Nitrogen-Doped CoP Electrocatalysts for Coupled Hydrogen Evolution and Sulfur Generation with Low Energy Consumption

被引：407

作者：

Zhou, Qingwen ^{[1
,2
]}

Shen, Zihan ^{[1
,2
]}

Zhu, Chao ^{[1
,2
]}

Li, Jiachen ^{[3
]}

Ding, Zhiyuan ^{[1
,2
]}

Wang, Peng ^{[1
,2
]}

Pan, Feng ^{[4
]}

Zhang, Zhiyong ^{[5
]}

Ma, Haixia ^{[3
]}

Wang, Shuangyin ^{[6
]}

Zhang, Huigang ^{[1
,2
]}

机构：

[1] Nanjing Univ, Inst Mat Engn, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Northwest Univ, Dept Chem Engn, Xian 710069, Shaanxi, Peoples R China

[4] Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Guangdong, Peoples R China

[5] Northwest Univ, Sch Informat Sci & Technol, Xian 710127, Shaanxi, Peoples R China

[6] Hunan Univ, Coll Chem & Chem Engn, Changsha 410012, Hunan, Peoples R China

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 27期

基金：

美国国家科学基金会;

关键词：

cobalt phosphide; electrocatalyst; hydrogen evolution reaction; nitrogen doping; sulfur recovery; EFFICIENT ELECTROCATALYST; CATALYTIC-ACTIVITY; NANOWIRE ARRAYS; GAS-FIELD; WATER; OXYGEN; CARBON; ROBUST; NANOPARTICLES; NANOCRYSTALS;

D O I：

10.1002/adma.201800140

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hydrogen production is the key step for the future hydrogen economy. As a promising H-2 production route, electrolysis of water suffers from high overpotentials and high energy consumption. This study proposes an N-doped CoP as the novel and effective electrocatalyst for hydrogen evolution reaction (HER) and constructs a coupled system for simultaneous hydrogen and sulfur production. Nitrogen doping lowers the d-band of CoP and weakens the H adsorption on the surface of CoP because of the strong electronegativity of nitrogen as compared to phosphorus. The H adsorption that is close to thermos-neutral states enables the effective electrolysis of the HER. Only -42 mV is required to drive a current density of -10 mA cm(-2) for the HER. The oxygen evolution reaction in the anode is replaced by the oxidation reaction of Fe2+, which is regenerated by a coupled H2S absorption reaction. The coupled system can significantly reduce the energy consumption of the HER and recover useful sulfur sources.

引用

页数：8

共 70 条

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