In situ construction of ?-MoC/VN heterostructured electrocatalysts with strong electron coupling for highly efficient hydrogen evolution reaction

被引：40
|
作者：
Pi, Chaoran [1 ]
Zhao, Zhiyang [3 ,4 ]
Zhang, Xuming [1 ]
Gao, Biao [1 ,5 ,6 ]
Zheng, Yang [1 ]
Chu, Paul K. [5 ,6 ]
Yang, Lijun [3 ,4 ]
Huo, Kaifu [2 ]
机构：
[1] Wuhan Univ Sci & Technol, Inst Adv Mat & Nanotechnol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Peoples R China
[3] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem MOE, Nanjing 210023, Peoples R China
[4] Nanjing Univ, Sch Chem & Chem Engn, Jiangsu Prov Lab Nanotechnol, Nanjing 210023, Peoples R China
[5] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
[6] City Univ Hong Kong, Dept Biomed Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2021年 / 416卷
基金：
中国国家自然科学基金;
关键词：
Heterostructured catalysts; Molybdenum carbide; Vanadium nitride; Hydrogen evolution reaction; Interface Engineering; MOLYBDENUM CARBIDE; INTERFACES; NANOSHEETS; MO2C;
D O I：
10.1016/j.cej.2021.129130
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Rational design of high-efficiency, low-cost, and durable electrocatalysts for the hydrogen evolution reaction (HER) is imperative to clean hydrogen energy production by electrochemical water splitting. Herein, threedimensional (3D) porous heterostructured ?-MoC/VN electrocatalysts are prepared from bulk V2MoO8 by in situ carbonization and nitridation. The ?-MoC/VN heterostructured catalyst has a large surface area, porous structure, enriched active sites consequently producing efficient and stable HER electrocatalytic properties as exemplified by a low overpotential of 86.6 mV at 10 mA cm-2 and Tafel slope of 47.6 mV dec-1. Densityfunctional theory calculation and X-ray photoelectron spectroscopy disclose strong electron interactions and redistribution of the density of state (DOS) in the ?-MoC/VN enabled by VN electron donation resulting in optimized H adsorption/desorption and enhanced HER catalytic activity. This work reveals a novel strategy to design porous heterostructured electrocatalysts with strong electron modulation for electrocatalytic water splitting and electrochemical energy conversion.
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页数：7
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