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The visible light photocatalytic H 2 evolution activities of a series of transition-metal substituted Keggin-structure heteropoly blues K 6 SiW 11 O 39 M(H 2 O)·nH 2 O (M=Co,Ni,Cu and Zn) were systematically studied with Pt nanoparticles as co-catalyst.The H 2 evolution rates were 150,98,65 and 48 mol h-1g-1 for SiW 11 Cu,SiW 11 Ni,SiW 11 Co and SiW 11 Zn,respectively,meaning that the order of photocatalytic activity of these heteropoly blues from transition-metal substituted polyoxometalates was:SiW 11 Cu > SiW 11 Ni > SiW 11 Co > SiW 11 Zn.The catalysts could be efficiently reused for at least 5 cycles.
The visible light photocatalytic H 2 evolution activities of a series of transition-metal substituted Keggin-structure heteropoly blues K 6 SiW 11 O 39 M (H 2 O) · nH 2 O (M = Co, Ni, Cu and Zn) were systematically studied with Pt nanoparticles as co-catalyst. The H 2 evolution rates were 150,98,65 and 48 mol h-1g-1 for SiW 11 Cu, SiW 11 Ni, SiW 11 Co and SiW 11 Zn, respectively, meaning that the order of photocatalytic activity of these heteropoly blues from transition-metal substituted polyoxometalates was: SiW 11 Cu> SiW 11 Ni> SiW 11 Co> SiW 11 Zn. The catalysts could be highly reused for at least 5 cycles.