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Synthesis of Mesoporous Pt-Au Alloy Electrode by Electrodeposition Method for Direct Methanol Fuel Cell  

Park, Eun-Kyung (Regional Innovation Center for Environmental Technology of Thermal Plasma (ETTP), Inha University)
Ahn, Jae-Hoon (Department of Chemistry, BK School of Molecular Science, Pohang University of Science and Technology)
Kim, Young-Soo (Regional Innovation Center for Environmental Technology of Thermal Plasma (ETTP), Inha University)
Kim, Kyung-Hwa (Regional Innovation Center for Environmental Technology of Thermal Plasma (ETTP), Inha University)
Baeck, Sung-Hyeon (Regional Innovation Center for Environmental Technology of Thermal Plasma (ETTP), Inha University)
Publication Information
Korean Chemical Engineering Research / v.46, no.4, 2008 , pp. 727-731 More about this Journal
Abstract
Mesoporous Pt-Au alloy films were successfully fabricated on ITO-coated glass by electrodeposition method using tri-blockcopolymer (P123) as a templating agent. The electrolyte consisted of 10 mM hydrogen hexachloroplatinate ($H_2PtCl_6$), 10 mM hydrogen tetrachloroaurate ($HAuCl_4$), and proper amount of P123. For comparison, control samples were electrodeposited without $HAuCl_4$ and P123. Film composition was determined by EDS(Energy Dispersive X-ray Spectroscopy), and the mesoporous structure was confirmed by TEM(Transmission Electron Microscopy). SEM(Scanning Electron Microscopy) was utilized to examine surface morphology, and it was observed that the addition of P123 affected the particle growth, resulting in the significant change of surface morphology. Methanol oxidation and CO oxidation were carried out to investigate electrocatalytic activities of synthesized samples. It was observed that the catalytic activity was strongly dependent on the film compositions. Compared with nonporous electrode prepared without P123 templating, mesoporous films prepared with P123 templating showed much higher catalytic activities and stability for both methanol oxidation and CO oxidation. These enhanced electrocatalytic activities were due to the high surface area and facilitated charge transfer of mesoporous films.
Keywords
Electrodeposition; Mesoporous; Pt-Au Alloy;
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Times Cited By KSCI : 3  (Citation Analysis)
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