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The Effect of Ru on Unsupported Pt-Ru Alloys for Methanol Electro-Oxidation at Different Temperatures

Published online by Cambridge University Press:  15 February 2011

Deryn Chu ,
Charles Walker  and
Sol Gilman
Deryn Chu
Affiliation:
Electronics and Power Sources Directorate Army Research Laboratory, Fort Monmouth, New Jersey 07703-5601
Charles Walker
Affiliation:
Electronics and Power Sources Directorate Army Research Laboratory, Fort Monmouth, New Jersey 07703-5601
Sol Gilman
Affiliation:
Electronics and Power Sources Directorate Army Research Laboratory, Fort Monmouth, New Jersey 07703-5601
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Abstract

Unsupported different atomic ratios of platinum-ruthenium bulk alloys were prepared. The alloys were characterized by cyclic voltammetry, X-ray diffraction and energy dispersive X-ray spectroscopy. These alloys were also tested as anodes for methanol electro-oxidation in sulfuric acid over a range of temperatures. Ruthenium is inactive for methanol electro-oxidation at 25 °C, but becomes active at higher temperatures. When a comparison is made on the basis of “true” (hydrogen adsorption) surface area, a 30 atomic percent Ru electrocatalyst provides the highest activity for methanol electro-oxidation as measured at either 0.4 or 0.5V vs. RHE at both 25 and 60 °C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 393: Symposium W – Materials for Electrochemical Energy Storage and Conversion , 1995 , 25
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1 Parsons, R. and VanderNoot, T., J. Electroanal. Chem., 257, 9 (1988) and references therein.Google Scholar
2 Surampudi, S., Narayanan, S. R., Vamos, E., Frank, H. F., Halpert, G., LaConti, A., Kosek, J., Surya, G. K., Olah, G. A., J. Power Sources, 47, 377 (1994).Google Scholar
3 Entina, V. S. and Petry, O. A., Electrokhimiya, 4, 111 (1968).Google Scholar
4 Binder, H., Kohling, A. and Sandstede, G., In From Electrocatalysis To Fuel Cells, Sandstede, G., Editor, University of Washington Press, Seattle, WA (1972). pp. 43–58.Google Scholar
5 Watanabe, M., Uchida, M. and Motoo, S., J. Electroanal. Chem., 229, 395 (1987).Google Scholar
6 Goodenough, J. and Manoharan, R., Chem. Mater, 1, 391 (1989).Google Scholar
7 Gasteiger, H. A., Markovic, N., Ross, P. N., Jr., and J Cairns, E., J. Phys. Chem. 97, 12020 (1993); J. Electrochem. Soc., Vol.141, No. 7, 1795 (1994).Google Scholar
8 Chu, D., Annual Report to National Research Council, Washington D.C. 1993.Google Scholar
9 Bagotzky, V. S. and Vassilyev, T. B., Electrochim. Acta., 12, 1323 (1967).Google Scholar
10 Aramata, A., kodera, T. and Masuda, M., J. of Applied Electrochem. 18, 577 (1988).Google Scholar