http://www.cnr.it/ontology/cnr/individuo/prodotto/ID181654

Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel-Zinc Materials (Articolo in rivista)

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Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel-Zinc Materials (Articolo in rivista) (literal)

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Bambagioni, V. ; Bianchini, C. ; Filippi, J. ; Oberhauser, W. ; Marchionni, A. ; Vizza, F. ; Psaro, R. ; Sordelli, L. ; Foresti, M. L. ; Innocenti, M. (2009)
Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel-Zinc Materials
in ChemSusChem (Weinh., Print); Wiley-VCH Verlag Gmbh, Weinheim (Germania)
(literal)

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Bambagioni, V. ; Bianchini, C. ; Filippi, J. ; Oberhauser, W. ; Marchionni, A. ; Vizza, F. ; Psaro, R. ; Sordelli, L. ; Foresti, M. L. ; Innocenti, M. (literal)

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ICCOM CNR, I-50019 Sesto Fiorentino, Italy ISTM CNR, I-20133 Milan, Italy Univ Florence, Dipartimento Chim, I-50019 Sesto Fiorentino, Italy (literal)

Titolo

Ethanol Oxidation on Electrocatalysts Obtained by Spontaneous Deposition of Palladium onto Nickel-Zinc Materials (literal)

Abstract

Ni-Zn and Ni-Zn-P alloys supported on Vulcan XC-72 are effective materials for the spontaneous deposition of palladium through redox transmetalation with Pd(IV) salts. The materials obtained, Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C, have been characterized by a variety of techniques. The analytical and spectroscopic data show that the surface of Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C contain very small, highly dispersed, and highly crystalline palladium clusters as well as single palladium sites, likely stabilized by interaction with oxygen atoms from Ni-O moieties. As a reference material, a nanostructured Pd/C material was prepared by reduction of an aqueous solution of PdCl(2)/HCl with ethylene glycol in the presence of Vulcan XC-72. In Pd/C, the Pd particles are larger, less dispersed, and much less crystalline. Glossy carbon electrodes coated with the Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C materials, containing very low Pd loadings (22-25 mu g cm(2)), were studied for the oxidation of ethanol in alkaline media in half cells and provided excellent results in terms of both specific current (as high as 3600 A g(Pd)(-1) at room temperature) and onset potential (as low as -0.6 V vs Ag/AgCl/KCl(sat)). (literal)

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