Publication
751
J. Phys. Chem. C, 118 (25), 13377-13381, 2014
DOI:10.1021/jp500813r
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Cobalt-bisglyoximato diphenyl complex as a precatalyst for electrocatalytic H2 evolution. |
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Elodie Anxolabéhère-Mallart, Cyrille Costentin, Maxime Fournier, and Marc Robert
Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d’Electrochimie Moléculaire, Unité Mixte de Recherche Université - CNRS N° 7591, Bâtiment Lavoisier, 15 rue Jean de Baïf, 75205 Paris Cedex 13, France
Electrochemical investigation of the title CoII compound in acetonitrile with a strong acid (HClO4) showed no sign of proton catalysis at the CoII/CoI wave, but instead revealed the formation of Co based nanoparticles at the surface of the carbon electrode. Catalytic proton reduction of the resulting nanometer sized cobalt particles at pH 7 was found to occur efficiently. Partial coverage of the carbon substrate by the particles leads to an apparent exchange current density as high as those obtained at a pure cobalt electrode or cobalt films. |
