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

Kyoungsuk Jin; Arim Chu; Jimin Park; Donghyuk Jeong; Sung Eun Jerng; Uk Sim; Hui-Yun Jeong; Chan Woo Lee; Yong-Sun Park; Ki Dong Yang; Gajendra Kumar Pradhan; Donghun Kim; Nark-Eon Sung; Sun Hee Kim; Ki Tae Nam

doi:10.1038/srep10279

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

Sci Rep. 2015 May 22:5:10279. doi: 10.1038/srep10279.

Authors

Affiliations

¹ 1] Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea [2] Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 151-744, Korea.
² Division of Materials Science, Korea Basic Science Institute, Daejeon, 305-333, Korea.
³ Pohang Accelerator Laboratory, POSTECH, Pohang, 790-784, South Korea.

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't