Nanosized manganese oxide/holmium oxide: A new composite for water oxidation
- Nanosized manganese oxide/holmium oxide: A new composite for water oxidation
- 채근화; Mohammad Mahdi Najafpour; Saeideh Salimi; Zahra Zand; Matgorzata Hotynska; Tatsuya Tomo; Jitendra Pal Singh; Suleyman I. Allakhverdiev
- water oxidation; manganese oxide; holmium oxide; scanning electron microscopy; extended edge X-ray absorption fine
structure; X-ray diffraction
- Issue Date
- New Journal of Chemistry; Nouveau journal de chimie
- VOL 41, NO 22-13741
- 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 1C. The turnover frequencies for the catalyst toward water oxidation in the presence of cerium(IV) ammonium nitrate and photo-produced tris(2,20-bipyridyl)ruthenium(III), [Ru(bpy)3]3+ are 0.12 and 0.04 (mmol O2 per mol Mn s), respectively. In addition, the catalyst shows selfhealing in the presence of cerium(IV) ammonium nitrate and under the water-oxidation conditions.
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