Issue 2, 2016

Facile fabrication of thermally reduced graphene oxide–platinum nanohybrids and their application in catalytic reduction and dye-sensitized solar cells

Abstract

We report the fast synthesis of thermally reduced graphene oxide : platinum (TRGO : Pt) nanohybrids by simply spraying a GO:Pt4+ solution on a hot plate. X-ray photoelectron spectroscopy and atomic force microscopy analyses are performed to investigate the thermal reduction of GO:Pt4+ and the morphologies of the TRGO : Pt hybrid monolayer, respectively. The catalytic performance of TRGO : Pt is evaluated for the reduction of o-nitroaniline. A significant increase in the reaction rate constant for TRGO : Pt compared with pure Pt is due to facilitated electron transfer at the TRGO : Pt interface and enhanced catalytic active sites. Effective electron transfer from TRGO to Pt and significantly increased catalytic active sites in hybrids suggest that TRGO : Pt is a highly potential counter electrode material in dye-sensitized solar cells (DSSCs). The hybrid provides numerous electrons to I/I3 electrolyte to reduce the recombination at the interface. As a result, the performance of DSSCs with the TRGO : Pt hybrid electrode is significantly increased by 34% in comparison with a pure Pt electrode.

Graphical abstract: Facile fabrication of thermally reduced graphene oxide–platinum nanohybrids and their application in catalytic reduction and dye-sensitized solar cells

Supplementary files

Article information

Article type
Paper
Submitted
20 Oct 2015
Accepted
16 Dec 2015
First published
21 Dec 2015

RSC Adv., 2016,6, 1535-1541

Author version available

Facile fabrication of thermally reduced graphene oxide–platinum nanohybrids and their application in catalytic reduction and dye-sensitized solar cells

N. T. Khoa, D. V. Thuan, S. W. Kim, S. Park, T. V. Tam, W. M. Choi, S. Cho, E. J. Kim and S. H. Hahn, RSC Adv., 2016, 6, 1535 DOI: 10.1039/C5RA21896A

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