Simple and low-cost preparation method for highly dispersed PtRu/C catalysts
Simple and low-cost preparation method for highly dispersed PtRu/C catalysts
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DOI：
10.1021/cm034306r
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发表时间：
2003-09
影响因子：
8.6
通讯作者：
Bo Yang;Qingye Lu;Yang Wang;Zhuang Lin;Juntao Lu;Pei-Pei Liu-Pei;Jianbo Wang;Renhui Wang
中科院分区：
文献类型：
--
作者：
Bo Yang;Qingye Lu;Yang Wang;Zhuang Lin;Juntao Lu;Pei-Pei Liu-Pei;Jianbo Wang;Renhui Wang
采用浸渍法制备了高分散的PtRu催化剂。正如HRTEM图像清楚地显示的，即使在高金属负载量（高达40wt%Pt +20wt%Ru）下，平均粒径为1.5nm，具有窄分布（± 0.5nm）。通过EDAX、XRD、XPS和TGA/DTA分析，推测PtRu催化剂的结构由PtRu合金和以水合氧化钌RuOxHy为主的非晶态钌化合物组成。由此制备的PtRu催化剂表现出优异的甲醇氧化性能。
A low-cost impregnation method was developed to prepare PtRu catalysts highly dispersed on carbon support. As clearly revealed by the HRTEM image, even with high metal loadings (up to 40 wt % Pt + 20 wt % Ru) the average particle diameter was 1.5 nm with a narrow distribution (′0.5 nm). Based on EDAX, XRD, XPS, and TGA/DTA analyses, the structure of the PtRu catalyst was deduced to be composed of PtRu alloy and amorphous ruthenium compounds, predominantly hydrous ruthenium oxide, RuO x H y . The PtRu catalyst thus-prepared exhibited excellent performance for methanol oxidation.