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Catalysts 2017, 7(12), 379; doi:10.3390/catal7120379

Preparation of Ag4Bi2O5/MnO2 Corn/Cob Like Nano Material as a Superior Catalyst for Oxygen Reduction Reaction in Alkaline Solution

1
State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, China
2
National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Beijing University of Chemical Technology, Beijing 100029, China
*
Authors to whom correspondence should be addressed.
Received: 21 October 2017 / Revised: 30 November 2017 / Accepted: 30 November 2017 / Published: 6 December 2017
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Abstract

Ag4Bi2O5/MnO2 nano-sized material was synthesized by a co-precipitation method in concentrated KOH solution. The morphology characterization indicates that MnO2 nanoparticles with a size of 20 nm are precipitated on the surface of nano Ag4Bi2O5, forming a structure like corn on the cob. The obtained material with 60% Mn offers slightly higher initial potential (0.098 V vs. Hg/HgO) and limiting current density (−5.67 mA cm−2) at a rotating speed of 1600 rpm compared to commercial Pt/C (−0.047 V and −5.35 mA cm−2, respectively). Furthermore, the obtained material exhibits superior long-term durability and stronger methanol tolerance than commercial Pt/C. The remarkable features suggest that the Ag4Bi2O5/MnO2 nano-material is a very promising oxygen reduction reaction catalyst. View Full-Text
Keywords: fuel cells; manganese dioxide; silver bismuthate; alkaline; oxygen reduction reaction fuel cells; manganese dioxide; silver bismuthate; alkaline; oxygen reduction reaction
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Zeng, X.; Pan, J.; Sun, Y. Preparation of Ag4Bi2O5/MnO2 Corn/Cob Like Nano Material as a Superior Catalyst for Oxygen Reduction Reaction in Alkaline Solution. Catalysts 2017, 7, 379.

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