A Novel Photocatalytic System Constructed Using Eosin Y, Titanium Dioxide, and Keggin-Type Platinum(II)- and Aluminum(III)-Coordinated Polyoxotungstates for Hydrogen Production from Water Under Visible Light Irradiation

A novel photocatalytic system constructed using Eosin Y, α-Keggin-type diplatinum(II)-coordinated tungstophosphate Cs3[α-PW11O39{cis-Pt(NH3)2}2]·8H2O (Cs-Pt-1), α-Keggin-type mono-aluminum(III)-coordinated tungstosilicate K5[α-SiW11{Al(OH2)}O39]·7H2O (K-Al-1), and titanium dioxide achieved a steady rate of hydrogen evolution with highly effective utilization of platinum sites from aqueous triethanolamine solution during a long-term visible light irradiation.