Effect of atomic-layer-deposited TiO2 on carbon-supported Ni catalysts for electrocatalytic glycerol oxidation in alkaline media

Jisu Han, Youngmin Kim, Hyun Woo Kim, David H.K. Jackson, Daewon Lee, Hyunju Chang, Ho Jeong Chae, Kwan Young Lee, Hyung Ju Kim

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11 Citations (Scopus)

Abstract

Thin TiO2 layers were deposited onto a carbon-supported Ni catalyst (Ni/C) through atomic layer deposition (ALD) and the resulting TiO2-coated Ni/C (ALD(TiO2)-Ni/C) was utilized for electrochemical glycerol oxidation in alkaline media. X-ray photoelectron spectroscopy analysis demonstrated that the Ni surface phase of ALD(TiO2)-Ni/C mainly consisted of Ni(OH)2 while that of uncoated Ni/C was a mixed phase of NiO and Ni(OH)2. The ALD(TiO2)-Ni/C exhibited electrocatalytic activity at least 2.4 times higher than that of Ni/C. Density functional theory calculations were used to investigate how the modified Ni surface with the TiO2 coating affects the adsorption/desorption of glycerol.

Original languageEnglish
Pages (from-to)46-50
Number of pages5
JournalElectrochemistry Communications
Volume83
DOIs
Publication statusPublished - 2017 Oct 1

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Keywords

  • Alkaline electrolyte
  • Atomic layer deposition
  • Electrocatalytic oxidation
  • Glycerol
  • Nickel
  • Titanium dioxide

ASJC Scopus subject areas

  • Electrochemistry

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