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Nanosized manganese oxide/holmium oxide: A new composite for water oxidation

Abstract

Herein, holmium oxide as a support for nanosized Mn oxide was used toward the synthesis of a new catalyst for water oxidation. A composite of Mn and Ho oxide was synthesized by a simple hydrothermal procedure and characterized by scanning electron microscopy, extended edge X-ray absorption fine structure, transmission electron microscopy, powder X-ray diffraction, and electrochemical methods. The effect of calcination temperature on the composite performance for the water-oxidation process was examined in the range of 100-600 oC. The turnover frequencies for the catalyst towards water oxidation in the presence of cerium(IV) ammonium nitrate and photo-produced Tris (2,2′-bipyridyl) ruthenium(III), [Ru(bpy)3]3+, are 0.12 and 0.04 (mmol O2/mol Mn•s), respectively. In addition, the catalyst shows self-healing in the presence of cerium(IV) ammonium nitrate and under the water-oxidation conditions.

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Publication details

The article was received on 26 Jul 2017, accepted on 26 Sep 2017 and first published on 28 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02747H
Citation: New J. Chem., 2017, Accepted Manuscript
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    Nanosized manganese oxide/holmium oxide: A new composite for water oxidation

    M. M. Najafpour, S. Salimi, Z. Zand, M. Holynska, T. Tomo, J. P. Singh, K. H. Chae and S. I. Allakhverdiev, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02747H

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