Title: A Promising Approach to the Synthesis of 3D Nanoporous Graphitic Carbon as a Unique Electrocatalyst Support for Methanol Oxidation
Authors: Tiwari, Jitendra N.
Tiwari, Rajanish N.
Chang, Yun-Min
Lin, Kun-Lin
Department of Materials Science and Engineering
Keywords: carbon;fuel cells;nanoporous materials;methanol oxidation;supported catalysts
Issue Date: 2010
Abstract: A 3D nanoporous graphitic carbon (g-C) material is synthesized by using an adamantane (C(10)H(16)) flame, and utilized to support a Pt(50)-Ru(50) alloy catalyst. The physico-chemical properties of the Pt(50)-Ru(50)/3D nanoporous g-C electrode are examined by a range of spectroscopy techniques as well as Brunauer-Emmett-Teller surface area analysis. Cyclic voltammetry measurements are used for electrochemical characterization of the Pt(50)-Ru(50)/3D nanoporous g-C electrode. The electrochemical investigations show that the supported Pt(50)-Ru(50) has excellent activity and stability towards methanol electro-oxidation. Good CO tolerance is also shown, and considered to be due to the presence of Ru nanoparticles. It is proposed that Ru is able to promote the oxidation of strongly adsorbed CO on Pt by supplying an oxygen source: RU(OH)(ad). Moreover, the presence of 3D nanopores in the g-C support may also contribute to the observed higher current density by virtue of the easy transport of methanol and the oxidation products through these nanopores.
URI: http://hdl.handle.net/11536/6119
ISSN: 1864-5631
DOI: 10.1002/cssc.200900223
Volume: 3
Issue: 4
Begin Page: 460
End Page: 466
Appears in Collections:Articles