Channel-Rich RuCu Nanosheets for pH-Universal Overall Water Splitting Electrocatalysis

被引：404

作者：

Yao, Qing ^{[1
]}

Huang, Bolong ^{[2
]}

Zhang, Nan ^{[1
]}

Sun, Mingzi ^{[1
,2
]}

Shao, Qi ^{[1
]}

Huang, Xiaoqing ^{[1
]}

机构：

[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Renai Rd 199, Suzhou 215123, Peoples R China

[2] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hung Hom, Kowloon, Hong Kong, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 39期

基金：

中国国家自然科学基金;

关键词：

channels; electrocatalysis; nanosheets; overall water splitting; ruthenium; HYDROGEN-EVOLUTION; OXYGEN; HETEROSTRUCTURES; CATALYST; CARBON; RUO2; PD;

D O I：

10.1002/anie.201908092

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 degrees C and RuCu NSs/C-250 degrees C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm(-2) at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H2SO4 and 0.05 m H2SO4, respectively, much lower than those of commercial Ir/C parallel to Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.

引用

页码：13983 / 13988

页数：6

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