Effect of Thermal Treatment on the Atomic Structure and Electrochemical Characteristics of Bimetallic PtCu Core-Shell Nanoparticles in PtCu/C Electrocatalysts

被引：19

作者：

Pryadchenko, Vasiliy V. ^{[1
,2
]}

Belenov, Sergey V. ^{[1
,2
]}

Shemet, Darya B. ^{[1
,2
]}

Srabionyan, Vasiliy V. ^{[1
,2
]}

Avakyan, Leon A. ^{[1
,2
]}

Volochaev, Vadim A. ^{[1
,2
]}

Mikheykin, Alexey S. ^{[1
,2
,3
]}

Bdoyan, Karina E. ^{[1
,2
]}

Zizak, Ivo ^{[4
]}

Guterman, Vladimir E. ^{[1
,2
]}

Bugaev, Lusegen A. ^{[1
,2
]}

机构：

[1] Southern Fed Univ, Phys Fac, B Sadovaya Str 105-42, Rostov Na Donu 344006, Russia

[2] Southern Fed Univ, Chem Fac, B Sadovaya Str 105-42, Rostov Na Donu 344006, Russia

[3] Southern Sci Ctr Russian Acad Sci, 5 Zorge St, Rostov Na Donu 344090, Russia

[4] Helmholtz Zentrum Berlin, Inst Nanometre Opt & Technol, Albert Einstein Str 15, D-12489 Berlin, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 30期

基金：

俄罗斯科学基金会;

关键词：

OXYGEN REDUCTION REACTION; RAY-ABSORPTION SPECTROSCOPY; ELECTROLYTE FUEL-CELLS; CATALYTIC-ACTIVITY; ALLOY CATALYSTS; PT/C ELECTROCATALYSTS; MOLECULAR-DYNAMICS; HEAT-TREATMENT; CU; SURFACE;

D O I：

10.1021/acs.jpcc.8b03696

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：

Supported PtCu/C electrocatalysts containing core-shell bimetallic PtCu nanoparticles were synthesized by sequential chemical reduction of Cu2+ and Pt(IV) in a carbon suspension, prepared on the basis of ethylene glycol-water solvent, and then treated at different temperatures in the range from 250 to 350 degrees C. The structural characterization of "as-prepared" PtCu nanoparticles and of those obtained after the thermal treatments was performed by transmission electron microscopy, X-ray diffraction, and Pt L-3- and Cu K-edge extended X-ray absorption fine structure spectroscopy. The atomic cluster models of PtCu nanoparticles before and after the thermal treatment, reflecting the character of the components' distribution, were generated. The electrochemical performance of the obtained PtCu/C electrocatalysts in oxygen reduction reaction was studied by cycling and linear voltammetry.

引用

页码：17199 / 17210

页数：12

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