Two-Dimensional Porous Molybdenum Phosphide/Nitride Heterojunction Nanosheets for pH-Universal Hydrogen Evolution Reaction

被引：316

作者：

Gu, Ying ^{[1
]}

Wu, Aiping ^{[2
]}

Jiao, Yanqing ^{[2
]}

Zheng, Huiru ^{[2
]}

Wang, Xueqi ^{[2
]}

Xie, Ying ^{[2
]}

Wang, Lei ^{[2
]}

Tian, Chungui ^{[2
]}

Fu, Honggang ^{[1
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

[2] Heilongjiang Univ, Minist Educ Peoples Republ China, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 12期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

heterojunctions; hydrogen evolution reaction; molybdenum nitride; molybdenum phosphide; porous nanosheet; EFFICIENT; ELECTROCATALYSTS; CATALYSTS;

D O I：

10.1002/anie.202016102

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Herein, we present a new strategy for the synthesis of 2D porous MoP/Mo2N heterojunction nanosheets based on the pyrolysis of 2D [PMo12O40](3-)-melamine (PMo12-MA) nanosheet precursor from a polyethylene glycol (PEG)-mediated assembly route. The heterostructure nanosheets are ca. 20 nm thick and have plentiful pores (<5 nm). These structure features offer advantages to promote the HER activity, including the favorable water dissociation kinetics around heterojunction as confirmed by theoretical calculations, large accessible surface of 2D nanosheets, and enhanced mass-transport ability by pores. Consequently, the 2D porous MoP/Mo2N heterojunction nanosheets exhibit excellent HER activity with low overpotentials of 89, 91 and 89 mV to achieve a current density of 10 mA cm(-2) in alkaline, neutral and acidic electrolytes, respectively. The HER performance is superior to the commercial Pt/C at a current density >55 mA cm(-2) in neutral medium and >190 mA cm(-2) in alkaline medium.

引用

页码：6673 / 6681

页数：9

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