Preparation and characterization of novel Ti0.7W0.3O2-C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

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17 Citations (Scopus)

Abstract

Ti-based electroconductive mixed oxides were deposited onto activated carbon by using three different sol-gel-based multistep synthesis routes. As demonstrated by X-ray diffraction, high crystallinity of the tungsten-loaded rutile was achieved by a sequence of annealing in inert atmosphere at 750°C and a short reductive treatment at 650°C. Formation of the rutile phase on the carbon support before the high temperature treatment has been proved to be the prerequisite for complete W incorporation into the rutile lattice. The structural and compositional properties of the mixed oxides were explored by transmission electron microscopy, temperature programmed reduction and X-ray photoelectron spectroscopy. Anode electrocatalysts were formulated by loading the composite of the activated carbon and the Ti-based electroconductive mixed oxides with 40wt% Pt. Enhanced CO tolerance along with considerable stability was demonstrated for the electrocatalyst prepared using the Ti0.7W0.3O2-C composite material with high degree of W incorporation.

Original languageEnglish
Pages (from-to)455-470
Number of pages16
JournalApplied Catalysis B: Environmental
Volume174-175
DOIs
Publication statusPublished - Sep 1 2015

Keywords

  • Anode electrocatalysts
  • CO-tolerance
  • Composite materials
  • Conducting Ti-W mixed oxides
  • PEM fuel cells
  • TPR
  • XPS
  • XRD

ASJC Scopus subject areas

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

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