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

页码：8097 / 8101

页数：5

共 38 条

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