Boosting Electrocatalytic Hydrogen Evolution of Nickel foam Supported Nickel Hydroxide by Ruthenium Doping

Hari Krishna Sadhanala, Ilana Perelshtein, Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Hydrogen evolution reaction (HER) in acid electrolytes has advantages for electrolysis of water due to large supply of hydrogen ions. Herein, we report the synthesis of ruthenium doped nickel hydroxide on commercial nickel foam (Ru−Ni(OH)2/NF) by using simple hydrothermal method. Due to integrated assembly and porous structure, as prepared Ru−Ni(OH)2/NF is explored as an electrocatalyst for HER in 0.5 M H2SO4 solution at room temperature. The Ru−Ni(OH)2/NF showed excellent electrocatalytic HER activity with Tafel slope of 94 mV/dec. The overpotential of Ru−Ni(OH)2/NF required to deliver 10 mAcm−2 current density was calculated to be 27 mV, which is smaller than that of commercial Pt/C/NF catalyst (33 mV). Furthermore, the Ru−Ni(OH)2/NF has shown decent stability and notable durability. The enhanced HER activity of Ru−Ni(OH)2/NF is attributed to Ru doping Ni(OH)2/NF and effective contacts between the Ru−Ni(OH)2 and NF substrate. Finally, these results may provide guidance to the design of Pt-free catalysts for effective energy related electrocatalytic applications.

Original languageEnglish
Pages (from-to)9626-9634
Number of pages9
JournalChemistrySelect
Volume5
Issue number31
DOIs
StatePublished - 21 Aug 2020

Bibliographical note

Publisher Copyright:
© 2020 Wiley-VCH GmbH

Keywords

  • hydrogen evolution reaction
  • hydrothermal method
  • nickel foam
  • nickel hydroxide
  • ruthenium

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