title: Nanostructured manganese oxide on silica aerogel: a new catalyst toward water oxidation.
abstract: Herein we report on the synthesis and characterization of nano-sized Mn oxide/silica aerogel with low density as a good catalyst toward water oxidation. The composite was synthesized by a simple and low-cost hydrothermal procedure. In the next step, we studied the composite in the presence of cerium(IV) ammonium nitrate and photo-produced Ru(bpy)33+as a water-oxidizing catalyst. The low-density composite is a good Mn-based catalyst with turnover frequencies of ~0.3 and 0.5 (mmol O2/(mol Mn·s)) in the presence of Ru(bpy)33+and cerium(IV) ammonium nitrate, respectively. In addition to the water-oxidizing activities of the composite under different conditions, its self-healing reaction in the presence of cerium(IV) ammonium nitrate was also studied.
authors.affiliation: Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran. mmnajafpour@iasbs.ac.ir.|Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran. mmnajafpour@iasbs.ac.ir.
authors.forename: Mohammad Mahdi
authors.initials: MM
authors.lastname: Najafpour
authors.affiliation: Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran.
authors.forename: Saeideh
authors.initials: S
authors.lastname: Salimi
authors.affiliation: Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran.
authors.forename: Sepideh
authors.initials: S
authors.lastname: Madadkhani
authors.affiliation: Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032, Marburg, Germany.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Hołyńska
authors.affiliation: Department of Biology, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo, 162-8601, Japan.|PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama, 332-0012, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Tomo
authors.affiliation: Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow, Russia, 127276. suleyman.allakhverdiev@gmail.com.|Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290. suleyman.allakhverdiev@gmail.com.|Department of Plant Physiology, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow, Russia, 119991. suleyman.allakhverdiev@gmail.com.
authors.forename: Suleyman I
authors.initials: SI
authors.lastname: Allakhverdiev
mesh_terms: D002384:Catalysis; D017895:Manganese Compounds / Q000737:chemistry / Q000378:metabolism*; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry / Q000378:metabolism*; D058428:Silica Gel / Q000737:chemistry; D014867:Water / Q000378:metabolism*
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D014867:Water; D058428:Silica Gel; C027424:manganese oxide
keywords: Artificial photosynthesis; Nano-sized manganese oxide; Oxygen; Self-healing; Silica aerogel; Water oxidation