Carbon nanotube-supported bimetallic palladium-gold electrocatalysts for electro-oxidation of formic acid

被引：26

作者：

Chen, Cheng-Han ^{[1
]}

Liou, Wei-Jen ^{[1
]}

Lin, Hong-Ming ^{[1
]}

Wu, She-Huang ^{[1
]}

Mikolajczuk, Anna ^{[2
]}

Stobinski, Leszek ^{[2
]}

Borodzinski, Andrzej ^{[2
]}

Kedzierzawski, Piotr ^{[2
]}

Kurzydlowski, Krzysztof ^{[3
]}

机构：

[1] Tatung Univ, Dept Mat Engn, Taipei 104, Taiwan

[2] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

[3] Warsaw Univ Technol, Fac Mat Sci & Engn, PL-02507 Warsaw, Poland

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2010年 / 207卷 / 05期

关键词：

catalysis; electrochemistry; hydrogenation; nanotubes; oxidation; Pd-Au; FUEL-CELLS; PD CATALYST; OXIDATION; NANOPARTICLES; PERFORMANCE; ALLOYS; ANODE; BEHAVIOR; MWCNTS;

D O I：

10.1002/pssa.200983397

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is known that palladium-based catalysts are initially very active in direct formic acid oxidation but they suffer from fast deactivation caused by a strongly adsorbed CO intermediate. Reactivation of the catalysts involving application of anodic potential may cause palladium dissolution. The aim of the present study is to increase the stability and performance of palladium-based catalysts in direct formic acid fuel cells (DFAFCs). Preparation and characterization of palladium/multiwalled carbon nanotubes (Pd/MWCNTs) and towards formic acid oxidation via different treatments are described. The catalysts were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM) and cyclic voltammetry (CV). It was shown that the Pd and Pd-Au MWCNTs supported catalysts after reduction in H-2-Ar at 200 degrees C (R200 treatment) were highly active in formic acid electro-oxidation, whereas the catalysts after heating in argon at 250 degrees C (C250 treatment) were inactive. The catalysts after hydrogen treatment have smaller metal particles and better contact with MWCNTs support. CV, simulating reactivation of the catalysts, showed that the Pd catalyst suffers from severe Pd dissolution, whereas for the Pd-Au selective leaching of Pd is considerably slower. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1160 / 1165

页数：6

共 43 条

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