Electro-oxidation of ethanol and bioethanol in direct alcohol fuel cells by microparticulated amorphous Ni59Nb40Pt0.6Cu0.4 and Ni59Nb40Pt0.6Cu0.2Sn0.2 alloys

被引：6

作者：

Barroso, Javier ^{[1
]}

Pierna, Angel R. ^{[1
]}

Blanco, Tamara C. ^{[1
]}

del Val, Juan J. ^{[2
]}

机构：

[1] Univ Basque Country, Dept Chem Engn & Environm, San Sebastian 20018, Spain

[2] Univ Basque Country, Fac Chem, Dept Mat Phys, San Sebastian 20018, Spain

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2011年 / 208卷 / 10期

关键词：

amorphous alloys; bioethanol; DAFCs; ethanol; METHANOL; ELECTRODES; OXIDATION; MECHANISM;

D O I：

10.1002/pssa.201000730

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work has focused on the development of metallic amorphous microparticulated alloys of composition Ni59Nb40Pt0.6Cu0.4 and Ni59Nb40Pt0.6Cu0.2Sn0.2, obtained by mechanical alloying (MA), for use as anodes in direct alcohol fuel cells (DAFCs). The addition of copper modifies the electronic properties of platinum due to its special electronic configuration (3d(10)4s(1)), demonstrating a better performance for ethanol/bioethanol electro-oxidation. Ni59Nb40Pt0.6Cu0.4 alloy provides higher current densities than Ni59Nb40Pt0.6Cu0.2Sn0.2 alloy. In spite of tin significantly improving the tolerance to different adsorbed species such as CO, its presence does not improve the electro-oxidation reaction due to limit the distribution of platinum atoms by the ligand effect, avoiding the final oxidation to CO2. In both alloys higher current densities were obtained for bioethanol electro-oxidation than ethanol, due mainly to the presence of acetaldehyde, formic acid and another organic compounds (ppb), which may contribute to improvement of catalytic results. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2309 / 2312

页数：4

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