The size and valence state effect of Pt on photocatalytic H2 evolution over platinized TiO2 photocatalyst

Photocatalytic hydrogen production from water or organic compounds is a promising way to resolve our energy crisis and environmental problems in the near future. Over the past decades, many photocatalysts have been developed for solar water splitting. However, most of these photocatalysts require co...

Full description

Saved in:
Bibliographic Details
Published in:International journal of hydrogen energy 2014-01, Vol.39 (3), p.1237-1242
Main Authors: Xing, Jun, Li, Yu Hang, Jiang, Hai Bo, Wang, Yun, Yang, Hua Gui
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Co-catalyst
Energy
Evolution
Exact sciences and technology
Fuels
Hydrogen
Hydrogen-based energy
Noble metals
Particle size
Photocatalysis
Platinum
Pt/TiO2
Size effect
Titanium dioxide
Valence state
Water splitting
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Photocatalytic hydrogen production from water or organic compounds is a promising way to resolve our energy crisis and environmental problems in the near future. Over the past decades, many photocatalysts have been developed for solar water splitting. However, most of these photocatalysts require cocatalyst to facilitate H2 evolution reaction and noble metals as key cocatalysts are widely used. Consequently, the condition of noble metal cocatalyst including the size and valence state etc plays the key role in such photocatalytic system. Here, the size and valence state effect of Pt on photocatalytic H2 evolution over platinized TiO2 photocatalyst were studied for the first time. Surprisingly, it was found that Pt particle size does not affect the photoreaction rate with the size range of several nanometers in this work, while it is mainly depended on the valence state of Pt particles. Typically, TOFs of TiO2 photodeposited with 0.1–0.2 wt% Pt can exceed 3000 h−1. •Size and valence state effect of Pt on photocatalysis was studied.•Pt particle size could cease to be determiner for photoreactivity.•Photocatalytic activity mainly depended on the valence state of Pt cocatalyst.•TOFs of TiO2 loaded with 0.1–0.2 wt% Pt with oxidized state can exceed 3000 h−1.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2013.11.041