Abstract

Ketjenblack EC-600 JD supported Ni/C electrocatalysts with a nickel content of 50 and 60 wt% were prepared by impregnation with either Ni(OAc)2 or a mixture of Ni(OAc)2 and Ni(NO3)2 precursors, followed by freeze-drying and reduction with H2. XRD, TEM and cyclic voltammetry were applied for characterizing the catalysts. The use of Ni(OAc)2 as a sacrificial agent during decomposition of Ni(NO3)2 allows one to decrease significantly the size of nickel nanoparticles (from 37 to 12 nm) at a very high metal loading. Benefiting from the high dispersion and high specific activity, 60 % Ni/Ketjenblack EC-600 JD possesses remarkable mass activity (7 A∙g−1 Ni) in the hydrogen oxidation reaction in an alkaline electrolyte.

Original languageEnglish
Article number113551
Number of pages6
JournalJournal of Electroanalytical Chemistry
Volume852
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • Alkaline solutions
  • Hydrogen oxidation reaction
  • Ketjenblack DJ-600
  • Lyophilization
  • Nickel
  • EVOLUTION
  • PARTICLES
  • ELECTRODE-REACTIONS
  • KINETICS
  • NICKEL NANOPARTICLES
  • ELECTROCATALYSTS

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