Jump to main content
Jump to site search

Issue 47, 2015
Previous Article Next Article

Highly cost-effective and sulfur/coking resistant VOx-grafted TiO2 nanoparticles as an efficient anode catalyst for direct conversion of dry sour methane in solid oxide fuel cells

Author affiliations

Abstract

In this work, we show that grafted metal oxide can be a highly cost-effective and active anode for solid oxide fuel cells for sour methane conversion. The developed electro-catalyst was composed of vanadium oxide grafted TiO2 nanoparticles (VOx/TiO2) infiltrated into a porous La0.4Sr0.5Ba0.1TiO3+δ electron-conductive composite. A number of chemisorbed vanadia species on TiO2 have been identified by XRD, FTIR, XPS and ToF-SIMS analyses; the morphologies of grafted TiO2 nanoparticles were characterized using SEM and TEM. The thermal stability of vanadia was greatly enhanced due to strong binding interaction with the support. In the chemical activity investigation using a fixed bed catalytic reactor, VOx/TiO2 showed significantly improved activity towards sour methane gas (0.5% H2S + CH4) oxidation in a diluted stream of oxygen. The electrochemical activity was determined using a SOFC that employed the VOx/TiO2 infiltrated titanate anode. This cell had a maximum power density of ∼160 mW cm−2 and a non-ohmic polarization resistance of <1 Ω cm2 in 0.5% H2S + CH4. Additionally, the performance of the novel anode material did not degrade during the 24 h test at 0.7 V with VOx/TiO2 suppressing coke formation on the anode.

Graphical abstract: Highly cost-effective and sulfur/coking resistant VOx-grafted TiO2 nanoparticles as an efficient anode catalyst for direct conversion of dry sour methane in solid oxide fuel cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Aug 2015, accepted on 24 Oct 2015 and first published on 28 Oct 2015


Article type: Paper
DOI: 10.1039/C5TA06453H
Citation: J. Mater. Chem. A, 2015,3, 23973-23980
  •   Request permissions

    Highly cost-effective and sulfur/coking resistant VOx-grafted TiO2 nanoparticles as an efficient anode catalyst for direct conversion of dry sour methane in solid oxide fuel cells

    A. Garcia, N. Yan, A. Vincent, A. Singh, J. M. Hill, K. T. Chuang and J. Luo, J. Mater. Chem. A, 2015, 3, 23973
    DOI: 10.1039/C5TA06453H

Search articles by author

Spotlight

Advertisements