A binder-free thin film anode composed of Co2 +-intercalated buserite grown on carbon cloth for oxygen evolution reaction |
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| Institution: | 1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;2. Institute for Advanced Studies, Wuhan University, Wuhan 430072, China;1. School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, South Korea;2. Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-60, South Korea |
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| Abstract: | We present a binder-free catalytic anode for highly efficient and stable oxygen evolution reaction in alkaline media. The catalyst consists of a thin film of buserite-type layered manganese dioxide (MnO2) intercalated with Co2 + ions, resulting from electrodeposition of the layered MnO2 film with tetrabutylammonium (Bu4N+) ions on a carbon cloth, followed by ion-exchange of the initially incorporated Bu4N+ with Co2 + in solution. The electrode is capable to produce a current density of 10 mA cm? 2 at an overpotential (η) of 377 mV with a Tafel slope of 48 mV dec? 1, much superior to the layered MnO2 without Co2 +. |
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