AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Synthesis of Pt-nanoparticles-Laden Graphene Crumples and Evaluation of Their Electrocatalytic Activity
HEE DONG JANG, Sun Kyung Kim, Hankwon Chang, Jeong Woo Choi, Jiayan Luo, Jiaxing Huang, Korea Institute of Geoscience and Mineral Resources
Abstract Number: 37 Working Group: Nanoparticles and Materials Synthesis
Abstract Pt-nanoparticles-laden graphene (GR) crumples was directly synthesized from a colloidal mixture of aqueous chloroplatinic acid (H2PtCl6) and graphene oxide (GO) nanosheets via aerosol spray pyrolysis (ASP). Effects of Pt content in the Pt/GR composite and temperature of heating zone on the particle morphology, diffraction pattern and specific surface area were investigated. The morphology of Pt/GR was the shape of a crumpled sheet of paper and the average size of the composite was around 1.3 µm in diameter. As Pt content increased from 2 to 20 wt %, higher numbers of Pt nanoparticles are observed on the GR at higher Pt content and the specific surface area of the composite also increased from 122 to 146 m2/g. Also, the intensity of the GR peak decreased but that of the Pt peak increased. As temperature increased from 500 to 900 oC, an increase of the particle size of Pt due to sintering was observed. Electrocatalytic application of the Pt/GR composites was examined through methanol oxidation reaction. The 20 wt% Pt/GR synthesized at 900 oC showed higher performance on methanol oxidation than a commercial 20 wt% Pt/carbon black catalyst.