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The effects of ruthenium-oxidation states on Ru dissolution in PtRu thin-film electrodes

Published online by Cambridge University Press:  23 February 2011

Yejun Park ,
Byungjoo Lee ,
Chunjoong Kim ,
Yuhong Oh ,
Seunghoon Nam  and
Byungwoo Park
Byungwoo Park*
Affiliation:
Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Korea
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effects of ruthenium (Ru)-oxidation states were investigated on Ru dissolution from PtRu thin-film electrodes, with the 200 cycles between 0.4 and 1.05 V (versus normal hydrogen electrode). The Ru-oxidation states of the PtRu thin films were systematically modified by an anodic (oxidation) treatment. The anodic-treated PtRu electrodes, whose methanol-oxidation activity was similar to untreated electrodes before the 200 cycles, showed a remarkable decrease in methanol oxidation after the cycles, because of the Ru dissolution from the PtRu surface. The results suggest that the Ru-oxide species are the origin of Ru dissolution in the PtRu alloy.

Keywords

CatalyticRuSurface chemistry
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 9 , September 2009 , pp. 2762 - 2766
Copyright
Copyright © Materials Research Society 2009

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References

1Carrette, L., Friedrich, K.A., and Stimming, U.: Fuel cells—Fundamentals and applications. Fuel Cells 1, 5 (2001)3.0.CO;2-G>CrossRefGoogle Scholar
2Reddington, E., Sapienza, A., Gurau, B., Viswanathan, R., Sarangapani, S., Smotkin, E.S., and Mallouk, T.E.: Combinatorial electrochemistry: A highly parallel, optical screening method for discovery of better electrocatalysts. Science 280, 1735 (1998)CrossRefGoogle ScholarPubMed
3Lee, B., Kim, C., Park, Y., Kim, T.G., and Park, B.: Nanostructured platinum/iron phosphate thin-film electrodes for methanol oxidation. Electrochem. Solid-State Lett. 9, E27 (2006)CrossRefGoogle Scholar
4Watanabe, M. and Motoo, S.: Electrocatalysis by ad-atoms: Part II. Enhancement of the oxidation of methanol on platinum by ruthenium ad-atoms. J. Electroanal. Chem. 60, 267 (1975)CrossRefGoogle Scholar
5Gasteiger, H., Markovic, N., Ross, P., and Cairns, E.J.: Methanol electrooxidation on well-characterized platinum-ruthenium bulk alloys. J. Phys. Chem. 97, 12020 (1993)CrossRefGoogle Scholar
6Goodenough, J., Manoharan, R., Shukla, A.K., and Rameshand, K.V.: Intra-alloy electron transfer and catalyst performance: A spectroscopic and electrochemical study. Chem. Mater. 1, 391 (1989)CrossRefGoogle Scholar
7Herrero, E., Franaszczuk, K., and Wiekowski, A.: Crystal planes of platinum: An integrated voltammetric and chronoamperometric study. J. Phys. Chem. 98, 5074 (1994)CrossRefGoogle Scholar
8Kim, C., Lee, B., Park, Y., Park, B., Lee, J., and Kim, H.: Iron-phosphate/platinum/carbon nanocomposites for enhanced electro-catalytic stability. Appl. Phys. Lett. 91, 113101 (2007)CrossRefGoogle Scholar
9Piela, P., Eickes, C., Brosha, E., Garzon, F., and Zelenay, P.: Ruthenium crossover in direct methanol fuel cell with Pt–Ru black anode. J. Electrochem. Soc. 151, A2053 (2004)CrossRefGoogle Scholar
