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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chaoran Pi
  • Zhiyang Zhao
  • Xuming Zhang
  • Biao Gao
  • Yang Zheng
  • Lijun Yang
  • Kaifu Huo

Detail(s)

Original languageEnglish
Article number129130
Journal / PublicationChemical Engineering Journal
Volume416
Online published24 Feb 2021
Publication statusPublished - 15 Jul 2021

Abstract

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, three-dimensional (3D) porous heterostructured γ-MoC/VN electrocatalysts are prepared from bulk V2MoO8 by in situ carbonization and nitridation. The γ-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. Density-functional theory calculation and X-ray photoelectron spectroscopy disclose strong electron interactions and redistribution of the density of state (DOS) in the γ-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.

Research Area(s)

  • Heterostructured catalysts, Hydrogen evolution reaction, Interface Engineering, Molybdenum carbide, Vanadium nitride

Citation Format(s)

In situ construction of γ-MoC/VN heterostructured electrocatalysts with strong electron coupling for highly efficient hydrogen evolution reaction. / Pi, Chaoran; Zhao, Zhiyang; Zhang, Xuming; Gao, Biao; Zheng, Yang; Chu, Paul K.; Yang, Lijun; Huo, Kaifu.

In: Chemical Engineering Journal, Vol. 416, 129130, 15.07.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review