Double-catalytic-site engineering of nickel-based electrocatalysts by group VB metals doping coupling with in-situ cathodic activation for hydrogen evolution

被引：39

作者：

Shang, Xiao ^{[1
]}

Zhang, Xin-Yu ^{[1
]}

Xie, Jing-Yi ^{[1
,2
]}

Dong, Bin ^{[1
,2
]}

Chi, Jing-Qi ^{[1
]}

Guo, Bao-Yu ^{[1
,2
]}

Yang, Min ^{[1
]}

Chai, Yong-Ming ^{[1
]}

Liu, Chen-Guang ^{[1
]}

机构：

[1] China Univ Petr East China, Inst New Energy, State Key Lab Heavy Oil Proc, Qingdao 266580, Shandong, Peoples R China

[2] China Univ Petr East China, Coll Sci, Qingdao 266580, Shandong, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 258卷

基金：

中国国家自然科学基金;

关键词：

Double-site catalysis; Group VB transition metal; In-situ cathodic activation; Coupling strategy; Alkaline hydrogen evolution; ELECTROCHEMICAL PRODUCTION; DOUBLE HYDROXIDE; EFFICIENT; GENERATION; NANOSHEETS; SULFIDE; FILMS; NANOPARTICLES; PHOSPHORUS; OXIDATION;

D O I：

10.1016/j.apcatb.2019.117984

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：

The hydrogen evolution reaction (HER) in alkaline media is limited by poor-proton environment with the water dissociation step. Herein, we report a double-catalytic-site construction strategy for nickel-based materials (e.g., sulfides, selenides, phosphides and oxides) for HER, utilizing group VB metals (V, Nb or Ta) doping coupled with the subsequent in-situ cathodic activation (ICA). For V-doped nickel sulfide, ICA creates Ni-V oxides species as new active sites for water dissociation. Moreover, V dopants enhance the intrinsic activity of nickel sulfide by the electronic interaction between Ni and V during the ICA process. As a result, the double-catalytic-site system composed of Ni V sulfides-oxides hybrid achieves 4-fold higher intrinsic activity and 15-fold larger current density at the overpotential of 300 mV than those of pristine nickel sulfide. Our work may open up a new avenue for designing multi-site systems, which may be promisingly applied for other transition metal materials in the electrolysis field.

引用

页数：8