Amine-Modulated/Engineered Interfaces of NiMo Electrocatalysts for Improved Hydrogen Evolution Reaction in Alkaline Solutions

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

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Author(s)

  • Wangyan Gou
  • Xuemei Zhou
  • Yuanyuan Ma
  • Yongquan Qu

Detail(s)

Original languageEnglish
Pages (from-to)1728-1733
Journal / PublicationACS Applied Materials and Interfaces
Volume10
Issue number2
Publication statusPublished - 17 Jan 2018

Abstract

The interface between electrolytes and electrocatalysts would largely determine their corresponding activity and stability. Herein, modulating the surface characteristics of NiMo nanoparticles by various adsorbed amines gives the tunability on their interfacial properties and subsequently improves their catalytic performance for hydrogen evolution reaction (HER) in alkaline solutions. Diamines can significantly improve their HER activity by decreasing the charge-transfer resistance and modulating the electronic structures of interfacial active sites. Importantly, among various amines, ethylenediamine facilitates the HER activity of NiMo with a remarkable decrease of 268 mV in the overpotential to reach 10 mA cm-2 as compared with that of the unmodified NiMo in 1.0 M KOH. This method provides a novel strategy of regulating the interfacial properties to strengthen the catalytic performance of electrocatalysts.

Research Area(s)

  • electrocatalysis, hydrogen evolution, interface engineering, NiMo, surface modulation

Citation Format(s)