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Oxygen reduction at Pt and Pt70Ni30 in H2SO4/CH3OH solution
Abstract
The electrochemical oxygen reduction reaction (ORR) was studied at Pt and Pt alloyed with 30 atom% Ni in 1 M H2SO4 and in 1 M H2SO4/0.5 M CH3OH by means of rotating disc electrode. In pure sulphuric acid, the overpotential of ORR at 1 mA cm−2 is about 80 mV lower at Pt70Ni30 than at pure Pt. It was found that in methanol containing electrolyte solution the onset potential for oxygen reduction at PtNi is shifted to more positive potentials and the alloy catalyst has an 11 times higher limiting current density for oxygen reduction than Pt. Thus, PtNi as cathode catalyst should have a higher methanol tolerance for fuel cell applications. On the other hand, no significant differences in the methanol oxidation on both electrodes was found using cycling voltammetry, especially regarding the onset potential for methanol oxidation. During all the measurements no significant electrochemical activity loss was observed at Pt0.7Ni0.3. Ex-situ XPS investigations before and after the electrochemical experiments have revealed Pt enrichment in the first surface layers of the PtNi.
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Cited by
Shinagawa, T., Garcia-Esparza, A. T., & Takanabe, K. (2015) · Scientific Reports · doi:10.1038/srep13801 · Cited by 3,287
Yang, H., Vogel, W., Lamy, C., & Alonso-Vante, N. (2004) · The Journal of Physical Chemistry B · doi:10.1021/jp049034+ · Cited by 323
Deivaraj, T. C., & Lee, J. Y. (2005) · Journal of Power Sources · doi:10.1016/j.jpowsour.2004.10.010 · Cited by 174
Xu, J. B., Zhao, T. S., Yang, W. W., & Shen, S. Y. (2010) · International Journal of Hydrogen Energy · doi:10.1016/j.ijhydene.2010.05.008 · Cited by 89
Influence of Oxide on the Oxygen Reduction Reaction of Carbon-Supported Pt−Ni Alloy Nanoparticles
Jeon, T.-Y., Yoo, S. J., Cho, Y.-H., Lee, K.-S., Kang, S. H., & Sung, Y.-E. (2009) · The Journal of Physical Chemistry C · doi:10.1021/jp9076273 · Cited by 74
Metadata
- Authors
- Drillet, J.-F., Ee, A., Friedemann, J., Kötz, R., Schnyder, B., & Schmidt, V. M.
- Venue
- Electrochimica Acta
- Publisher
- Elsevier BV
- Published
- 2002-05
- Volume
- 47
- Issue
- 12
- Pages
- 1983-1988
- ISSN
- 0013-4686 (ISSN-L)
- OpenAlex
- W1976655747
- Cited by
- 158
- References
- 0
- FWCI
- 10.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- Drillet, J.-F., Ee, A., Friedemann, J., Kötz, R., Schnyder, B., & Schmidt, V. M. (2002). Oxygen reduction at Pt and Pt70Ni30 in H2SO4/CH3OH solution. Electrochimica Acta. https://doi.org/10.1016/s0013-4686(02)00027-0
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