globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.04.042
论文题名:
Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products
作者: Wei D.; Tan Y.; Wang Y.; Kong T.; Shen S.; Mao S.S.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:16
起始页码: 1389
结束页码: 1395
语种: 英语
中文关键词: Metal/semiconductor junction ; Photocatalysis ; Product selectivity ; Reaction pathway ; Water splitting
英文关键词: Electrons ; Hot electrons ; Hydrogen production ; Metal nanoparticles ; Oxidation ; Product design ; Rational functions ; TiO2 nanoparticles ; Titanium dioxide ; Controlled waters ; Cu nano-particles ; Four-electron process ; Irradiation wavelength ; Rational design ; Reaction pathways ; TiO2-based photocatalysts ; Two-electron process ; Copper
英文摘要: A novel metal/semiconductor photocatalyst, Cu nanoparticles (NPs) modified TiO2 hollow spheres (Cu/TiO2), was designed for efficient photocatalytic overall water splitting (POWS) under both ultraviolet (UV) and visible (Vis) light. This Cu/TiO2 photocatalyst possesses excellent POWS performance under Vis light at the highest level among the reported TiO2-based photocatalysts. Interestingly, the metal/semiconductor junction formed between Cu and TiO2 enables controlled water-oxidation product selectivity (H2O2 or O2) via different reaction pathways regulated by irradiation wavelengths. Under UV light, the electrons excited in TiO2 are captured by Cu NPs through the Cu/TiO2 Schottky interface for H2 production, with the photoholes in TiO2 producing H2O2 through a two-electron process; whilst under Vis light, Cu NPs act as plasmon to inject hot electrons to TiO2 for H2 production, while O2 is produced by hot holes on Cu NPs via a four-electron process. This rational design of function-switchable metal/semiconductor junction may be helpful to understand the mechanisms for POWS with desired gas/liquid water-oxidation products. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170085
Appears in Collections:气候变化与战略

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作者单位: International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an, 710054, China; Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720, United States

Recommended Citation:
Wei D.,Tan Y.,Wang Y.,et al. Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products[J]. Science Bulletin,2020-01-01,65(16)
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