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学科主题: 物理化学
题名: Oxygen evolution from water oxidation on molecular catalysts confined in the nanocages of mesoporous silicas
作者: Li, Bo1;  Li, Fei2;  Bai, Shiyang1;  Wang, Zhijun1;  Sun, Licheng2;  Yang, Qihua1;  Li, Can1
通讯作者: 杨启华 ;  李灿
刊名: ENERGY & ENVIRONMENTAL SCIENCE
发表日期: 2012-08-01
DOI: 10.1039/c2ee22059h
卷: 5, 期:8, 页:8229-8233
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 506;503
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Multidisciplinary ;  Energy & Fuels ;  Engineering, Chemical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Engineering ;  Environmental Sciences & Ecology
英文摘要: Here, we report that the water oxidation activity can be significantly increased by confining ruthenium molecular catalysts, such as Ru-II(bda)(pic)(2), in the nanocage of SBA-16. The TOF of Ru-II(bda)(pic)(2) confined in the nanocage increased from 1.2 to 8.7 s(-1) by simply increasing the number of Ru-II(bda)(pic)(2) molecules from one to seven in each nanocage, which is direct evidence for the "cooperative activation" mechanism involved in a binuclear reaction pathway for water oxidation reactions. The TOF of Ru-II(bda)(pic)(2) confined in the nanocage can be as high as two times that of the homogeneous Ru-II(bda)(pic)(2) due to the enhanced "cooperative activation" in the limited space of nanocages. Moreover, preliminary kinetic studies suggest that the stability of the molecular catalysts can be greatly improved after confinement in the nanocage. This strategy not only provides a new strategy for the preparation of highly efficient solid-hosted catalysts for water oxidation, but also gives direct evidence for the oxygen evolution mechanism.
关键词[WOS]: MONONUCLEAR RUTHENIUM COMPLEXES ;  IRIDIUM COMPLEXES ;  EVOLVING CATALYST ;  DIMER COMPLEX ;  EFFICIENT ;  LIGAND ;  CHEMISTRY ;  ENERGY
语种: 英语
WOS记录号: WOS:000306571800017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118374
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, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China

Recommended Citation:
Li, Bo,Li, Fei,Bai, Shiyang,et al. Oxygen evolution from water oxidation on molecular catalysts confined in the nanocages of mesoporous silicas[J]. ENERGY & ENVIRONMENTAL SCIENCE,2012,5(8):8229-8233.
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