High electrocatalytic hydrogen evolution activity on a coupled Ru and CoO hybrid electrocatalyst

被引：42

作者：

Guo, Jia-Xin ^{[1
]}

Yan, Dong-Yang ^{[1
]}

Qiu, Kang-Wen ^{[1
]}

Mu, Chuan ^{[1
]}

Jiao, Dian ^{[1
]}

Mao, Jing ^{[1
]}

Wang, Hui ^{[2
]}

Ling, Tao ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Key Lab Adv Ceram & Machining Technol,Minist Educ, Tianjin 300072, Peoples R China

[2] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2019年 / 37卷

关键词：

Ruthenium; Oxides; Hybrid electrocatalyst; Hydrogen evolution reaction; CORE/SHELL NANOSHEETS; WATER; SUPPORT; NANOPARTICLES; EFFICIENT; CATALYST; NANOSTRUCTURE; DISSOCIATION;

D O I：

10.1016/j.jechem.2018.12.011

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Hydrogen evolution reaction (HER) is an essential step in converting renewable energy to clean hydrogen fuel. Exploring highly efficient, stable and cost-effective electrocatalysts is of crucial significance for sustainable HER. Here, we report the design of a coupled ruthenium/cobalt oxide (Ru/CoO) hybrid electrocatalyst for alkaline HER. In this hybrid metal/oxide system, the complicated alkaline HER pathways are overall facilitated; oxygen (O)-vacancy-abundant oxide enhances water splitting and Ru promotes successive hydrogen intermediates to generate hydrogen. The resulting Ru/CoO hybrid electrocatalyst exhibits significantly promoted catalytic activity compared with benchmark Ru catalyst, displaying an overpotential of 55 mV to generate a HER current density of 10 mA cm(-2), comparable with the state-of-the-art Pt/C catalyst and the most efficient alkaline HER electrocatalysts. Furthermore, the strong interaction of Ru nanoparticles with oxide support and the in-situ growth of oxide support on conductive substrate guarantee the long-term stability of as-fabricated Ru/CoO hybrid electrocatalyst. This newly designed hybrid catalyst with abundant metal/oxide interfaces may pave a new pathway for exploring efficient and stable HER electrocatalysts. (C) 2018 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

引用

页码：143 / 147

页数：5

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