Pt overgrowth on carbon supported PdFe seeds in the preparation of core-shell electrocatalysts for the oxygen reduction reaction

被引：78

作者：

Wang, Wei ^{[1
]}

Wang, Rongfang ^{[1
]}

Ji, Shan ^{[2
]}

Feng, Hanqing ^{[3
]}

Wang, Hui ^{[1
]}

Lei, Ziqiang ^{[1
]}

机构：

[1] NW Normal Univ, Coll Chem & Chem Engn, Key Lab Gansu Polymer Mat, Minist Educ China,Key Lab Ecoenvironm Related Pol, Lanzhou 730070, Peoples R China

[2] Univ Western Cape, S African Inst Adv Mat Chem, Cape Town, South Africa

[3] NW Normal Univ, Coll Life Sci, Lanzhou 730070, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 11期

关键词：

Electrocatalysts; Core-shell structure; Oxygen reduction reaction; Fuel cells; FACILE SYNTHESIS; NANOPARTICLE ELECTROCATALYSTS; PLATINUM MONOLAYER; PT-CO; CATALYSTS; FE; METHANOL; NI; ELECTROREDUCTION; NANOCRYSTALS;

D O I：

10.1016/j.jpowsour.2009.12.015

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：

In this study, a novel core-shell structured Pd3Fe@Pt/C electrocatalyst, which is based on Pt deposited onto carbon supported Pd3Fe nanoparticles, is prepared for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). The carbon supported Pd3Fe nanoparticles act as seeds to guide the growth of Pt. The formation of the core-shell structured Pd3Fe@)Pt/C is confirmed by transmission electron microscopy (TEM), X-ray diffraction (XRD) and electrochemical characterization. The higher surface area of the synthesize catalyst suggests that the utilization of Pt in the Pd3Fe@Pt/C catalyst is higher than that in Pt/C. Furthermore, better electrocatalytic performance than that of Pt/C and Pd3Fe/C catalyst is observed in the ORR which follows a four-electron path. Consequently, the results indicate that the Pd3Fe@Pt/C catalyst could be used as a more economically viable alternative for the ORR of PEMFCs. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3498 / 3503

页数：6

共 44 条

[1] Synthesis and characterization of osmium carbonyl cluster compounds with molecular oxygen electroreduction capacity [J].