The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Pt−Ru Nanoparticles Supported on Carbon Nanotubes as Methanol Fuel Cell Catalysts
Abstract
Bimetallic Pt−Ru alloy catalysts have been demonstrated to be more active than pure Pt catalysts in the electrooxidation of methanol. We report here a study on Pt−Ru nanoparticle catalysts supported on sonochemically functionalized carbon nanotubes. The catalysts were prepared by directly reducing the corresponding salts, K 2 PtCl 4 and K 2 RuCl 5, in an ethylene glycol aqueous solution containing dispersed carbon nanotubes. Three catalysts of different Pt to Ru atomic ratios, namely, Pt 53 Ru 47, Pt 69 Ru 31, and Pt 77 Ru 23, were prepared for investigation of the compositional effects. It was shown that highly dispersed bimetallic Pt−Ru alloy nanoparticles with no agglomeration can be synthesized on the carbon nanotubes with average particle sizes of less than 3.0 nm in diameter. The Pt−Ru nanoparticles are uniform and cover only the outside of the carbon nanotubes. It was found that the polyol process produced alloy compositions that are not consistent with the metal ratios in the precursors. It was also found that the lattice spacings of these catalysts are different due to the different compositions of the catalysts. Cyclic voltammetry showed that the catalysts were electrocatalytically active in the electrooxidation of methanol. Among the three catalysts, the Pt 53 Ru 47 catalyst produced the best performance. This catalyst was found to be the most stable, while the other two deactivated faster in the oxidation of methanol. All three Pt−Ru catalysts have higher electrocatalytic activities than a commercial catalyst of Pt 50 Ru 50 supported on carbon black. However, the Pt 69 Ru 31 and Pt 77 Ru 23 catalysts showed poorer stability that can be justified by the bifunctional mechanism of bimetallic Pt−Ru alloys.
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Cites
Characterization of High‐Surface‐Area Electrocatalysts Using a Rotating Disk Electrode Configuration
Schmidt, T. J., Gasteiger, H. A., Stäb, G. D., Urban, P. M., Kolb, D. M., & Behm, R. J. (1998) · Journal of The Electrochemical Society · doi:10.1149/1.1838642 · Cited by 1,131
Cited by
Park, K. C., Jang, I. Y., Wongwiriyapan, W., Morimoto, S., Kim, Y. J., Jung, Y. C., Toya, T., & Endo, M. (2010) · Journal of Materials Chemistry · doi:10.1039/b923153f · Cited by 66
Lin, C., Huang, Z., Zhang, Z., Zeng, T., Chen, R., Tan, Y., Wu, W., Mu, S., & Cheng, N. (2020) · ACS Sustainable Chemistry & Engineering · doi:10.1021/acssuschemeng.0c06547 · Cited by 41
Carbon nanotubes as catalyst support in a glucose microfluidic fuel cell in basic media
Guerra-Balcázar, M., Cuevas-Muñiz, F. M., Castaneda, F., Ortega, R., Álvarez-Contreras, L., Ledesma-García, J., & Arriaga, L. G. (2011) · Electrochimica Acta · doi:10.1016/j.electacta.2011.07.099 · Cited by 26
Metadata
- Authors
- Li, L., & Xing, Y.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-01-24
- Volume
- 111
- Issue
- 6
- Pages
- 2803-2808
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2051489845
- Cited by
- 206
- References
- 1
- FWCI
- 9.93
- Type
- journal article
- Language
- en
- Open access
- closed
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