A series of catalysts were synthesized by deposition of transition metal oxides (MnO2, CoO, NiO, etc.) on carbon nanotubes (CNTs) for bifunctional catalysis in alkaline media. The metal oxides were deposited onto the CNTs by an improved impregnation method. This synthetic method allowed metal agglomerations to be limited as well as providing maximum active sites per catalyst mass. The catalysts were comprehensively characterized by BET, SEM, TEM, and XRD methods. Catalytic activity was measured in both ORR and OER by RDE experiment. The influence of various metal oxides was investigated. It was found that the resulting catalysts are stable in alkaline media, have high surface area, are easy to synthesize and have high bifunctional electrocatalytic activity � both for the oxygen reduction reactions (ORR) and oxygen evolution reactions (OER).

Metal oxides/CNT nano-composite catalysts for oxygen reduction and oxygen evolution in alkaline media

245th National Meeting (2013)

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