Abstract
Energy and environmental concerns related to the use of fossil fuels have forced researchers to seek renewable and clean energy resources. The demand of this energy encourages to study artificial photosynthesis, in which high-energy compounds are produced from water as an electron donor, by utilizing solar energy [1,2,5]. In a quest to develop sustainable energy conversion processes, many research groups have attempted water splitting using sunlight, which occurs in two processes: water oxidation or oxygen evolution reaction (OER) and water reduction or hydrogen evolution reaction (HER). However, oxidation of water to produce O2 is challenging from both thermodynamic and kinetic points of view, and thus, this process is considered too important for water splitting [3,4]. It is important to study the catalytic activity of different catalysts, especially when using sustainable and cheaper semiconductors for the oxidation of photoactivated water. This work presents the synthesis, characterization of catalysts derived from nitroprussides as new materials for photocatalytic for oxygen evolution reaction [5]. Our attempts to use electrocatalysts derived from Nitroprussides (Np) M[Fe(CN)5NO] where M = Fe2+, Mn2+, Co2+ and Ni2+, in photocatalytic water oxidation (pH 7.2) using [Ru(bpy)3]2+ (bpy = 2,2'-bipyridine) as a sensitizer and Na2S2O8 as an electron acceptor [2], will be discussed in this presentation.
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