Nanosized manganese oxide/holmium oxide: a new composite for water oxidation. (23rd October 2017)

• Record Type: Journal Article
• Authors: Najafpour, Mohammad Mahdi; Salimi, Saeideh; Zand, Zahra; Hołyńska, Małgorzata; Tomo, Tatsuya; Singh, Jitendra Pal; Chae, Keun Hwa; Allakhverdiev, Suleyman I.
• Is Part Of: New journal of chemistry. Volume 41:Number 22(2017)
• Page Start: 13732
• Page End: 13741
• Publication Date: 2017-10-23
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c7nj02747h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Ho2 O3 as a support for nanosized Mn oxide was used for the synthesis of a new water-oxidizing catalyst. 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 °C. The turnover frequencies for the catalyst toward 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 per 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.