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• W1591713043 abstract "A catalytic electrode was prepared using a new electrically conducting and corrosion resistant carbon support material, boron-doped diamond. Fabrication of the composite electrode involves a three-step process: (i) continuous diamond thin-film deposition on a substrate, (ii) electrodeposition of Pt catalyst particles on the diamond surface, and (iii) short-term diamond deposition to entrap the metal particles into the surface microstructure. The process results in a conductive, morphologically, and microstructurally stable composite electrode containing metal particles of somewhat controlled composition, size, and catalytic activity. The metal catalyst particles were galvanostatically deposited from a solution, with the metal particle size (50-350 nm) and distribution being controlled by adjusting the galvanostatic deposition and secondary diamond-growth conditions. For a 300 s Pt deposition time, the estimated loading was assuming a 100% current efficiency. The composite electrode was extremely stable, both structurally and catalytically, during a 2 h polarization in 85% at 170°C and The electrode's catalytic activity was evaluated using the reduction reaction at room temperature in 0.1 M solutions of and The kinetic parameters (Tafel slope and exchange current density) were obtained by cyclic voltammetry and were found to be comparable to those for a polycrystalline Pt electrode in the same media. Tafel slopes of to were observed at low overpotentials, with the lowest slope in and highest in The exchange current density ranged from to and increased in the order of The potential advantages of the composite electrode, as compared with commercial carbon electrodes, are (i) the corrosion resistance of the diamond support, resulting in highly stable reaction centers at high potentials, current densities, and temperatures, and (ii) the fact that all of the catalyst particles are strongly anchored at the film surface and are not contained inside pores. © 2002 The Electrochemical Society. All rights reserved." @default.
• W1591713043 created "2016-06-24" @default.
• W1591713043 creator A5032764121 @default.
• W1591713043 creator A5073641507 @default.
• W1591713043 date "2003-01-01" @default.
• W1591713043 modified "2023-09-24" @default.
• W1591713043 title "Fabrication and Evaluation of Platinum/Diamond Composite Electrodes for Electrocatalysis" @default.
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• W1591713043 doi "https://doi.org/10.1149/1.1524612" @default.
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