Probing metal substrate interaction of Pt nanoparticles: Structural XRD analysis and oxygen reduction reaction

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题名:	Probing metal substrate interaction of Pt nanoparticles: Structural XRD analysis and oxygen reduction reaction
作者:	Vogel,W;Timperman,L;Alonso-Vante,N
贡献者:	化學學系
关键词:	PEM FUEL-CELL;NITROGEN-CONTAINING CARBON;X-RAY-DIFFRACTION;CATALYST SUPPORT;ELECTROCHEMICAL CHARACTERISTICS;PLATINUM NANOPARTICLES;MESOPOROUS CARBON;ELECTROCATALYSTS;ELECTRODES;SURFACE
日期:	2010
上传时间:	2012-03-27 18:09:57 (UTC+8)
出版者:	國立中央大學
摘要:	Platinum nanoparticles were selectively deposited on titania via a facile photochemical method. The anatase-type TiO(2) nanostructure, prepared by sot-gel, is in intimate contact with the carbon (Vulcan XC-72) used as supporting material. The structural studies via XRD in the as prepared and heat-treated samples were evaluated and compared to the substrate without oxide. The lattice constant of platinum was found 0.6% less than the value in the bulk. This observation is accompanied by high internal strains, which are not present on the Pt/C system. A healing of such defects is achieved by the thermal treatment. The consequence of such observations is discussed in terms of a strong-metal nanoparticle oxide interaction, which is favorable for electrocatalysis. These studies suggest that Pt-TiO(2)-C might serve as an element of response to lower the amount of utilized platinum in low temperature H(2)/O(2) fuel cells cathodes. (C) 2010 Elsevier B.V. All rights reserved.
關聯:	APPLIED CATALYSIS A-GENERAL
显示于类别:	[化學學系] 期刊論文

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