A Pt-Ru/graphitic carbon nanofiber nanocomposite exhibiting high relative performance as a direct-methanol fuel cell anode catalyst

被引：337
|
作者：
Steigerwalt, ES
Deluga, GA
Cliffel, DE
Lukehart, CM
机构：
[1] Vanderbilt Univ, Dept Chem, Nashville, TN 37235 USA
[2] Univ Minnesota, Corros Res Ctr, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 34期
关键词：
D O I：
10.1021/jp011633i
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Multistep deposition and reactive decomposition of a precursor molecule containing one Pt and one Ru atom on herringbone graphitic carbon nanofibers (GCNFs) affords a Pt-Ru/GCNF nanocomposite containing Pt-Ru alloy nanoclusters widely dispersed on the GCNF support. The nanocomposite has a total metal content of 42 wt % with a bulk Pt/Ru atomic ratio of ca. 1:1, and metal alloy nanoclusters having average particle sizes of 6 nm as calculated from XRD peak widths or 7 nm as measured directly from TEM images. XRD and electrochemical analysis of the nanocomposite as-prepared and stored under ambient conditions reveals the presence of small amounts of Ru metal and oxidized metal species. Comparative testing of this nanocomposite and an unsupported Pt-Ru colloid of similar surface area and catalyst particle size as anode catalysts in a working direct-methanol fuel cell (DMFC) reveals a 50% increase in performance for the Pt-Ru/GCNF nanocomposite. More detailed study of the catalytic performance of metal alloy/GCNF nanocomposites as DMFC anode catalysts appears to be warranted.
引用
收藏
页码：8097 / 8101
页数：5
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