《A metal-free polymeric photocatalyst for hydrogen production from water under visible light-s》.pdfVIP

Supplementary information A metal-free, polymeric photocatalyst for hydrogen production from water under visible light 1,3* 2,4 1 2 2 Xinchen Wang , Kazuhiko Maeda , Arne Thomas , Kazuhiro Takanabe , Gang Xin , 5 2* 1* Johan M. Carlsson , Kazunari Domen , Markus Antonietti Methods Photocatalytic reaction. Reactions were carried out in a Pyrex top-irradiation reaction + vessel connected to a glass closed gas circulation system. Photoreduction of H to H2 and photooxidation of H O to O were performed separately in aqueous solutions 2 2 containing methanol or silver nitrate as sacrificial reagents, respectively. H2 production was performed by dispersing 0.1 g of g-C N catalyst powder in an aqueous solution 3 4 containing sacrificial electron donors such as triethanolamine and methanol (100 mL, 10 vol.%). In the case of deposition of Pt, an appropriate amount of H PtCl was dissolved 2 6 in the reactant solution24. For water photooxidation, 0.1 g of the catalyst and 0.2 g of La O powder were dispersed in the aqueous silver nitrate solution (0.01 M, 100 mL). 2 3 La O , a basic metal oxide, buffers the pH of the reactant solution to pH 8–9 during the 2 3 reaction. The reactant solution was evacuated several times to remove air completely prior to irradiation under a 300 W xenon lamp and a water filter. The wavelength of the incident light was controlled by using an appropriate cut-