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 (fee) 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 H2/air operation mode revealed a decrease of performance with increasing carbon content of the catalyst, at a fixed Pt loading. In H2+ 100 ppm CO/air operation mode the maximum performance of the PEM fuel cell was attained at 0.63 atomic fraction Ru. © Springer-Verlag 2001.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering
Antolini, E., Giorgi, L., Cardellini, F., & Passalacqua, E. (2001). Physical and morphological characteristics and electrochemical behaviour in PEM fuel cells of PtRu/C catalysts. Journal of Solid State Electrochemistry, 5(2), 131 - 140. https://doi.org/10.1007/s100080000116