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Photo-induced reforming of alcohols with improved hydrogen apparent quantum yield on TiO2 nanotubes loaded with ultra-small Pt nanoparticles |
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| Authors: | Mariana P Languer Francine R Scheffer Adriano F Feil Daniel L Baptista Pedro Migowski Guilherme J Machado Diogo P de Moraes Jairton Dupont Sérgio R Teixeira Daniel E Weibel |
| Affiliation: | 1. Instituto de Química, Universidade Federal do Rio Grande do Sul, UFRGS, Avenida Bento Gonçalves 9500, P.O. Box 15003, 91501-970 Porto Alegre, RS, Brazil;2. Instituto de Física, Universidade Federal do Rio Grande do Sul, UFRGS, Avenida Bento Gonçalves 9500, P.O. Box 15051, 91501-970 Porto Alegre, RS, Brazil;3. Faculdade de Física, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6681, 90619-900 Porto Alegre, RS, Brazil |
| Abstract: | Photo-induced reforming of methanol, ethanol, glycerol and phenol at room temperature for hydrogen production was investigated with the use of ultra-small Pt nanoparticles (NPs) loaded on TiO2 nanotubes (NTs). The Pt NPs with diameters between 1.1 and 1.3 nm were deposited on TiO2 NTs by DC-magnetron sputtering (DC-MS) technique. The photocatalytic hydrogen rate achieved an optimum value for a loading of about 1 wt% of Pt. Apparent quantum yield for hydrogen generation was measured for methanol and ethanol water solutions reaching a maximum of 16% under irradiation with a wavelength of 313 nm in methanol/water solution (1/8 v/v). Pt NPs loaded on TiO2 NTs represented also a true water splitting catalyst under UV irradiation and pure distilled water. DC-MS method appears to be a technologically simple, ecologically benign and potentially low-cost process for production of an efficient photocatalyst loaded with ultra-small NPs with precise size control. |
| Keywords: | Photocatalysis Water splitting Hydrogen production TiO2 nanotubes Platinum Apparent quantum yield |
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