New evidence for the regulation of photogenerated electron transfer on surface potential energy controlled co-catalyst on TiO2 - The investigation of hydrogen production over selectively exposed Au facet on Au/TiO2
文献类型：期刊论文
| 作者 | Cui ET(崔恩田)1,2 ; Lu GX(吕功煊)1
|
| 刊名 | International Journal of Hydrogen Energy
 |
| 出版日期 | 2014 |
| 卷号 | 39期号:15页码:7672-7685 |
| 关键词 | Photocatalytic hydrogen generation Au cocatalyst Selectively exposed facet Fermi level |
| ISSN号 | 0360-3199 |
| 通讯作者 | 吕功煊 |
| 英文摘要 | In this study, Au/TiO2 samples with different exposed facets ({100}, {100/111}, and {111}) of Au were employed as catalysts for the examination of facet-dependent catalytic activity toward photocatalytic hydrogen evolution from water. By photosensitized using Eosin Y as antenna molecule, Au/TiO2 series photocatalysts exhibited different photocatalytic hydrogen evolution performances under visible light irradiation. Au{111}/TiO2 photocatalyst presented the highest photocatalytic hydrogen generation activity among Au/TiO2 series samples. As evidenced by photoluminescence spectra, photocurrent, electrochemical impedance spectra, and Mott–Schottky characterizations, the difference in photocatalytic activities resulted from the different electron transfer rates from the conduction band of TiO2 to Au nanoparticles. Au nanoparticles with exposed {111} facets were more effective in trapping electrons due to their higher Fermi level. In addition, the apparent activation energy of Au{111}/TiO2 sample was the lowest, resulted from the biggest uncoordinated numbers of Au atoms on Au{111} nanoparticles, which was favor in forming the hydrogen–metal bond. This study discloses the facet-dependent effect of noble-metal cocatalyst on semiconductor photocatalysts in photocatalytic water reduction, and will give an insight into design and synthesis of high-efficient noble metal/semiconductor hybrid photocatalysts. |
| 学科主题 | 物理化学与绿色催化 |
| 收录类别 | SCI |
| 资助信息 | 863 Program of Department of Sciences and Technology of China (Grant No. 2012AA051501) |
| 语种 | 英语 |
| WOS记录号 | WOS:000336338500007 |
| 源URL | [http://210.77.64.217/handle/362003/18790]  |
| 专题 | 兰州化学物理研究所_OSSO国家重点实验室 兰州化学物理研究所_ERC国家工程研究中心 |
| 作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 10080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui ET,Lu GX. New evidence for the regulation of photogenerated electron transfer on surface potential energy controlled co-catalyst on TiO2 - The investigation of hydrogen production over selectively exposed Au facet on Au/TiO2[J]. International Journal of Hydrogen Energy,2014,39(15):7672-7685. |
| APA | Cui ET,&Lu GX.(2014).New evidence for the regulation of photogenerated electron transfer on surface potential energy controlled co-catalyst on TiO2 - The investigation of hydrogen production over selectively exposed Au facet on Au/TiO2.International Journal of Hydrogen Energy,39(15),7672-7685. |
| MLA | Cui ET,et al."New evidence for the regulation of photogenerated electron transfer on surface potential energy controlled co-catalyst on TiO2 - The investigation of hydrogen production over selectively exposed Au facet on Au/TiO2".International Journal of Hydrogen Energy 39.15(2014):7672-7685. |
入库方式： OAI收割
来源：兰州化学物理研究所
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