Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 29, Pages 9909-9913Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201602078
Keywords
electrocatalysis; fuel cells; manganese; oxygen reduction reaction; porous materials
Categories
Funding
- National Natural Science Foundation of China [21271009, 21471006]
- Ministry of Education of China [20123424110002]
- Programs for Science and Technology Development of Anhui Province [1501021019]
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Preparing nonprecious metal catalysts with high activity in the oxygen reduction reaction (ORR) can promote the development of energy conversion devices. Support-free porous Mn2O3 was synthesized by a facile aerosol-spray-assisted approach (ASAA) and subsequent thermal treatment, and exhibited ORR activity that is comparable to commercial Pt/C The catalyst also exhibits notably higher activity than other Mn-based oxides, such as Mn3O4 and MnO2. The rotating ring disk electrode (RRDE) study indicates a typical 4-electron ORR pathway on Mn2O3. Furthermore, the porous Mn2O3 demonstrates considerable stability and a good methanol tolerance in alkaline media. In light of the low cost and high earth abundance of Mn, the highly active Mn2O3 is a promising candidate to be used as a cathode material in metal-air batteries and alkaline fuel cells.
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