Visible Light Photocatalytic Activity of Pt/N‐TiO₂ towards Enhanced H₂ Production from Water Splitting

Abstract

Abstract Present work mainly focuses on experimental investigation to improvement of hydrogen production by water photoelectrolysis. An experimental facility was designed and constructed for visible light photocatalysis. A series of N‐TiO 2 photocatalysts impregnated with platinum on the surface of N‐TiO 2 were prepared. Hydrogen production upon irradiating aqueous Pt/N‐TiO 2 suspension with visible light was investigated. The shift in excitation wavelength of TiO 2 was 380 nm improved the yield of hydrogen production by N‐TiO 2 and Pt/N‐TiO 2 . We used a 400 W mercury arc lamp combined with a 400 nm cutoff filter eliminating all the wavelengths under 400 nm. Pt/N‐TiO 2 material was characterized with TPR, reflective UV/Visible spectroscopy and TEM. The best hydrogen production rate obtained for this setup for N/Ti = 10, 0.05 wt% Pt/N‐TiO 2 , through water splitting was about 772 μmolh −1 g −1 .