Abstract
In this work, PtRu/C-Sb materials prepared by adding a Sb salt to the ink of commercial PtRu/C were studied as catalysts for ethanol oxidation. The prepared trimetallic catalysts showed enhanced properties for ethanol oxidation through a wide range of surface coverages. However, coverage higher than 0.7 of Sb on PtRu/C causes the decrease of the catalytic activity suggesting that specific sites composed of 3 metals are necessary to achieve the highest performance. In situ Fourier Transform Infrared Spectroscopy experiments were also performed to compare the reaction products of the bimetallic and trimetallic catalysts. The catalysts were also tested under fuel cell conditions. Also in this case, higher power densities, higher open-circuit voltages and better stability than the bimetallic substrate were found. With this catalyst preparation method, the catalysts showed 2 times higher current densities than for the PtRu catalysts and 6 times better than for pure Pt anodes.
| Original language | English |
|---|---|
| Pages (from-to) | 69-77 |
| Number of pages | 9 |
| Journal | Journal of Catalysis |
| Volume | 329 |
| DOIs | |
| Publication status | Published - 20 May 2015 |
| MoE publication type | A1 Journal article-refereed |
Funding
The financial support from Aalto University is acknowledged. This work made use of the Aalto University Nanomicroscopy Center (Aalto-NMC) premises. J.M.F. and R.M.A.A. would like to thank MICINN through Project CTQ2013-44083-P.
Keywords
- Antimony
- Direct ethanol fuel cells
- Irreversible adsorption
- PtRu catalysts
