Efficient Photocatalytic Hydrogen Evolution from Water without an Electron Mediator over Pt-Rose Bengal Catalysts

被引：88

作者：

Zhang, Xiaojie ^{[1
,3
]}

Jin, Zhiliang ^{[1
]}

Li, Yuexiang ^{[2
]}

Li, Shuben ^{[1
]}

Lu, Gongxuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China

[2] Nanchang Univ, Dept Chem, Nanchang 330047, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100101, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 06期

基金：

中国国家自然科学基金;

关键词：

VISIBLE-LIGHT IRRADIATION; XANTHENE DYES; QUANTUM YIELD; GENERATION; REDUCTION; FLUORESCENCE; TIO2; PHOTOSENSITIZATION; NANOPARTICLES; AGGREGATION;

D O I：

10.1021/jp8085717

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A highly efficient visible-light-induced hydrogen evolution system without an electron mediator such as methyl viologen, constructed with rose bengal as a photosensitizer, triethanolamine (TEA) as an electron donor, and Pt as a cocatalyst, has been reported. Under visible light irradiation (lambda >= 420 nm), the highest rate of hydrogen evolution and apparent quantum efficiency are about 56.9 mu mol h(-1) and 11.3%, respectively. According to the effects of urea and ionic strength on the activity of hydrogen evolution, the dimers of rose bengal play a significant role in the photosensitized hydrogen evolution process. On the basis of activity tests and UV-vis absorbance and fluorescence measurements, the probable mechanism for photosensitized hydrogen evolution has been postulated.

引用

页码：2630 / 2635

页数：6

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