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Selective Chlorine Evolution Catalysts Based on Mg-Doped Nanoparticulate Ruthenium Dioxide

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    0435253 - ÚFCH JH 2016 RIV US eng J - Článek v odborném periodiku
    Abbott, D. F. - Petrykin, Valery - Okube, Maki - Bastl, Zdeněk - Mukerjee, S. - Krtil, Petr
    Selective Chlorine Evolution Catalysts Based on Mg-Doped Nanoparticulate Ruthenium Dioxide.
    Journal of the Electrochemical Society. Roč. 162, č. 1 (2015), H23-H31. ISSN 0013-4651. E-ISSN 1945-7111
    GRANT EU: European Commission(XE) 214936
    Institucionální podpora: RVO:61388955
    Klíčová slova: chlorine * electrochemistry * nanocrystalline Mg-doped ruthenium dioxide
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 3.014, rok: 2015

    Nanocrystalline Mg-doped ruthenium dioxide catalysts with the formula Ru1-xMgxO2 (0 ≤ x ≤ 20) were synthesized by the spray-freezing freeze-drying technique. Synthesized materials are of nanoparticulate nature and show a single phase diffraction pattern conforming to a tetragonal oxide of the rutile structural type. Magnesium ions are not distributed homogeneously in the material, but exist in Mg-rich clusters as shown by X-ray absorption spectroscopy. The refinement of the Mg EXAFS functions for materials with low Mg content shows that the magnesium rich clusters contain Mg in a highly strained environment similar to that of the rutile-type structure. The Mg environment shifts to an ilmenite-type inclusion when Mg occupies more than 10% of all cationic positions. All Mg modified materials are active in oxygen evolution and chlorine evolution reactions. Although the Mg containing catalysts show lower overall activities compared with the non-doped ruthenia, they feature enhanced selectivity toward the chlorine evolution process, which is attributed primarily to the opening of a reaction pathway for chlorine evolution associated with presence of Mg modified active sites.
    Trvalý link: http://hdl.handle.net/11104/0239137

     
     
Počet záznamů: 1  

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