Bimetallic PtCu core-shell nanoparticles in PtCu/C electrocatalysts: Structural and electrochemical characterization

被引：39
|
作者：
Pryadchenko, Vasiliy V. [1 ,2 ]
Srabionyan, Vasiliy V. [1 ,2 ]
Kurzin, Alexander A. [1 ,2 ]
Bulat, Natalia V. [1 ,2 ]
Shemet, Darya B. [1 ,2 ]
Avakyan, Leon A. [1 ,2 ]
Belenov, Sergey V. [1 ,2 ]
Volochaev, Vadim A. [1 ,2 ]
Zizak, Ivo [3 ]
Guterman, Vladimir E. [1 ,2 ]
Bugaev, Lusegen A. [1 ,2 ]
机构：
[1] Southern Fed Univ, Fac Phys, B Sadovaya Str 105-42, Rostov Na Donu 344006, Russia
[2] Southern Fed Univ, Fac Chem, B Sadovaya Str 105-42, Rostov Na Donu 344006, Russia
[3] Helmholtz Zentrum Berlin, Inst Nanometre Opt & Technol, Albert Einstein Str 15, D-12489 Berlin, Germany
来源：
APPLIED CATALYSIS A-GENERAL | 2016年 / 525卷
关键词：
Voltammetric cycling; Electrochemical performance; Atomic structure; TEM; XRD; EXAFS; Cluster modeling; Oxygen reduction reaction; OXYGEN REDUCTION REACTION; ALLOY CATALYSTS; ATOMIC-STRUCTURE; FUEL-CELLS; NI; CU; PD; SPECTROSCOPY; AG; DESIGN;
D O I：
10.1016/j.apcata.2016.08.008
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：
Composite metal-carbon electrocatalysts PtCu/C containing core-shell bimetallic PtCu nanoparticles were synthesized by sequential chemical reduction of Cu (II) and Pt (IV) in carbon suspension, prepared on the basis of ethylene glycol-water solvent. The characterization of "as prepared" and obtained after the acid treatment PtCu nanoparticles was performed by TEM, XRD, Pt L-3- and Cu K-edge extended X-ray absorption fine structures (EXAFS.). The technique and computational code were proposed for visualization of components distribution over the volume of cluster, which represents the mean bimetallic nanoparticle, according to the values of structural parameters derived from EXAFS. By this technique, the cluster models of PtCu nanoparticles before and after acid treatment, reflecting the character of components' distribution, were generated. The study of electrochemical performances of the obtained PtCu/C electrocatalyst revealed the similar oxygen reduction reaction (ORR) activity and increased durability compared to commercial Pt/C electrocatalyst E-TEK 20. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：226 / 236
页数：11
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