Kinetic analysis of oxygen reduction on Pt (111) in acid solutions: intrinsic kinetic parameters and anion adsorption effects

Article Abstract:

A study was conducted on the oxygen reduction reaction (ORR) kinetics in acid solutions by an analysis of the polarization curves obtained by rotating disk electrode method for Pt (111) in HClO4 and H2SO4 solutions. For Pt nanoparticle catalysts, the apparent Tafel slope is similar to that for Pt (111) in HClO3 and the positive potential shit is mainly due to the increase in apparent exchange current as effective surface area increases.

Acid-base chemistry

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Spectroscopic identification of the reaction intermediates in oxygen reduction on gold in alkaline solutions

Article Abstract:

Surface enhanced infrared reflection-absorption spectroscopy with an attentuated total reflection configuration (ATR-SEIRAS) is used to identify the intermediates of the oxygen reduction reaction (ORR) on gold electrodes. It is concluded that the interaction between HO(sub 2)(super -) and Au surfaces is very weak in acidic solutions, which agrees with the observed 2e(super -) reduction mechanism.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Gold Compounds, Alkaline earth metal compounds

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Platinum monolayer on nonnoble metal-noble metal core-shell nanoparticle electrocatalysts for O(sub 2) reduction

Article Abstract:

A new class of O(sub 2) electrocatalysts with a high activity and very low noble metal content is synthesized. The mass activity of the three Pt monolayer electrocatalysts is investigated and the results demonstrates that high-activity electrocatalysts can be devised that contains only a fractional amount of Pt and a very small amount of another noble metal.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Monomolecular films, Nanoparticles

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