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首页> 外文期刊>Inorganic Chemistry Frontiers >Facile synthesis of clean PtAg dendritic nanostructures with enhanced electrochemical properties
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Facile synthesis of clean PtAg dendritic nanostructures with enhanced electrochemical properties

机译:具有增强电化学性质的清洁PTAG树突纳米结构的容易合成

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摘要

Recently, great efforts have been devoted to improving the catalytic activity and durability of Pt based catalysts for proton exchange membrane fuel cells. Here, surfactant-free PtAg fractal dendritic nanocrystals (NCs) with high surface area were prepared via a facile one-pot reaction. The control synthetic experiments proved that the formation of PtAg fractal dendritic NCs resulted from a kinetics-controlled growth, i.e. the "diffusion limited aggregation" mechanism. Due to their unique structural advantage and clean surface, the as-prepared PtAg fractal dendritic NCs exhibited superior electrochemical catalytic activities and structural stabilities compared with commercial Pt black and Pt/C towards methanol electro-oxidation and oxygen reduction reaction in acidic media. The design strategy presented here may be useful in fabricating other highly active and stable Pt-M catalysts for fuel cells.
机译:最近,已经致力于提高PT基催化剂的催化活性和耐久性的质子交换膜燃料电池。 这里,通过容易的单罐反应制备具有高表面积的无表面活性剂的PTAG分形树枝状纳米晶纳米晶(NC)。 控制合成实验证明,形成PTAG分形树枝状NCS由动力学控制的生长导致,即“扩散限制聚集”机制。 由于其独特的结构优势和清洁表面,与商业Pt黑色和Pt / C相比,如制备的PTAG分形树枝状NCs表现出优异的电化学催化活性和结构稳定性,与酸性介质中的甲醇电氧化和氧还原反应相比。 这里呈现的设计策略可用于制造用于燃料电池的其他高活性和稳定的Pt-M催化剂。

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