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

Dorottya Gubán, I. Borbáth, Z. Pászti, I. Sajó, Eszter Drotár, M. Hegedűs, A. Tompos

Research output: Contribution to journalArticle

15 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

Fingerprint

Electrocatalysts
Carbon Monoxide
rutile
Oxides
Anodes
tolerance
oxide
Activated carbon
activated carbon
Composite materials
Tungsten
tungsten
annealing
crystallinity
X-ray spectroscopy
Sol-gels
transmission electron microscopy
Carbon
X ray photoelectron spectroscopy
gel

Keywords

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

ASJC Scopus subject areas

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

Cite this

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title = "Preparation and characterization of novel Ti0.7W0.3O2-C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance",
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.",
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author = "Dorottya Gub{\'a}n and I. Borb{\'a}th and Z. P{\'a}szti and I. Saj{\'o} and Eszter Drot{\'a}r and M. Hegedűs and A. Tompos",
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T1 - Preparation and characterization of novel Ti0.7W0.3O2-C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

AU - Gubán, Dorottya

AU - Borbáth, I.

AU - Pászti, Z.

AU - Sajó, I.

AU - Drotár, Eszter

AU - Hegedűs, M.

AU - Tompos, A.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - 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.

AB - 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.

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