Improvement of Cathode Performance on Pt-CeOx by Optimization of Electrochemical Pretreatment Condition for PEFC Application

被引：34

作者：

Fugane, Keisuke ^{[1
,2
]}

Mori, Toshiyuki ^{[1
,2
]}

Ou, Ding Rong ^{[3
]}

Yan, Pengfei ^{[2
]}

Ye, Fei ^{[4
]}

Yoshikawa, Hideki ^{[5
]}

Drennan, John ^{[6
]}

机构：

[1] Hokkaido Univ, Grad Sch Chem Sci & Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

[2] Natl Inst Mat Sci, Hetero Interface Design Grp, Global Res Ctr Environm & Energy Based Nanomat Sc, Tsukuba, Ibaraki 3050044, Japan

[3] Chinese Acad Sci, Dalian Inst Chem Phys, Lab Fuel Cells, Dalian 116023, Liaoning, Peoples R China

[4] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Liaoning, Peoples R China

[5] Natl Inst Mat Sci, SPring 8, NIMS Beamline Stn, Mikazuki, Hyogo 6795148, Japan

[6] Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia

来源：

LANGMUIR | 2012年 / 28卷 / 48期

关键词：

OXYGEN REDUCTION REACTION; CARBON ALLOY CATALYSTS; ELECTROCATALYSTS;

D O I：

10.1021/la302912r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pt-CeOx/C electrocatalysts for the improvement of oxygen reduction reaction (ORR) activity on cathode were prepared by a combined process of precipitation and co-impregnation methods. The Pt-CeOx/C electrocatalysts pretreated by the optimized electrochemical conditioning process showed high ORR activity as compared with homemade Pt/C electrocatalyst. Also, it showed high stability in the cyclic voltammetry (CV) test up to 1000 cycles into 0.5 M H2SO4 aqueous solution. On the basis of the data of cyclic voltammogram of 30 cyclic sweeps, X-ray photoelectron spectroscopy, electron energy loss spectroscopy, high resolution transmission electron microscope image, and selected area electron diffraction analysis, it is concluded that the Pt-CeOx heterointerface involving the defect cluster formed by using optimized electrochemical pretreatment conditions on Pt in Pt-CeOx/C electro-catalyst contributes to the promotion of ORR activity and retention of its stability in long CV tests up to 1000 cycles.

引用

页码：16692 / 16700

页数：9

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