Facile synthesis of CoX (X = S, P) as an efficient electrocatalyst for hydrogen evolution reaction

被引：68

作者：

Li, Jiayuan ^{[1
]}

Zhou, Xuemei ^{[1
]}

Xia, Zhaoming ^{[1
]}

Zhang, Zhiyun ^{[1
]}

Li, Jing ^{[1
]}

Ma, Yuanyuan ^{[1
,2
]}

Qu, Yongquan ^{[1
,2
,3
]}

机构：

[1] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Ctr Appl Chem Res, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[3] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 24期

关键词：

ACTIVE EDGE SITES; NICKEL PHOSPHIDE; H-2; PRODUCTION; MOS2; MOLYBDENUM; CATALYST; NANOPARTICLES; SURFACE; WATER; GENERATION;

D O I：

10.1039/c5ta03153b

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 environmentally-friendly and earth-abundant electrocatalysts is desirable for an efficient hydrogen evolution reaction (HER). Herein, we report a facile and controllable synthesis of CoX (X = S, P) nanocatalysts by the chemical conversion of thin Co(OH)(2) nanoplates under mild conditions. Both catalysts delivered high catalytic activity for HER. Small onset potentials of 59 and 32 mV, along with low Tafel slopes of 56.2 and 54.8 mV dec(-1), were observed for CoS and CoP, respectively. Analyses suggest that the better HER performance of CoP nanocatalysts could be attributed to the intrinsically more positively charged nature of the Co metal center, the longer Co-P bond length, and more catalytic active sites due to the smaller size of the CoP nanocatalysts. High catalytic stability in acidic media was also observed for both CoS and CoP catalysts for a duration of 18 hours.

引用

页码：13066 / 13071

页数：6

共 53 条

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