Physical and morphological characteristics and electrochemical behaviour in PEM fuel cells of PtRu/C catalysts

被引：146
作者：
Antolini, E
Giorgi, L
Cardellini, F
Passalacqua, E
机构：
[1] ENEA, CR Casaccia, Erg Tea Echi, I-00060 Santa Maria Galeria, Rome, Italy
[2] ENEA, CR Casaccia, Inn Numa Matav, I-00060 Santa Maria Galeria, Rome, Italy
[3] CNR, Inst Transformat & Storage Energy, I-98126 Messina, Italy
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2001年 / 5卷 / 02期
关键词：
platinum; ruthenium; carbon-supported catalysts; polymer electrolyte fuel cell; carbon monoxide oxidation;
D O I：
10.1007/s100080000116
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Platinum-ruthenium catalysts supported on carbon (PtRu/C) have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), specific surface area analysis (BET), X-ray photoelectron spectroscopy (XPS) and in proton exchange membrane (PEM) fuel cell tests. The results indicate the presence of strong metal-carbon interactions, which hinder the formation of a single-phase face-centered cubic (fcc) PtRu alloy. The particle size of the PtRu/C catalysts was smaller than both carbon-supported platinum (Pt/C) and ruthenium (Ru/C) catalysts. In the bimetallic electrocatalysts the intercrystallite distance decreased with respect to pure Pt and Ru metals. PEM fuel cell tests in H-2/air operation mode revealed a decrease of performance with increasing carbon content of the catalyst, at a fixed Pt loading. In H-2 + 100 ppm CO/air operation mode the maximum performance of the PEM fuel cell was attained at 0.63 atomic fraction Ru.
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收藏
页码：131 / 140
页数：10
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