Vanadium-doped MoSe2 Nanosheets: Induced lattice contraction and enhanced conductivity for superior hydrogen evolution reaction

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications Pub Date : 2025-03-22 DOI:10.1016/j.elecom.2025.107916

Ramaraj Sukanya , Raj Karthik , Abdullah Al Mahmud , Deivasigamani Ranjith Kumar , Eswaran Kamaraj , Carmel B. Breslin , Jae-Jin Shim

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Abstract

In the modern world with a growing global energy demand, renewable hydrogen has emerged as a viable and attractive option. Herein, a highly efficient electrocatalyst for the hydrogen evolution reaction (HER) in an acidic medium was designed by doping MoSe₂ with vanadium (V-MoSe₂). The V-doped MoSe₂ was formed using a simple hydrothermal reaction and characterised using FE-SEM, FE-TEM, XRD and XPS. The V-MoSe₂ was superior to MoSe₂ and comparable to Pt/C in the HER. An overpotential of 217 mV for Pt/C and 353 mV for V-MoSe₂ was required to deliver a current density of 10 mA/cm². This enhanced HER activity seen with V-MoSe₂ was attributed to a lattice contraction, a more metallic-like phase with enhanced electrical conductivity, and an increase in the density of catalytically active sites that promote the HER.

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钒掺杂MoSe2纳米片：诱导晶格收缩和增强电导率以促进优异的析氢反应

在全球能源需求不断增长的现代世界，可再生氢已成为一种可行且有吸引力的选择。本文通过在酸性介质中掺杂钒（V-MoSe2），设计了一种高效的析氢反应（HER）电催化剂。采用简单水热反应制备了v掺杂MoSe2，并利用FE-SEM、FE-TEM、XRD和XPS对其进行了表征。在HER中，V-MoSe2优于MoSe2，与Pt/C相当。Pt/C的过电位为217 mV， V-MoSe2的过电位为353 mV，以提供10 mA/cm2的电流密度。在V-MoSe2中观察到的这种增强的HER活性归因于晶格收缩，更像金属的相具有增强的导电性，以及促进HER的催化活性位点密度的增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochemistry Communications 工程技术-电化学

CiteScore

8.50

自引率

3.70%

发文量

160

审稿时长

1.2 months

期刊介绍： Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.