Uniform decoration of Pt nanoparticles on well-defined CdSe tetrapods and the effect of their Pt cluster size on photocatalytic H2 generation

Younghun Sung; Jaehoon Lim; Jai Hyun Koh; Lawrence J. Hill; Byoung Koun Min; Jeffrey Pyun; Kookheon Char

doi:10.1039/C5CE01502B

Uniform decoration of Pt nanoparticles on well-defined CdSe tetrapods and the effect of their Pt cluster size on photocatalytic H₂ generation†

Younghun Sung,^ab Jaehoon Lim,^d Jai Hyun Koh,^e Lawrence J. Hill,^c Byoung Koun Min,^e Jeffrey Pyun*^bc and Kookheon Char*^ab

Author affiliations

* Corresponding authors

^a The National Creative Research Initiative Center for Intelligent Hybrids, Seoul National University, Seoul 08826, Republic of Korea
E-mail: khchar@snu.ac.kr

^b The World Class University (WCU) Program of Chemical Convergence for Energy & Environment, School of Chemical & Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea

^c Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, USA
E-mail: jpyun@email.arizona.edu

^d Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

^e Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

Abstract

Colloidal metal–semiconductor hybrid nanocrystals are of great interest due to their synergistic effect originating from multifunctionalities within a single nanocrystal for various applications. Among them, platinum-incorporated cadmium chalcogenide hybrid nanocrystals have been studied in the field of photocatalytic water splitting. Here, we present the direct decoration of Pt nanoparticles on CdSe tetrapod sidewalls synthesized by the continuous precursor injection (CPI) method. Pt-decorated CdSe tetrapods with different Pt nanoparticle sizes were synthesized and characterized by TEM, HR-TEM, XRD and HAADF-STEM. These tetrapods were employed as photocatalysts for the photocatalytic hydrogen generation reaction. The Pt-decorated CdSe tetrapods prepared with an extremely low amount of the Pt precursor showed the highest photocatalytic H₂ generation efficiency, which is believed to be attributed to the size effect of the Pt nanoparticles decorated on the CdSe tetrapod sidewalls.

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Article information

DOI: https://doi.org/10.1039/C5CE01502B
Article type: Communication
Submitted: 28 Jul 2015
Accepted: 07 Oct 2015
First published: 07 Oct 2015

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CrystEngComm, 2015,17, 8423-8427

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Uniform decoration of Pt nanoparticles on well-defined CdSe tetrapods and the effect of their Pt cluster size on photocatalytic H₂ generation

Y. Sung, J. Lim, J. H. Koh, L. J. Hill, B. K. Min, J. Pyun and K. Char, CrystEngComm, 2015, 17, 8423 DOI: 10.1039/C5CE01502B

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