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题名: Synergetic effect of dual cocatalysts in photocatalytic H-2 production on Pd-IrOx/TiO2: a new insight into dual cocatalyst location
作者: Ma, Yi1, 2;  Chong, Ruifeng1, 2, 3;  Zhang, Fuxiang1, 2;  Xu, Qian1, 2;  Shen, Shuai1, 2, 3;  Han, Hongxian1, 2;  Li, Can1, 2
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2014-09-07
DOI: 10.1039/c4cp02567a
卷: 16, 期:33, 页:17734-17742
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Introducing appropriate dual cocatalysts is one of the most efficient strategies to improve the photocatalytic activity. Herein, we investigated the promotion effect of dual cocatalysts on TiO2 for hydrogen production. Compared with the Pd/TiO2 and Ir/TiO2 with the individual cocatalyst, TiO2 coloaded with Pd and Ir species exhibited an obviously enhanced H-2 production activity and reduced CO/H-2 ratio. XPS and IR spectra of CO adsorption analysis indicated that the dual cocatalysts on TiO2 were actually composed of Pd-0 and partially oxidized IrOx, which acted as the reduction and oxidation cocatalysts, respectively. Interestingly, EDX elemental mappings of Pd and Ir indicated that the two elements on TiO2 were inclined to depositing together. The synergetic effect of reduction and oxidation cocatalysts with their intimate contact is proposed to contribute to the high H-2 production activity, which is different from the common view that the reduction and oxidation sites should be spatially separated to avoid the charge recombination.
关键词[WOS]: VISIBLE-LIGHT IRRADIATION ;  HIGH QUANTUM EFFICIENCY ;  INDUCED WATER CLEAVAGE ;  HYDROGEN-PRODUCTION ;  OXYGEN EVOLUTION ;  PT-PDS/CDS ;  FT-IR ;  OXIDATION ;  DECOMPOSITION ;  CATALYST
语种: 英语
WOS记录号: WOS:000341064800042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145533
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Ma, Yi,Chong, Ruifeng,Zhang, Fuxiang,et al. Synergetic effect of dual cocatalysts in photocatalytic H-2 production on Pd-IrOx/TiO2: a new insight into dual cocatalyst location[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2014,16(33):17734-17742.
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