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Highly Loaded Carbon Black Supported Pt Catalysts for Fuel Cells

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    0446903 - ÚCHP 2016 RIV NL eng J - Článek v odborném periodiku
    Kaluža, Luděk - Larsen, M.J. - Zdražil, Miroslav - Gulková, Daniela - Vít, Zdeněk - Šolcová, Olga - Soukup, Karel - Koštejn, Martin - Bonde, J.L. - Maixnerová, Lucie - Odgaard, M.
    Highly Loaded Carbon Black Supported Pt Catalysts for Fuel Cells.
    Catalysis Today. Roč. 256, NOV 1 (2015), s. 375-383. ISSN 0920-5861
    Grant CEP: GA MŠk(CZ) 7HX13003
    GRANT EU: European Commission(XE) 303466 - IMMEDIATE
    Institucionální podpora: RVO:67985858
    Klíčová slova: carbon black * fuell cell * electrocatalyst
    Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství
    Impakt faktor: 4.312, rok: 2015

    A commercial high surface area carbon black, low surface area carbon black and an experimental grade medium surface area carbon black (ExpCB, were studied assupports for platinum deposition: from true solutions of H2PtCl6, Pt(C5H7O2)2, Pt(NH3)4(NO3)2, orPt(NH3)2(NO2)2, and (ii) from fine slurries of Pt(C5H7O2)2or PtO2to achieve high Pt loadings of 60 wt.%.Temperature programmed reduction revealed that PtO2, H2PtCl6, Pt(C5H7O2)2, Pt(NH3)4(NO3)2,and Pt(NH3)2(NO2)2deposited on carbon blacks were reduced to metallic Pt at 0, 70, 120, 140, 150◦C,respectively. Cyclic voltammetry was carried out on electrodes prepared from selected catalyst mate-rials on a rotating-disc electrode. The electrochemically active surface area of the platinumand electrocatalytic activities towards the oxygen-reduction reaction were evaluated from the RDE measurements, in which also the stability towards electrochemical ageing was investigated. These analyses indicated that impregnation by H2PtCl6is the most suitable of the studied catalyst synthesismethods. Mass-specific ORR activities similar to that of commercial reference catalyst are obtained. Catalysts prepared on carbon ExpCB showed greater stability than those based on 350G.
    Trvalý link: http://hdl.handle.net/11104/0249853
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