Partially Oxidized Sub-10 nm MnO Nanocrystals with High Activity for Water Oxidation Catalysis

The oxygen evolution reaction (OER) is considered a major bottleneck in the overall water electrolysis process. In this work, highly active manganese oxide nano-catalysts were synthesized via hot injection. Facile surface treatment generated Mn(III) species on monodisperse 10 nm MnO nanocrystals (NC...

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Published inScientific reports Vol. 5; no. 1; p. 10279
Main Authors Jin, Kyoungsuk, Chu, Arim, Park, Jimin, Jeong, Donghyuk, Jerng, Sung Eun, Sim, Uk, Jeong, Hui-Yun, Lee, Chan Woo, Park, Yong-Sun, Yang, Ki Dong, Kumar Pradhan, Gajendra, Kim, Donghun, Sung, Nark-Eon, Hee Kim, Sun, Nam, Ki Tae
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 22.05.2015
Nature Publishing Group
Subjects
639/301/299/886
639/638/77/886
639/925/357/354
Catalysis
Catalysts
Crystals
Electrolysis
Humanities and Social Sciences
Manganese
multidisciplinary
Nanocrystals
Oxidation
Science
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Summary:The oxygen evolution reaction (OER) is considered a major bottleneck in the overall water electrolysis process. In this work, highly active manganese oxide nano-catalysts were synthesized via hot injection. Facile surface treatment generated Mn(III) species on monodisperse 10 nm MnO nanocrystals (NCs). Size dependency of MnO NCs on OER activity was also investigated. Surprisingly, the partially oxidized MnO NCs only required 530 mV @ 5 mA cm −2 under near neutral conditions.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep10279