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Catalysts 2016, 6(10), 165; doi:10.3390/catal6100165

One Pot Synthesis of Pt/Graphene Composite Using Polyamidoamine/Chitosan as a Template and Its Electrocatalysis for Methanol Oxidation

1
College of Chemistry & Chemical Engineering, Fujian Normal University, Fuzhou 350007, China
2
Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou 350007, China
*
Author to whom correspondence should be addressed.
Academic Editors: Vincenzo Baglio and David Sebastián
Received: 17 August 2016 / Revised: 18 October 2016 / Accepted: 19 October 2016 / Published: 24 October 2016
(This article belongs to the Special Issue Catalysis for Low Temperature Fuel Cells)
View Full-Text   |   Download PDF [3150 KB, uploaded 24 October 2016]   |  

Abstract

A one-pot hydrothermal strategy was used to synthesize Pt/GNs (PAMAM) & Pt/GNs (CS) composites. Pt nanoparticles are deposited onto graphene sheets (GNs) via synchronous reduction of K2PtCl4 and graphene oxide (GO) under hydrothermal conditons without additional reducing agent. During the synthesis process, polyamidoamine (PAMAM) or chitosan (CS) was used as a template respectively to obtain shape controlled Pt particles on the surface of GNs, leading to the formation of flower-like Pt nanoclusters for Pt/GNs (PAMAM) and uniform spherical Pt nanoparticles for Pt/GNs (CS). PAMAM and CS are simultaneously served as intrinsic reducing agents to accelerate reduction process; ensuring excellent electrical conductivity of the composites. Electrochemical tests show that Pt/GNs (PAMAM) and Pt/GNs (CS) have much higher electrocatalytic activity and better stability toward methanol oxidation reaction (MOR) in comparison with counterpart Pt/GNs and the commercially available 20% Pt/C catalyst (Pt/C) due to their better dispersion of Pt particles, stronger interaction between Pt and substrate materials, and better electron transfer capability. View Full-Text
Keywords: platinum; polyamidoamine; chitosan; graphene; methanol oxidation platinum; polyamidoamine; chitosan; graphene; methanol oxidation
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Wang, Y.; Li, Z.; Xu, S.; Lei, F.; Lin, S. One Pot Synthesis of Pt/Graphene Composite Using Polyamidoamine/Chitosan as a Template and Its Electrocatalysis for Methanol Oxidation. Catalysts 2016, 6, 165.

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