Catalytic Activity of Carbon-Supported Pt Nanoelectrocatalysts. Why Reducing the Size of Pt Nanoparticles is Not Always Beneficial

被引：74
|
作者：
Leontyev, I. N. [1 ,2 ]
Belenov, S. V. [3 ]
Guterman, V. E. [3 ]
Haghi-Ashtiani, P. [4 ]
Shaganov, A. P. [5 ]
Dkhil, B. [1 ]
机构：
[1] Ecole Cent Paris, UMR 8580, CNRS, Lab Struct Proprietes & Modelisat Solides, F-92295 Chatenay Malabry, France
[2] So Fed Univ, Fac Phys, Rostov Na Donu 344090, Russia
[3] So Fed Univ, Fac Chem, Rostov Na Donu 344090, Russia
[4] Ecole Cent Paris, Lab Mecan Sols Struct & Mat, F-92295 Chatenay Malabry, France
[5] Polytech Univ, Radiophys Sci & Engn Fac, St Petersburg 195251, Russia
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 13期
基金：
俄罗斯基础研究基金会;
关键词：
DIFFRACTION LINE-PROFILE; X-NI/C ELECTROCATALYSTS; PARTICLE-SIZE; PLATINUM NANOPARTICLES; BOROHYDRIDE SYNTHESIS; OXYGEN REDUCTION; NANOCRYSTALS; SURFACES;
D O I：
10.1021/jp1109477
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：
Carbon-supported Pt catalysts prepared by the impregnation method in water-dimethyl sulfoxide (DMSO) solutions were investigated. Using X-ray diffraction (XRD) technique for estimation of the particle size and shapes, we show that morphology of the Pt/C catalysts depends strongly on the DMSO content in the solutions. The average particles size reduces and a shape of the Pt nanocrystals changes from a truncated octahedron to a cuboctahedron and eventually to a truncated cube with increasing DMSO concentration in the reaction mixture. Antibate effects of the size and shape cause nonmonotonic dependence of the catalytic activity for the oxygen reduction reaction (ORR) with electric current maximum at an average particle size of 2.7 nm.
引用
收藏
页码：5429 / 5434
页数：6
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