Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/45776
標題: Photocatalytic properties of redox-treated Pt/TiO(2) photocatalysts for H(2) production from an aqueous methanol solution
作者: Huang, B.S.
魏銘彥
Chang, F.Y.
Wey, M.Y.
關鍵字: Pt
H(2)
Photocatalysts
Oxidation
Reduction
PtO/TiO(2)
sol-gel process
hydrogen evolution
surfactant template
tio2
photocatalysts
aliphatic-alcohols
nanoparticles
decomposition
generation
catalyst
anatase
期刊/報告no:: International Journal of Hydrogen Energy, Volume 35, Issue 15, Page(s) 7699-7705.
摘要: The influence of redox-treated Pt/TiO(2) photocatalysts on H(2) production is investigated. Catalyst characterizations are performed by TEM, XPS, XRD, BET, and UV-vis/DR spectroscopy techniques. In terms of production rate, the oxidation treatment shows higher reactivity than the reduction treatment. The reduction treatment allows the formation of metallic Pt(0), which more easily catalyzes the transition of TiO(2) from the anatase to the rutile phases. Reduction-treated Pt/TiO(2) photocatalysts have lower S(BET) values than oxidation-treated Pt/TiO(2) photocatalysts due to the higher percentage of TiO(2) in the rutile phase. Combining the results of XPS and optical analyses, PtO/TiO(2) shows a higher energy band gap than metallic Pt(0)/TiO(2), indicating that oxidation-treated Pt/TiO(2) is more capable of achieving water splitting for H(2) production. According to the results of this study, the oxidation treatment of Pt/TiO(2) photocatalysts can significantly enhance the reactivity of photocatalytic H(2) production because of their homogenous distribution, lower phase transition, higher S(BET), and higher energy band gap. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/45776
ISSN: 0360-3199
文章連結: http://dx.doi.org/10.1016/j.ijhydene.2010.05.103
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