A highly dispersible, magnetically separable and environmentally friendly nano-sized catalyst for water oxidation. (2nd March 2016)

• Record Type: Journal Article
• Authors: Najafpour, Mohammad Mahdi; Salimi, Saeideh; Hołyńska, Małgorzata; Allakhverdiev, Suleyman I.
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 8(2016)
• Page Start: 4616
• Page End: 4623
• Publication Date: 2016-03-02
• Subjects: Artificial photosynthesis -- Heterogeneous catalyst -- Manganese oxide -- Water oxidation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.01.056
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The reaction of KMnO4 with cobalt nanoparticles coated with SiO2 layers forms a highly dispersible, magnetically separable and environmentally friendly catalyst toward water oxidation. The compound was characterized by scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, X-ray Photoelectron Spectroscopy, X-ray diffraction, electron spectroscopy, Fourier transform infrared spectroscopy and atomic absorption spectroscopy. The nano-sized catalyst shows self-healing in the presence of cerium(IV) ammonium nitrate and under the water-oxidation conditions. The turnover frequencies for the catalyst toward water oxidation in the presence of cerium(IV) ammonium nitrate and [Ru(bpy)3 ] 3+ are 0.15 and 0.25 (mmol O2 /mol Mn·s), respectively. Graphical abstract: The reaction of KMnO4 with cobalt nanoparticles coated with SiO2 layers forms a highly dispersible, magnetically separable and environmentally friendly catalyst toward water oxidation. Highlights: Using hydrogen to store sustainable energies is a promising strategy in the near future. Mn oxides are highly attractive as catalysts for water oxidation. We consider Mn oxide/SiO2 /cobalt nanoparticles as a water-oxidizing catalyst toward water oxidation. We report a dispersible, separable and environmentally friendly catalyst.