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Experimental and Theoretical Insights of MoS 2 /Mo 3 N 2 Nanoribbon‐Electrocatalysts for Efficient Hydrogen Evolution Reaction
Author(s) -
Tan Junbin,
Mei Yahui,
Shen Hangjia,
Liu Honghong,
Azhagan Tamil,
Song Weiyu,
Thomas Tiju,
Liu Jian,
Yang Minghui,
Gao Manglai
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901874
Subject(s) - overpotential , electrocatalyst , sulfidation , hydrogen , conductivity , materials science , metal , inorganic chemistry , chemistry , chemical engineering , catalysis , nanotechnology , electrochemistry , electrode , metallurgy , organic chemistry , engineering
MoS 2 is a promising material for electrocatalysis and opens up avenues for the development of non‐precious metal electrocatalysts for hydrogen evolution reaction in acidic media. However, the activity of MoS 2 has been severely impeded because of its inferior conductivity. Herein, a nanoribbon‐like MoS 2 /Mo 3 N 2 hybrid is successfully fabricated via partial sulfidation of Mo 3 N 2 in H 2 S atmosphere. The synergistic effect between the high intrinsic activity of MoS 2 and the desirable conductivity of Mo 3 N 2 contributes to the overpotential at the current density of 10 mA cm −2 (η 10 ) of 196 mV towards hydrogen evolution, distinctively lower than Mo 3 N 2 (467 mV) and MoS 2 (293 mV). The theoretical simulation discloses that the Gibbs free‐energy for the adsorption of atomic hydrogen (|ΔG H* |) for MoS 2 /Mo 3 N 2 is less than that of others, and thus facilitating the hydrogen evolution.