Electrocatalytic performance of fuel oxidation by Pt3Ti nanoparticles

被引：159

作者：

Abe, Hideki ^{[1
,2
]}

Matsumoto, Futoshi

Alden, Laif R. ^{[3
]}

Warren, Scott C.

Abruna, Hector D.

DiSalvo, Francis J.

机构：

[1] Cornell Univ, Baker Lab, Dept Chem & Biol Chem, Ithaca, NY 14853 USA

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2008年 / 130卷 / 16期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1021/ja075061c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A Pt-based electrocatalyst for direct fuel cells, Pt3Ti,- has been prepared in the form of nanoparticles. Pt(1,5-cyclooctadiene)Cl-2 and Ti(tetrahydrofuran)(2)Cl-4 are reduced by sodium naphthalide in tetrahydrofuran to form atomically disordered Pt3Ti nanoparticles (FCC-type structure: Fm (3) over barm; a = 0.39 nm; particle size = 3 +/- 0.4 nm). These atomically disordered Pt3Ti nanoparticles are transformed to larger atomically ordered Pt3Ti nanoparticles (Cu3Au-type structure: Pm (3) over barm; a = 0.3898 nm; particle size = 37 +/- 23 nm) by annealing above 400 degrees C. Both atomically disordered and ordered Pt3Ti nanoparticles show lower onset potentials for the oxidation of formic acid and methanol than either pure Pt or Pt-Ru nanoparticles. Both atomically disordered and ordered Pt3Ti nanoparticles show a much lower affinity for GO adsorption than either pure Pt or Pt-Ru nanoparticles. Atomically ordered Pt3Ti nanoparticles show higher oxidation current densities for both formic acid and methanol than pyre Pt, Pt-Ru, or atomically disordered Pt3Ti nanoparticles. Pt3Ti nanoparticles, in particular the atomically ordered materials, have promise as anode catalysts for direct fuel cells.

引用

页码：5452 / 5458

页数：7

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