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Electrode Arrangement for High Uniform Electrolytic Diffusion Currents

IP.com Disclosure Number: IPCOM000093769D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Dahms, H: AUTHOR

Abstract

This is an electrode arrangement. Two planar parallel electrodes are placed within the diffusion layer so that only a thin film of electrolyte remains between the electrodes.

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Electrode Arrangement for High Uniform Electrolytic Diffusion Currents

This is an electrode arrangement. Two planar parallel electrodes are placed within the diffusion layer so that only a thin film of electrolyte remains between the electrodes.

The arrangement controls the thickness of the diffusion layer i.e., the layer of liquid adjacent the electrode. The device allows the positioning of the counter electrode within the diffusion layer so that high and uniform diffusion current rates are obtained.

Micrometer arrangement 1 has planar gold disks 2a and 2b attached to anvil 3 and spindle 4 in face-to-face relationship. Disk 2a on anvil 3 is electrically insulated from micrometer 1 by thin MYLAR* film 5 interposed between disk 2a and anvil 3.

The periphery of the facing surfaces of disks 2a and 2b is insulated by photoresist 6 so that the active electrode is a circular area 1. 26 cm/2/ at the center of disks 2a 2b. An electrolyte, for example, a * Trademark of E.I. Du Pont de Nemours & Co. solution of 10/-2/ M FeSO(4) 10/-2/M Fe(2)(SO(4))(3) in 1M H(2)SO(4) is introduced between the electrode or disks 2a and 2b from a DC source not shown. Micrometer screw 7 adjusts the distance between electrodes. The resulting diffusion current is shown in the accompanying graph as a function of distance between the electrodes. The resulting current is inversely proportional to the spacing between the electrodes and is higher than heretofore obtainable.

High rates of diffusion f...