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Issue 22, 2012
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Transition metal-doped rare earth vanadates: a regenerable catalytic material for SOFC anodes

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Abstract

The physical and electrochemical properties of cerium vandates in which a portion of the cerium cations have been substituted with transition metals (Ce1−xTMxVO4−0.5x, TM = Ni, Co, Cu) were investigated and their suitability for use in solid oxide fuel cell (SOFC) anodes was assessed. Similar to other transition metal doped perovskites, the metals were found to move out of and into the oxide lattice in response to exposure to reducing and oxidizing conditions at elevated temperatures. This process produces nanoparticle metal catalysts that decorate the surface of the conductive cerium vanadate. Solid oxide fuel cells (SOFC) with Ce1−xTMxVO3–YSZ composite anodes exhibited high electrochemical activity. It was also demonstrated that doping with the alkaline earth ions, Ca2+ and Sr2+ enhances the electronic conductivity of the vanadate and Ce0.7Sr0.1Ni0.2VO3–YSZ composite SOFC anodes were found to have both high electrochemical activity and unusually high redox stability.

Graphical abstract: Transition metal-doped rare earth vanadates: a regenerable catalytic material for SOFC anodes

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Publication details

The article was received on 21 Mar 2012, accepted on 26 Apr 2012 and first published on 27 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM31774E
Citation: J. Mater. Chem., 2012,22, 11396-11402
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    Transition metal-doped rare earth vanadates: a regenerable catalytic material for SOFC anodes

    L. Adijanto, V. Balaji Padmanabhan, R. Küngas, R. J. Gorte and J. M. Vohs, J. Mater. Chem., 2012, 22, 11396
    DOI: 10.1039/C2JM31774E

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