The aim of this report is to scrutinize the thin-film rotating disk electrode (TF-RDE) method for studying the electrocatalytic activity of high surface area catalysts. Special emphasis is given to the oxygen redn. reaction (ORR) on C-supported Pt catalysts. From measurements on 4 different Pt catalyst samples with various av. particle sizes, it is demonstrated in detail how the intrinsic properties of the catalyst, i.e., the mass activity (A/gPt) and the specific activity (A/m2Pt), are evaluated. The potential sources of error are critically discussed and guidelines for the measurements are given. Also, the specific ORR activities detd. for the different catalyst samples are analyzed and compared to polycryst. Pt. The previously reported effect of the particle size on the specific activity for the ORR is interpreted from the shift in the potential of zero total charge and the concomitant alteration of the adsorption properties. [on SciFinder(R)]     «

The aim of this report is to scrutinize the thin-film rotating disk electrode (TF-RDE) method for studying the electrocatalytic activity of high surface area catalysts. Special emphasis is given to the oxygen redn. reaction (ORR) on C-supported Pt catalysts. From measurements on 4 different Pt catalyst samples with various av. particle sizes, it is demonstrated in detail how the intrinsic properties of the catalyst, i.e., the mass activity (A/gPt) and the specific activity (A/m2Pt), are evaluate...     »

Reduction catalysts (electrochem. polycryst. Pt to carbon-supported Pt nanoparticle for oxygen) Reduction (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts) Nanoparticles Surface area (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts in HClO4 soln.) Particle size (nanoscale measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts in HClO4 soln.) oxygen redn platinum rotating disk electrode catalyst     «

Reduction catalysts (electrochem. polycryst. Pt to carbon-supported Pt nanoparticle for oxygen) Reduction (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts) Nanoparticles Surface area (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts in HClO4 soln.) Particle size (nanoscale m...     »

CAN 148:412833 72-2 Electrochemistry Technische Universitaet Muenchen, Garching, Deutschland, Germany. Journal 0013-4686 7440-06-4 (Platinum); 7440-44-0 (Carbon) Role: CAT (Catalyst use), TEM (Technical or engineered material use), USES (Uses) (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts); 7782-44-7 (Oxygen) Role: RCT (Reactant), RACT (Reactant or reagent) (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts); 7601-90-3 (Perchloric acid) Role: NUU (Other use, unclassified), USES (Uses) (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts in HClO4 soln.)     «

CAN 148:412833 72-2 Electrochemistry Technische Universitaet Muenchen, Garching, Deutschland, Germany. Journal 0013-4686 7440-06-4 (Platinum); 7440-44-0 (Carbon) Role: CAT (Catalyst use), TEM (Technical or engineered material use), USES (Uses) (measurement of oxygen redn. activities via the rotating disk electrode method from polycryst. Pt to carbon-supported Pt nanoparticle high surface area catalysts); 7782-44-7 (Oxygen) Role: RCT (Reactant), RACT (Reactant or reagent) (measurement of oxygen...     »