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Oxygen evolution catalytic behaviour of Ni doped Mn3O4 in alkaline medium

机译:Ni掺杂Mn3O4在碱性培养基中的氧气演化催化行为

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摘要

Electrocatalytic water splitting/electrolysis are accomplished by employing a precious noble metal and metal oxide catalyst. Due to their limited availability and high cost, recent research has focused on the development of earth abundant, low cost, eco-friendly and non-precious catalysts. Towards this goal, this work aims to the study the effect of Ni doping in Mn3O4 for OER in alkaline medium. Mn3O4 and Ni doped Mn3O4 were synthesized through a simple CTAB assisted co-precipitation reaction followed by calcination. The physical and chemical properties associated with the catalytic activity of the samples were investigated. The results suggest that an optimum of 10 wt% Ni doped Mn3O4 exhibits better catalytic activity compared to pure Mn3O4. It shows a lower overpotential of eta = 283 mV vs. RHE at 10 mA cm(-2), eta = 235 mV vs. RHE at 5 mA cm(-2) and Tafel slope of 165 mV dec(-1) compared to pure Mn3O4 and 1 and 5 wt% Ni doped Mn3O4. The overpotential obtained in the present study is lower than that of the recent studies on Mn3O4, graphene-Mn3O4, Pt-Mn3O4 and Pd-Mn3O4.
机译:通过采用贵贵金属和金属氧化物催化剂来实现电催化水分解/电解。由于它们有限的可用性和高成本,最近的研究专注于地球丰富,成本低,环保和非珍贵催化剂的发展。为了实现这一目标,这项工作旨在研究Ni掺杂在碱性培养基中的MN3O4中Ni掺杂的影响。通过简单的CTAB辅助共沉淀反应,合成Mn3O4和Ni掺杂Mn3O4,然后进行煅烧。研究了与样品的催化活性相关的物理和化学性质。结果表明,与纯MN3O4相比,10wt%Ni掺杂Mn3O4的最佳催化活性表现出更好的催化活性。它显示了10 mA cm(-2),ETa = 235mV与rhe在5 mA cm(-2)和165mV(-1)的Tafel斜率(-1)的β= 283mV与rhe的较低过电位。纯Mn3O4和1和5wt%Ni掺杂Mn3O4。本研究中获得的过电位低于最近Mn3O4,Graphene-Mn3O4,Pt-Mn3O4和Pd-Mn3O4的最近研究。

著录项

  • 来源
    《RSC Advances》 |2016年第54期|共8页
  • 作者单位

    Cent Electrochem Res Inst CSIR Karaikkudi 630003 Tamil Nadu India;

    Cent Electrochem Res Inst CSIR Karaikkudi 630003 Tamil Nadu India;

    Cent Electrochem Res Inst CSIR Karaikkudi 630003 Tamil Nadu India;

    Cent Electrochem Res Inst CSIR Karaikkudi 630003 Tamil Nadu India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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