IrMo Nanocatalysts for Efficient Alkaline Hydrogen Electrocatalysis

被引：122

作者：

Fu, Luhong ^{[1
]}

Li, Yunbo ^{[1
]}

Yao, Na ^{[1
]}

Yang, Fulin ^{[1
]}

Cheng, Gongzhen ^{[1
]}

Luo, Wei ^{[1
,2
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Suzhou Inst, Suzhou 215123, Peoples R China

来源：

ACS CATALYSIS | 2020年 / 10卷 / 13期

基金：

中国国家自然科学基金;

关键词：

hydrogen oxidation reaction; hydrogen evolution reaction; IrMo; bifunctional mechanism; DFT; OXIDATION REACTION; EVOLUTION REACTION; DURABILITY; CATALYSTS; HYDROXIDE; MECHANISM; KINETICS; INSIGHTS; DESIGN; TRENDS;

D O I：

10.1021/acscatal.0c02254

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：

Developing highly efficient electrocatalysts and fundamentally understanding the mechanisms for alkaline hydrogen electrode reactions, including the hydrogen oxidation reaction (HOR) and the hydrogen evolution reaction (HER), are highly desirable. Here we report the synthesis of the IrMo alloy nanocatalyst and its outstanding HOR/HER performances under alkaline media. Specifically, the IrMo0.59 exhibits the highest catalytic activities, which are 5 times higher than that of Ir and commercial Pt/C toward HOR and even a 10-fold enhancement toward HER. Density functional theory (DFT) calculations reveal that H2O-occupied Mo sites on the surface of IrMo could effectively optimize the free energies of *H2O and *OH, thereby enable IrMo following the so-called bifunctional mechanism both in alkaline HER/HOR electrolysis.

引用

页码：7322 / 7327

页数：6

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