Surface structures and phase transitions at the Au(100)-Br interface: pH and CO effects

Article Abstract:

A combination of electrochemical (EC) and surface X-ray scattering (SXS) measurements are used to study the surface reconstruction of Au(100) and the formation of a commensurate c(radic 2 x 22 radic 2)R45 degrees structure of the bromide (Br) adlayer. The role of adsorbed oxygenated species (OH(sub ad)) is established by monitoring the microscopic interface structures of Br(sub ad) during the consumption of OH(sub ad) in an electrochemical reaction in which strongly adsorbed OH(sub ad) is removed from the surface by a relatively weak adsorbed reactant, CO(sub ad).

Electrochemistry, Surface chemistry, Anions

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Oxygen reduction on silver low-index single-crystal surfaces in alkaline solution: Rotating ring disk[sub Ag(hkl)] studies

Article Abstract:

The rotating ring disk method is applied to examine the oxygen reduction reaction (ORR) on Ag single-crystal surfaces in alkaline solution over the temperature range 293-333 K. The oxygen reduction reaction proceeds as the serial 4e(super-) reaction pathway with a very small peroxide formation and the order of activity of Ag(hkl) in 0.1 M KOH has increased in the sequence (110) lesser than equal to (111) lesser than (100).

Oxidation-reduction reaction, Oxidation-reduction reactions, Silver compounds, Chemical properties, Alkaline earth metals

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The impact of geometric and surface electronic properties of Pt-catalysts on the particle size effect in electrocatalysis

Article Abstract:

The particle size effect on the formation of OH adlayer, the CO bulk oxidation, and the oxygen reduction reaction (ORR) is studied on Pt nanoparticles in perchloric acid electrolyte. The potential of total zero charge that shifts approximately 35 mV negative by decreasing the particle size from 30 nm down to 1 nm is yielded.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), California, Industrial Gas Manufacturing, Platinum, Industrial gases, Carbon Monoxide, Electric properties

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