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Title: Hydrogen production using Pt-loaded TiO2 photocatalysts
Authors: López, Cristina R. 
Suárez Rodríguez, María Nereida 
Doña Rodríguez, José Miguel 
Navío Santos, José Antonio 
Fernández Hevia, D. 
Pulido Melián, Elisenda 
Ortega Méndez, José Alejandro 
González-Díaz, Óscar 
UNESCO Clasification: 2210 Química física
Keywords: TiO2
Pt, et al
Issue Date: 2013
Publisher: 0360-3199
Project: Sistema Completo de Caracterización de la Relación Entre Composición, Estructura y Fotoactividad de Sólidos Sintéticos Con Aplicaciones Fotocatalíticas. 
Journal: International Journal of Hydrogen Energy 
Abstract: A series of synthesised TiO2-based and commercial photocatalysts were modified by Pt photodeposition and a study made of their photocatalytic activity in hydrogen production. The modified commercial photocatalysts were Evonik P25, Kronos vlp7000 and Hombikat UV-100, and the other modified photocatalysts were synthesised by our group using sol–gel and sol–gel hydrothermal processes (SG400, SG750 and HT). Pt weight percentages used in the study were 0.5, 1.0 and 2.1 wt.% (Pt/TiO2). The photocatalysts were extensively characterised by X-ray diffraction (XRD), UV–vis diffuse reflectance, Brunauer–Emmett–Teller (BET) surface area measurement, transmission electron microscopy (TEM), scanning electron microscopy (SEM–EDX), Fourier transform infrared spectroscopy (FTIR) and laser light dispersion. Methanol (25% vol.) was used as sacrificial agent over the 8 h of the hydrogen production tests and measurements were taken of the final concentrations of formaldehyde and formic acid as well as initial and final TOC. Photoactivity of all photocatalysts increased in the presence of Pt. The most efficient of the synthesised photocatalysts was SG750 and of the commercial photocatalysts P25. Maximum production of SG750 was 1846 μmol h−1 at 1.0 wt.% Pt and its production per surface unit was notably higher than that of P25.
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2013.07.006
Source: International Journal Of Hydrogen Energy [ISSN 0360-3199], v. 38 (27), p. 11737-11748
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