Size-Dependent Enhancement of Electrocatalytic Performance in Relatively Defect-Free, Processed Ultrathin Platinum Nanowires

被引：233

作者：

Koenigsmann, Christopher ^{[1
]}

Zhou, Wei-ping ^{[2
]}

Adzic, Radoslav R. ^{[2
]}

Sutter, Eli ^{[3
]}

Wong, Stanislaus S. ^{[1
,4
]}

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[2] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[4] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 08期

关键词：

Platinum; nanowires; electrocatalysis; oxygen reduction reaction; OXYGEN REDUCTION REACTION; FUEL-CELL; KINETIC-PARAMETERS; SURFACES; PT(111); NANOSTRUCTURES; NANOPARTICLES; PERSPECTIVE; ADSORPTION; ELECTRODES;

D O I：

10.1021/nl100718k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the synthesis. characterization, and electrocatalytic performance of ultrathin Pt nanowires with a diameter of less than 2 nm. An acid-wash protocol was employed in order to yield highly exfoliated, crystalline nanowires with a diameter of 1.3 +/- 0.4 nm. The electrocatalytic activity of these nanowires toward the oxygen reduction reaction was studied in relation to the activity of both supported and unsupported Pt nanoparticles as well as with previously synthesized Pt nanotubes. Our ultrathin, acid-treated, unsupported nanowires displayed an electrochemical surface area activity of 1.45 mA/cm(2), which was nearly 4 times greater than that of analogous, unsupported platinum nanotubes and 7 times greater than that of commercial supported platinum nanoparticles.

引用

页码：2806 / 2811

页数：6

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