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Electrocatalysis oxidation

Adzic RR, Tripkovic AV, Markovic NM. 1983. Structural effects in electrocatalysis oxidation of formic acid and oxygen reduction on single-crystal electrodes and the effects of foreign metal adatoms. J Electroanal Chem 150 79-88. [Pg.552]

Morin MC, Lamy C, Leger JM, Vasquez JL, Aldaz A (1990) Structural effects in electrocatalysis - oxidation of ethanol on platinum single-crystal electrodes - effect of pH. J Electroanal Chem 283 287-302... [Pg.97]

Anodic Reactions in Electrocatalysis -Oxidation of Carbon Monoxide... [Pg.93]

Anodic Reactions in Electrocatalysis -Oxidation of Carbon Monoxide, Fig. 1 Plot of a-top C-O band wavenumber versus the CO fractional surface coverage for (a) nanometer-sized Pt particles supported on pyrolytic carbon of Sibunit family and (b) Pt(557) = Pt [6(lll)x(100)] single crystal (Reproduced from Refs. [4, 17] with permission of the American Chemical Society)... [Pg.95]

Oxidation can also occur at the central metal atom of the phthalocyanine system (2). Mn phthalocyanine, for example, can be produced ia these different oxidation states, depending on the solvent (2,31,32). The carbon atom of the ring system and the central metal atom can be reduced (33), some reversibly, eg, ia vattiag (34—41). Phthalocyanine compounds exhibit favorable catalytic properties which makes them interesting for appHcations ia dehydrogenation, oxidation, electrocatalysis, gas-phase reactions, and fuel cells (qv) (1,2,42—49). [Pg.504]

Electrocatalysis Again by definition, an electrocatalyst is a solid, in fact an electrode, which can accelerate a process involving a net charge transfer, such as e.g. the anodic oxidation of H2 or the cathodic reduction of 02 in solid electrolyte cells utilizing YSZ ... [Pg.9]

These conclusions from the infrared reflectance spectra recorded with Pt and Pt-Ru bulk alloys were confirmed in electrocatalysis studies on small bimetallic particles dispersed on high surface area carbon powders.Concerning the structure of bimetallic Pt-Ru particles, in situ Extended X-Ray Absorption Fine Structure (EXAFS>XANES experiments showed that the particle is a true alloy. For practical application, it is very important to determine the optimum composition of the R-Ru alloys. Even if there are still some discrepancies, several recent studies have concluded that an optimum composition about 15 to 20 at.% in ruthenium gives the best results for the oxidation of methanol. This composition is different from that for the oxidation of dissolved CO (about 50 at.% Ru), confirming a different spatial distribution of the adsorbed species. [Pg.91]

A period of high research activity in electrocatalysis began after it had been shown in 1963 that fundamentally, an electrochemical oxidation of hydrocarbon fuel can be realized at temperatures below 150°C. This work produced a number of important advances. They include the discovery of synergistic effects in platinum-ruthenium catalysts used for the electrochemical oxidation of methanol. [Pg.552]

Another electro-oxidation example catalyzed by bimetallic nanoparticles was reported by D Souza and Sam-path [206]. They prepared Pd-core/Pt-shell bimetallic nanoparticles in a single step in the form of sols, gels, and monoliths, using organically modified silicates, and demonstrated electrocatalysis of ascorbic acid oxidation. Steady-state response of Pd/Pt bimetallic nanoparticles-modified glassy-carbon electrode for ascorbic acid oxidation was rather fast, of the order of a few tens of seconds, and the linearity was observed between the electric current and the concentration of ascorbic acid. [Pg.68]

In the electron transfer theories discussed so far, the metal has been treated as a structureless donor or acceptor of electrons—its electronic structure has not been considered. Mathematically, this view is expressed in the wide band approximation, in which A is considered as independent of the electronic energy e. For the. sp-metals, which near the Fermi level have just a wide, stmctureless band composed of. s- and p-states, this approximation is justified. However, these metals are generally bad catalysts for example, the hydrogen oxidation reaction proceeds very slowly on all. sp-metals, but rapidly on transition metals such as platinum and palladium [Trasatti, 1977]. Therefore, a theory of electrocatalysis must abandon the wide band approximation, and take account of the details of the electronic structure of the metal near the Fermi level [Santos and Schmickler, 2007a, b, c Santos and Schmickler, 2006]. [Pg.45]

Santos E, Schmickler W. 2007b. Electrocatalysis of hydrogen oxidation—Theoretical foundations. Angew Chem Int Ed 46 8262-8265. [Pg.55]

Outside of the double-layer region, water itself may be oxidized or reduced, leaving stable hydride, hydroxyl, or oxide layers on the electrode surface. These species may adsorb strongly and block sites from participating in electrocatalysis, as for example, hydroxyl species present at the polymer electrolyte membrane fuel cell... [Pg.105]

Femandez-Vega A, Feliu JM, Aldaz A, Clavilier J. 1991. Heterogeneous electrocatalysis on well-deflned platinum surfaces modifled by controlled amounts of irreversibly adsorbed adatoms Part IV. Formic acid oxidation on the Pt(lll)-As system. J Electroanal Chem 305 229-240. [Pg.201]

Lamy C, Leger JM, Claviher J, Parsons R. 1983. Structural effects in electrocatalysis A comparative study of the oxidation of CO, HCOOH and CH3OH on single crystal Pt electrodes. J Electroanal Chem 150 71-77. [Pg.203]

Lebedeva NP, Rodes A, Feliu JM, Koper MTM, van Santen RA. 2002b. Role of crystalline defects in electrocatalysis CO adsorption and oxidation on stepped platinum electrodes as studied by in situ infrared spectroscopy. J Phys Chem B 106 9863-9872. [Pg.204]


See other pages where Electrocatalysis oxidation is mentioned: [Pg.160]    [Pg.160]    [Pg.2748]    [Pg.638]    [Pg.52]    [Pg.264]    [Pg.309]    [Pg.309]    [Pg.310]    [Pg.314]    [Pg.553]    [Pg.115]    [Pg.262]    [Pg.438]    [Pg.522]    [Pg.547]    [Pg.552]    [Pg.553]    [Pg.699]    [Pg.336]    [Pg.159]   
See also in sourсe #XX -- [ Pg.290 , Pg.291 ]




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Electrocatalysis of Hydrogen Oxidation

Methanol oxidation electrocatalysis

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