• 文献标题:   Synthesis and characterization of transition metal mixed oxide doped graphene embedded durable electrocatalyst for hydrogen evolution reaction
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   SARIKA S, ABHILASH S, SUMI VS, RIJITH S
  • 作者关键词:   graphene oxide, mixed oxide electrocatalyst, nicop, titanium dioxide, hydrogen evolution reaction
  • 出版物名称:   INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • ISSN:   0360-3199 EI 1879-3487
  • 通讯作者地址:  
  • 被引频次:   10
  • DOI:   10.1016/j.ijhydene.2021.01.137 EA APR 2021
  • 出版年:   2021

▎ 摘  要

A promising electrocatalyst containing variable percentage of V2O5-TiO2 mixed oxide in graphene oxide support was prepared by embedding the catalyst on Cu substrate through facile electroless Ni-Co-P plating for hydrogen evolution reaction. The solvothermal decomposition method was opted for tuning the crystalline characteristics of prepared material. The optimized mixed oxide was well characterized, active sites centres were identified and explained by X-ray diffraction, high resolution tunnelling electron micro-scopy, scanning electron microscopy coupled with energy dispersive X-ray and X-ray photon spectroscopy analysis. The structural and electronic characteristics of material was done by fourier transform infrared spectroscopy and the electrochemical behaviour of the prepared material was evaluated by using Tafel plot, electrochemical impedance analysis, linear sweep voltammetry, open circuit analysis and chronoamperometry measurements. The results show the enhanced catalytic activity of Ni-Co-P than pure Ni-P plate, due to synergic effect. Moreover, the prepared mixed oxide incorporated Ni-Co-P plate has a high activity towards HER with low over potential of 101 mV, low Tafel slope of 36 mVdec(-1), high exchange current density of 9.90 x 10(-2) Acm(-2). (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.