【摘 要】
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Preparation of metal and metal alloy nanoparticles is becoming more and more sophisticated [1].It requires more controls than those that can be offered by the conventional impregnation method in order
【机 构】
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Department of Chemical and Biomolecular Engineering University of Illinois at Urbana-Champaign,114 R
【出 处】
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International Conference on Nanoscience & Technology,China 2
论文部分内容阅读
Preparation of metal and metal alloy nanoparticles is becoming more and more sophisticated [1].It requires more controls than those that can be offered by the conventional impregnation method in order to produce designed structures with new properties, such as catalysis.For instance, the design of oxygen reduction electrocatalysts for fuel cell and battery applications needs to consider the uniformity in size, facet, and composition.Recently, solution-phase synthesis of Pt bimetallic nanostructures, including the gas reducing agent in liquid solution (GRAILS) method, are used for the preparation of shape-controlled Pt alloy nanoparticles [2].In this approach, carbon monoxide gas plays a pivotal role in the shape and composition control of well-defined, faceted nanocrystals of Pt, Pd and their alloy nanocrystals,including multiply twinned icosahedral nanoparticles that have been thought to be unstable for Pt until now.I will discuss the synthesis, mode of formation based on GRAILS method and the use of produced Pt alloy nanoparticles as active electrocatalysts for electrochemical energy conversion reactions.
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