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

被引：76

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

页码：5429 / 5434

页数：6

共 33 条

[1]

[Anonymous], RUSS CHEM REV

[2]

BEARD BC, 1990, J ELECTROCHEM SOC, V137, P336

[3]

DEKKER M, 2003, CATALYSIS ELECTROCAT

[4] Are vicinal metal surfaces stable? [J].

Frenken, JWM ;

Stoltze, P .

PHYSICAL REVIEW LETTERS, 1999, 82 (17) :3500-3503

[5] SIZE EFFECTS OF DISLOCATION STABILITY IN NANOCRYSTALS [J].

GRYAZNOV, VG ;

POLONSKY, IA ;

ROMANOV, AE ;

TRUSOV, LI .

PHYSICAL REVIEW B, 1991, 44 (01) :42-46

[6]

GRYAZNOV VG, 1989, TECH PHYS LETT, V15, P39

[7] Borohydride synthesis of the Ptx-Ni/C electrocatalysts and investigation of their activity in the oxygen electroreduction reaction [J].

Guterman, V. E. ;

Pustovaya, L. E. ;

Guterman, A. V. ;

Vysochina, L. L. .

RUSSIAN JOURNAL OF ELECTROCHEMISTRY, 2007, 43 (09) :1091-1096

[8] Influence of water-organic solvent composition on composition and structure of Pt/C and Pt x Ni/C electrocatalysts in borohydride synthesis [J].

Guterman, V. E. ;

Belenov, S. V. ;

Dymnikova, O. V. ;

Lastovina, T. A. ;

Konstantinova, Ya. B. ;

Prutsakova, N. V. .

INORGANIC MATERIALS, 2009, 45 (05) :498-505

[9] Two-dimensional detector software: From real detector to idealised image or two-theta scan [J].

Hammersley, AP ;

Svensson, SO ;

Hanfland, M ;

Fitch, AN ;

Hausermann, D .

HIGH PRESSURE RESEARCH, 1996, 14 (4-6) :235-248

[10]

Holland T., 1997, Journal of Applied Crystallography, V1, P84, DOI [10.1107/S0021889896011673, DOI 10.1107/S0021889896011673, /10.1107/s0021889896011673]

← 1 2 3 4 →