Electrooxidation of CO and H2/CO mixtures on Pt(111) in acid solutions

Article Abstract:

Rotating disk electrode and in situ surface X-diffraction methods were used to study the electrocatalysis of CO oxidation and the interfacial structure of the CO adlayer (COad) on the Pt(111) surface in 0.5 M H2SO4 acid solution. Two different forms of COad were observed. One form is oxidized at lower overpotentials in a weakly adsorbed state, while the other is oxidized at higher overpotentials in a strongly adsorbed state. Results also suggested that the electrooxidation of CO in the acid solution occurs via the two COad states.

Oxidation-reduction reaction, Oxidation-reduction reactions, Monomolecular films, Acids

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Electrooxidation of H2, CO, and H2/CO mixtures on a well-characterized Pt70Mo30 bulk array electrode

Article Abstract:

A study was conducted to analyze the electrochemical oxidation of hydrogen, carbon monoxide and their mixtures on Pt70Mo30 bulk alloy using the rotating disk electrode method. The polycrystalline Pt-Mo alloy was made as a boule by arc-melting of the pure elements in an argon atmosphere and a homogenizing heat treatment. Experimental results indicated that the kinetics of H2 oxidation were not measurably affected by the presence of molybdenum on the surface.

Hydrogen, Electrochemistry, Platinum alloys, Molybdenum alloys

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Surface electrochemistry of CO and H2/CO mixtures at Pt(100) interface: electrode kinetics and interfacial structures

Article Abstract:

Rotating disk methods and in-situ surface X-ray scattering measurements have been used to assess the Pt(100)-COad interaction in aqueous electrolytes. The topmost platinum atoms were found to expand away from the second layer by around 4% when Hupd was totally displaced from Pt(100) by CO to create a saturated layer of COad.

Electrolytes

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