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Vectorial Electron Transfer for Improved Hydrogen Evolution by Mercaptopropionic-Acid-Regulated CdSe Quantum-Dots-TiO2-Ni(OH)(2) Assembly
Yu, S; Li, ZJ; Fan, XB; Li, JX; Zhan, F; Li, XB; Tao, Y; Tung, CH; Wu, LZ; Zhan F(展飞); Tao Y(陶冶)
2015
发表期刊CHEMSUSCHEM
卷号8期号:4页码:642-649
文章类型Article
摘要A visible-light-induced hydrogen evolution system based on a CdSe quantum dots (QDs)-TiO2-Ni(OH)(2) ternary assembly has been constructed under an ambient environment, and a bifunctional molecular linker, mercaptopropionic acid, is used to facilitate the interaction between CdSe QDs and TiO2. This hydrogen evolution system works effectively in a basic aqueous solution (pH11.0) to achieve a hydrogen evolution rate of 10.1mmolg(-1)h(-1) for the assembly and a turnover frequency of 5140h(-1) with respect to CdSe QDs (10h); the latter is comparable with the highest value reported for QD systems in an acidic environment. X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and control experiments demonstrate that Ni(OH)(2) is an efficient hydrogen evolution catalyst. In addition, inductively coupled plasma optical emission spectroscopy and the emission decay of the assembly combined with the hydrogen evolution experiments show that TiO2 functions mainly as the electron mediator; the vectorial electron transfer from CdSe QDs to TiO2 and then from TiO2 to Ni(OH)(2) enhances the efficiency for hydrogen evolution. The assembly comprises light antenna CdSe QDs, electron mediator TiO2, and catalytic Ni(OH)(2), which mimics the strategy of photosynthesis exploited in nature and takes us a step further towards artificial photosynthesis.
关键词electron transfer hydrogen nickel photosynthesis quantum dots
学科领域Chemistry
DOI10.1002/cssc.201402885
收录类别SCI ; EI
WOS类目Chemistry, Multidisciplinary
WOS记录号WOS:000349954400011
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228274
专题多学科研究中心
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GB/T 7714
Yu, S,Li, ZJ,Fan, XB,et al. Vectorial Electron Transfer for Improved Hydrogen Evolution by Mercaptopropionic-Acid-Regulated CdSe Quantum-Dots-TiO2-Ni(OH)(2) Assembly[J]. CHEMSUSCHEM,2015,8(4):642-649.
APA Yu, S.,Li, ZJ.,Fan, XB.,Li, JX.,Zhan, F.,...&陶冶.(2015).Vectorial Electron Transfer for Improved Hydrogen Evolution by Mercaptopropionic-Acid-Regulated CdSe Quantum-Dots-TiO2-Ni(OH)(2) Assembly.CHEMSUSCHEM,8(4),642-649.
MLA Yu, S,et al."Vectorial Electron Transfer for Improved Hydrogen Evolution by Mercaptopropionic-Acid-Regulated CdSe Quantum-Dots-TiO2-Ni(OH)(2) Assembly".CHEMSUSCHEM 8.4(2015):642-649.
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