10Holstein, W.L. and Rosenfeld, H.D.: In-situ x-ray absorption spectroscopy study of Pt and Ru chemistry during methanol electro-oxidation. J. Phys. Chem. B 109, 2176 (2005)CrossRefGoogle Scholar
11Park, Y., Lee, B., Kim, C., Kim, J., and Park, B.: The effects of iron-phosphate coating on Ru dissolution in the PtRu thin-film electrodes. J. Mater. Res. 24, 140 (2009)CrossRefGoogle Scholar
12Liu, F., Yan, Q., Zhou, W.J., Zhao, X.S., and Lee, J.Y.: High regularity porous oxophilic metal films on Pt as model bifunctional catalysts for methanol oxidation. Chem. Mater. 18, 4328 (2006)CrossRefGoogle Scholar
13Li, H., Sun, G., Gao, Y., Jiang, Q., Jia, Z., and Xin, Q.: Effect of reaction atmosphere on the electrocatalytic activities of Pt/C and PtRu/C obtained in a polyol process. J. Phys. Chem. C111, 15192 (2007)Google Scholar
14Dmowski, W., Egami, T., Swider-Lyons, K.E., Love, C.T., and Rolison, D.R.: Local atomic structure and conduction mechanism of nanocrystalline hydrous RuO2 from x-ray scattering. J. Phys. Chem. 10B 6, 12677 (2002)CrossRefGoogle Scholar
15Long, J.W., Stroud, R.M., Swider-Lyons, K.E., and Rolison, D.R.: How to make electrocatalysts more active for direct methanol oxidation-avoid PtRu bimetallic alloys. J. Phys. Chem. B 104, 9772 (2000)CrossRefGoogle Scholar
16Arico, A., Creti, P., Kim, H., Mantegna, R., Giordano, N., and Antonucci, V.: Analysis of the electrochemical characteristics of a direct methanol fuel cell based on a Pt–Ru/C anode catalyst. J. Electrochem. Soc. 143, 3950 (1996)CrossRefGoogle Scholar
17Zhang, X. and Chan, K.Y.: Water-in-oil microemulsion synthesis of platinum-ruthenium nanoparticles, their characterization and electrocatalytic properties. Chem. Mater. 15, 451 (2003)CrossRefGoogle Scholar
18Doniach, S. and Sunjic, M.: Many-electron singularity in x-ray photoemission and x-ray line spectra from metals. J. Phys. C: Solid State Phys. 3, 285 (1970)CrossRefGoogle Scholar
19Deenapanray, P.N.K., Petravic, M., Kim, K.J., Kim, B., and Li, G.: Compositional changes on GaN surfaces under low-energy ion bombardment studied by synchrotron-based spectroscopies. Appl. Phys. Lett. 83, 4948 (2003)CrossRefGoogle Scholar
20Hahn, B.P., May, R.A., and Stevenson, K.J.: Electrochemical deposition and characterization of mixed-valent rhenium oxide films prepared from a perrhenate solution. Langmuir 23, 10837 (2007)CrossRefGoogle ScholarPubMed
21Chang, K.H. and Hu, C.C.: Coalescence inhibition of hydrous RuO2 crystallites prepared by a hydrothermal method. Appl. Phys. Lett. 88, 193102 (2006)CrossRefGoogle Scholar
22Schmidt, T.J., Gasteiger, H.A., Stäb, G.D., Uraban, P.M., Kolb, D.M., and Behm, R.J.: Characterization of high surface area electrocata-lysts using a rotating disk electrode configuration. J. Electrochem. Soc. 145, 2354 (1998)CrossRefGoogle Scholar
23Lu, Q., Yang, B., Zhuang, L., and Lu, J.: Anodic activation of PtRu/C catalysts for methanol oxidation. J. Phys. Chem. B 109, 1715 (2005)CrossRefGoogle ScholarPubMed
24Erlebacher, J., Aziz, M.J., Karma, A., Dimitrov, N., and Sieradzki, K.: Evolution of nanoporosity in dealloying. Nature 410, 450 (2001)Google ScholarPubMed
25Kim, C., Park, Y., Nahm, C., and Park, B.: Formation of nanoporous Pt thin films by electrochemical dissolution. Electron. Mater. Lett. 4, 75 (2008)Google Scholar