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Arm length dependency of Pt-decorated CdSe tetrapods on the performance of photocatalytic hydrogen generation |
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| Authors: | Younghun Sung Jaehoon Lim Jai Hyun Koh Byoung Koun Min Jeffrey Pyun Kookheon Char |
| Affiliation: | 1.The National Creative Research Initiative (CRI) Center for Intelligent Hybrids,Seoul National University,Seoul,Korea;2.The WCU Program of Chemical Convergence for Energy & Environment, School of Chemical & Biological Engineering,Seoul National University,Seoul,Korea;3.Department of Chemistry & Biochemistry,University of Arizona,Tucson,USA;4.Clean Energy Research Center,Korea Institute of Science and Technology (KIST),Seoul,Korea;5.Chemistry Division,Los Alamos National Laboratory,Los Alamos,USA |
| Abstract: | Pt-decorated CdSe tetrapods with different arm lengths were tested for the photocatalytic hydrogen generation reaction. Well-defined CdSe tetrapods with controlled wurtzite arm lengths were synthesized by the continuous precursor injection (CPI) approach. Pt nanocrystals with an extremely small size of ～1 nm were directly decorated on the overall surfaces of CdSe tetrapods. Ligand-exchanged Pt-decorated CdSe tetrapods with different arm lengths were employed as photocatalysts for photocatalytic hydrogen generation reaction in the presence of hole scavengers. Pt-decorated CdSe tetrapods with shorter arm length showed the highest photocatalytic efficiency, which is due to higher probability of charge separation. |
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