Identifying Electrocatalytic Sites of the Nanoporous Copper-Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte

被引：272

作者：

Wu, Qiuli ^{[1
]}

Luo, Min ^{[2
]}

Han, Jiuhui ^{[3
]}

Peng, Wei ^{[1
]}

Zhao, Yang ^{[1
]}

Chen, Dechao ^{[1
]}

Peng, Ming ^{[1
]}

Liu, Ji ^{[1
]}

de Groot, Frank M. F. ^{[4
]}

Tan, Yongwen ^{[1
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

[2] Shanghai Polytech Univ, Dept Phys, Shanghai 201209, Peoples R China

[3] Tohoku Univ, Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Univ Utrecht, Inorgan Chem & Catalysis, Debye Inst Nanomat Sci, Univ Weg 99, NL-3584 CG Utrecht, Netherlands

来源：

ACS ENERGY LETTERS | 2020年 / 5卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CATALYTIC-ACTIVITY; EFFICIENT; OPPORTUNITIES; PERFORMANCE; OXIDATION; METALS; CARBON; RU;

D O I：

10.1021/acsenergylett.9b02374

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：

Hydrogen production from electrochemical water splitting is a promising route to pursue clean and sustainable energy sources. Here, a three-dimensional nanoporous Cu-Ru alloy is prepared as a high-performance platinum-free catalyst for hydrogen evolution reaction (HER) by a dealloying process. Significantly, the optimized nanoporous alloy Cu53Ru47 exhibits remarkable catalytic activity for HER with nearly zero onset overpotential and ultralow Tafel slopes (similar to 30 and similar to 35 mV dec(-1)) in both alkaline and neutral electrolytes, achieving a catalytic current density of 10 mA cm(-2) at low overpotentials of similar to 15 and similar to 41 mV, respectively. Operando X-ray absorption spectroscopy experiments, in conjunction with DFT simulations, reveal that the incorporation of Ru atoms into the Cu matrix not only accelerates the reaction step rates of water adsorption and activation but also optimizes the hydrogen bonding energy on Cu and Ru active sites, improving the intrinsic activity for HER.

引用

页码：192 / 199

页数：15

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