Enhanced catalytic performance and changed reaction chemistry for electrochemical glycerol oxidation by atomic-layer-deposited Pt-nanoparticle catalysts

Jisu Han, Youngmin Kim, David H.K. Jackson, Hyunju Chang, Hyun Woo Kim, Jechan Lee, Jeong Rang Kim, Yuseong Noh, Won Bae Kim, Kwan Young Lee, Hyung Ju Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Atomically controlled thin TiO2 layers were coated onto a carbon-supported Pt nanoparticle (Pt/C) surface using an atomic layer deposition (ALD) technique. Then, the resulting TiO2 coated Pt/C (ALD(TiO2)-Pt/C) was heat-treated at 150 °C under N2 atmosphere. The heat-treated ALD(TiO2)-Pt/C (ALD(TiO2)-Pt/C(150 H T)) catalyst demonstrated improved electrocatalytic glycerol oxidation reaction (GOR) activity with a turnover frequency (TOF) 3-times higher than for uncoated Pt/C catalyst. Interestingly, the ALD(TiO2)-Pt/C(150 H T) catalyst maintained its catalytic GOR performance after a cyclic voltammetry (CV) stability test of 1200 cycles, preventing Pt sintering due to strong Pt-TiO2 interaction. The reaction chemistry for GOR on the ALD(TiO2)-Pt/C(150 H T) catalyst also changed due to the newly created Pt-TiO2 interfaces, producing more oxidized chemicals such as glyceric acid and glycolic acid. The enhanced GOR performance is related to the formation of new Pt-O-Ti bonds and to change in the physicochemical properties of the Pt by interaction between the Pt nanoparticles and ALD-coated TiO2.

Original languageEnglish
Article number119037
JournalApplied Catalysis B: Environmental
Volume273
DOIs
Publication statusPublished - 2020 Sep 15

Keywords

  • Atomic layer deposition
  • Electrocatalytic oxidations
  • Glycerol
  • Platinum nanoparticle
  • Titanium dioxide

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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