Process for improving an electrode

Details Process for improving an electrode Process for improving an electrode

2001-07-18

2008-03-11

Phasge, Arun S. (Department: 1753)

Electrolysis: processes, compositions used therein, and methods

Electrolytic material treatment

Metal or metal alloy

C205S710000

Reexamination Certificate

active

07341655

ABSTRACT:
A process for increasing the active surface area of at least one electrode having a surface comprising a group VIII metal in an electrochemical cell, which also comprises at least one balancing electrode and an aqueous electrolyte which comprises nitrate ions, which comprises applying a sweeping voltage across the electrodes at a rate of at least 0.2 V/s, the sweeping voltage being from a lower voltage which is between the voltage at which hydrogen evolution occurs and −0.7 V to an upper voltage which is between −0.2 V and +0.3 V, all of the above voltages being with reference to a standard calomel reference electrode (VSCE).

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Chialvo, A. C., “The Active Surface Area Increase Of Rhodium Electrodes Through Electroreduction Of Oxide Layers Produced By Fast Periodic Potentials,” J. Electroanal. Chem., 237(1987) 237-250.

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