A new photosensitive coordination compound [RuL(bpy)2](PF6)2 and its application in photocatalytic H2 production under the irradiation of visible light

A new organic-inorganic photosensitive coordination compound [RuL(bpy)(2)](PF6)(2) (to represent by TM1) had been synthesized by reaction of L (L = 2-hydroxyl-5-(imidazo-[4,5-f]-1,10-phenanthrolin) benzoic acid) with bipyridyl ruthenium, and further characterized by UV -vis, IR, NMR MS and CV. The target photocatalyst 6 wt% TM1-0.5 wt% Pt-TiO2 (I) was obtained by sensitization of Pt-loaded TiO2 with TM1. The H-2 production activity of target photocatalyst I was systematically evaluated by the reaction of photocatalytic H-2 production from water under visible light irradiation. The maximum H-2 evolution of 386.7 mu mol in irradiation 3 h and H-2 production rate of 2578 mu mol.h(-1).g(-1) was detected under the optimal conditions with pH 5, target photocatalyst I 50 mg and 5% sacrificial reagent TEOA (v/v). Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.