Resumo

FERNANDEZ-VALVERDE, Suilma Marisela; ORDONEZ-REGIL, Eduardo; CABANAS-MORENO, Gerardo  e  SOLORZA-FERIA, Omar. Electrochemical Behavior of Ni-Mo Electrocatalyst for Water Electrolysis. J. Mex. Chem. Soc [online]. 2010, vol.54, n.3, pp.169-174. ISSN 1870-249X.

Nickel-molybdenum based electrolcatalysts were synthesized in organic media for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media. The strutture, morphology, and chemical composition of the catalysts were evaluated by XRD, SEM and AAS. Results revealed nanocristalline powder materials with Ni_0.006Mo, Ni_0.1Mo, and NiMo compositions. The best performance for HER, was obtained on Ni_0.1Mo electrode, whereas NiMo was for the OER. Results suggest that the material with 1: 1 stoichiometric ratio could be considered as a promising electrocatalyst for OER. This nanotrystalline powder is formed by Ni₂Mo₃O₈ and a crystalline structure attributed to the possible formation of a NiMo cluster, becomes NiMoO₄ after thermal treatment at 1073K in air. The NiMo 1:1 cluster catalyst presented electrochemical stability during the OER.

Palavras-chave : NiMo materials; organic chemital synthesis; electrochemical properties; hydrogen evolution reaction; oxygen evolution reaction.