Structural and spectroelectrochemical study of carbonate and bicarbonate adsorbed on Pt(111) and Pd/Pt(111) electrodes

Article Abstract:

Spectroelectrochemical experiments and density functional theory (DFT) based calculations were combined to elucidate the nature of the species adsorbed when a perchloric acid solution with carbon dioxide was in contact with well-defined electrode surfaces. The DFT calculations and the pH dependent behavior of the main adsorbate vibrational bands, suggested that for potentials below 0.65 V, bicarbonate species were adsorbed at the Pt(111) electrode surface in a short-bridge bidentate configuration.

Industrial Gas Manufacturing, Industrial gases, Carbon Dioxide, Analysis, Adsorption, Density functionals, Density functional theory, Chemical properties

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Pt(II) as an elasticity active surface site in the room temperature CO response of the Pt modified gas sensitive resistors

Article Abstract:

Pt additives, finely dispersed over a semiconducting oxide surface, induce a room temperature CO resistance and have shown the sensitivity of the electrical conductivity to the surface state of Pt is demonstrated. The study of BaSnO3 and BaFeO3 that the effect can only be observed in the case where Pt states are observed in the band gap, and the oxide conductivity is dominated by electron exchange with these states.

Observations, Electric properties, Thermal properties, Chemistry, Physical and theoretical, Physical chemistry, Electrical conductivity, Platinum compounds

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Adsorption of CO at palladium monolayers deposited on Pt(111) electrodes. Combined spectroelectrochemical and theoretical study

Article Abstract:

Experimental and calculated spectra for palladium deposited on Pt(111) are compared in order to elucidate the possible adsorption site and to interpret the main features of the experimental spectra. The study concluded that the combined use of spectoelectrochemical and first principles calculations is a promising and powerful tool for the interpretation of complex electrochemical interfaces.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Palladium, Usage, Spectra, Electrochemistry

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