[1
]}

Yu, Hongjie ^{[1
]}

Wang, Ziqiang ^{[1
]}

Wang, Liang ^{[1
]}

Wang, Hongjing ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Chem Engn, State Key Lab Breeding Base Green Chem Synth Tech, Hangzhou 310014, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 352卷

基金：

中国国家自然科学基金;

关键词：

Metallene; Pt-group metals; Hydrogen evolution reaction; Hydrogen spillover; Industry-level current density; ELECTROCATALYSTS; OXIDATION;

D O I：

10.1016/j.apcatb.2024.124047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Despite the fruitful achievements in the development of high-performance catalysts, most of materials still suffer limited HER kinetics and poor durability in harsh acidic media, especially at high current densities. In this work, a Pd nanoparticles/Ir metallene heterojunction structure (Pd/Ir hetero-metallene) were successfully prepared by a facile co-reduction method. The hydrogen spillover bridging H+ adsorption/H-2 desorption process occurring at the Pd/Ir interface results in the rate-determining step change to a Tafel step, which accelerates the HER kinetics. The Pd/Ir hetero-metallene has a relatively low Delta G(Hads) (-0.19 eV), which allows for rapid adsorption of H+ and release of H-2, thus greatly improving the performance of HER. As a result, the Pd/Ir hetero-metallene exhibits remarkable HER performance with ultra-low overpotentials of only 69 and 133 mV to reach 500 and 1000 mA cm(-2), a small Tafel slope of 21 mV dec(-1), and superb stability.

引用

页数：8