气候变化领域集成服务门户(CCPortal): Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products

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DOI	10.1016/j.scib.2020.04.042
	Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products
	Wei D.; Tan Y.; Wang Y.; Kong T.; Shen S.; Mao S.S.
发表日期	2020
ISSN	20959273
起始页码	1389
结束页码	1395
卷号	65 期号:16
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
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
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207230
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
推荐引用方式 GB/T 7714	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],2020,65(16).
APA	Wei D.,Tan Y.,Wang Y.,Kong T.,Shen S.,&Mao S.S..(2020).Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products.Science Bulletin,65(16).
MLA	Wei D.,et al."Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products".Science Bulletin 65.16(2020).