A rhodium/silicon co-electrocatalyst design concept to surpass platinum hydrogen evolution activity at high overpotentials

被引：327

作者：

Zhu, Lili ^{[1
]}

Lin, Haiping ^{[1
]}

Li, Youyong ^{[1
]}

Liao, Fan ^{[1
]}

Lifshitz, Yeshayahu ^{[1
,2
]}

Sheng, Minqi ^{[1
]}

Lee, Shuit-Tong ^{[1
]}

Shao, Mingwang ^{[1
]}

机构：

[1] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China

[2] Technion Israel Inst Technol, Mat Sci & Engn Dept, IL-3200003 Haifa, Israel

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

中国国家自然科学基金;

关键词：

TOTAL-ENERGY CALCULATIONS; EDGE SITES; GROWTH; METALS; MOS2;

D O I：

10.1038/ncomms12272

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Currently, platinum-based electrocatalysts show the best performance for hydrogen evolution. All hydrogen evolution reaction catalysts should however obey Sabatier's principle, that is, the adsorption energy of hydrogen to the catalyst surface should be neither too high nor too low to balance between hydrogen adsorption and desorption. To overcome the limitation of this principle, here we choose a composite (rhodium/silicon nanowire) catalyst, in which hydrogen adsorption occurs on rhodium with a large adsorption energy while hydrogen evolution occurs on silicon with a small adsorption energy. We show that the composite is stable with better hydrogen evolution activity than rhodium nanoparticles and even exceeding those of commercial platinum/carbon at high overpotentials. The results reveal that silicon plays a key role in the electrocatalysis. This work may thus open the door for the design and fabrication of electrocatalysts for high-efficiency electric energy to hydrogen energy conversion.

引用

页数：7

共 22 条

[1] Atomic cobalt on nitrogen-doped graphene for hydrogen generation [J].