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Electrooxidation of H-2, CO and H-2/CO mixtures on a well-characterized Pt-Re bulk alloy electrode and comparison with other Pt binary alloys
dc.creator | Grgur, Branimir | |
dc.creator | Marković, NM | |
dc.creator | Ross, PN | |
dc.date.accessioned | 2021-03-10T09:46:45Z | |
dc.date.available | 2021-03-10T09:46:45Z | |
dc.date.issued | 1998 | |
dc.identifier.issn | 0013-4686 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/218 | |
dc.description.abstract | We report new results for the electrooxidation of Hz, CO and H-2/CO mixtures on a Pt75Re25 bulk alloy using surface preparation in a UHV chamber and characterization by X-ray photoelectron spectroscopy (XPS). Sputter-cleaned but not-annealed surfaces having the bulk composition were used. This alloy surface has unique properties for CO electrooxidation: finite current densities below 0.2 V (rhe), a positive reaction order in CO partial pressure of +0.5, but an unusually high slope in the log i vs E curve, about 220;mV per decade. Anodic stripping of the irreversibly adsorbed CO on this surface also occurs at an unusually low potential, initiating at about 0.15 V, but only about 1/3 of the total amount of CO on the surface is oxidized at 0.15-0.4 V, the remainder being oxidized at 0.6-0.8 V. The polarization curves for the oxidation of H-2/CO mixtures containing 0.1-2% CO are, however, very Pt-like. It appears that the low-potential oxidation of both dissolved CO and adsorbed CO on this surface occurs exclusively at Re sites, so that with the H-2/CO mixture the Pt sites remain fully covered (and thus deactivated) by COads. | en |
dc.publisher | Pergamon-Elsevier Science Ltd, Oxford | |
dc.rights | restrictedAccess | |
dc.source | Electrochimica Acta | |
dc.subject | electrocatalysis | en |
dc.subject | CO-tolerant anodes | en |
dc.subject | Pt-Re alloy | en |
dc.title | Electrooxidation of H-2, CO and H-2/CO mixtures on a well-characterized Pt-Re bulk alloy electrode and comparison with other Pt binary alloys | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 3635 | |
dc.citation.issue | 24 | |
dc.citation.other | 43(24): 3631-3635 | |
dc.citation.rank | M22 | |
dc.citation.spage | 3631 | |
dc.citation.volume | 43 | |
dc.identifier.doi | 10.1016/S0013-4686(98)00120-0 | |
dc.identifier.scopus | 2-s2.0-0032310602 | |
dc.identifier.wos | 000075658900002 | |
dc.type.version | publishedVersion |