Splitting water into hydrogen and oxygen is one of the most promising ways of storing solar energy in the future. In one half-reaction, water is oxidized to dioxygen, protons, and electrons. A new catalyst that efficiently facilitates water oxidation needs to be prepared. The goal of this work was to establish a new voltage-cycling protocol for electrodeposition of manganese oxide materials that oxidize water at low overpotential. Compounds based on manganese are desirable due to its low toxicity and the natural abundance. Various manganese complexes, additives including alkaline earth metals and lanthanides, and pH conditions were tested for the electrochemical deposition of active oxides. The catalytic activity was characterized by electrochemical methods, and the morphology was analyzed by scanning electron microscopy imaging to evaluate changes in the surface of the deposited catalysts.

Electrodeposition and structural characterization of water-oxidizing manganese oxides

245th National Meeting (2013)

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