Arm length dependency of Pt-decorated CdSe tetrapods on the performance of photocatalytic hydrogen generation

Younghun Sung; Jaehoon Lim; Jai Hyun Koh; Byoung Koun Min; Jeffrey Pyun; Kookheon Char

Korean Journal of Chemical Engineering, Vol.33, No.8, 2287-2290, August, 2016

DOI10.1007/s11814-016-0200-9 Export Citation

Arm length dependency of Pt-decorated CdSe tetrapods on the performance of photocatalytic hydrogen generation

Younghun Sung^{1, 2}, Jaehoon Lim³, Jai Hyun Koh⁴, Byoung Koun Min⁴, Jeffrey Pyun^{2, 5, †}, and Kookheon Char^{1, 2, †}

¹The National Creative Research Initiative (CRI) Center for Intelligent Hybrids, Seoul National University, Seoul 08826, Korea
²The WCU Program of Chemical Convergence for Energy & Environment, School of Chemical & Biological Engineering, Seoul National University, Seoul 08826, Korea
³Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A., USA
⁴Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
⁵Department of Chemistry & Biochemistry, University of Arizona, Tucson, AZ 85721, U.S.A., Korea

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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.

Keywords:Colloidal Heterostructured Nanocrystal;CdSe Tetrapod;Photocatalytic Hydrogen Generation

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