Characterization of (111) surface tailored Pt nanoparticles by electrochemistry and X-ray powder diffraction

被引：17

作者：

Beyerlein, K. R. ^{[1
,2
]}

Solla-Gullon, J. ^{[3
]}

Herrero, E. ^{[3
]}

Garnier, E. ^{[3
,4
]}

Pailloux, F. ^{[5
]}

Leoni, M. ^{[2
]}

Scardi, P. ^{[2
]}

Snyder, R. L. ^{[1
]}

Aldaz, A. ^{[3
]}

Feliu, J. M. ^{[3
]}

机构：

[1] Georgia Inst Technol, Atlanta, GA 30332 USA

[2] Univ Trento, Dept Mat Engn & Ind Technol, I-38100 Trento, Italy

[3] Univ Alicante, Inst Electroquim, E-03080 Alicante, Spain

[4] CNRS, UMR 6503, Equipe Electrocatalyse, LECCO, F-86022 Poitiers, France

[5] CNRS, LMP, UMR 6630, SP2MI, F-86962 Futuroscope, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 528卷 / 01期

关键词：

Nanoparticles; Cyclic Voltammetry; X-ray diffraction; Twinning; SHAPE-DEPENDENT ELECTROCATALYSIS; PLATINUM NANOPARTICLES; SIZE; TRANSITION; ADSORPTION; PARTICLES; OXIDATION; CATALYSTS; DOMAINS;

D O I：

10.1016/j.msea.2010.05.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Platinum nanoparticles with a mean size of 8.7 nm were synthesized by a salt reduction reaction having polyhedron shapes with preferential (1 1 1) surfaces. In situ electrochemical characterization of nanoparticles was performed which confirmed the existence of mostly (1 1 1) surface sites in the sample. The effect of this surface in the electrooxidation of CO was measured. Debye Function Analysis (DFA) and Whole Powder Pattern Modelling (WPPM) of the measured X-ray diffraction pattern were carried out to obtain statistical information on the particle size and shape present in the sample. Both analyses determined that the octahedron particle shape was the most abundant which was also consistent with TEM observations. The existence of a small percentage of single twinned particles was determined by DFA, WPPM, as well as analysis of HRTEM images. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：83 / 90

页数：8

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