Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1989-03-07
1991-03-26
Niebling, John F.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204291, 204292, 204294, 429 42, 429 43, 427 58, 427113, 427355, C25B 1100
Patent
active
050026518
ABSTRACT:
Renewable composite microelectrodes for electrochemical applications are formed by an initial coating on an elongated conductive substrate of less than 500 micrometers over at least a portion of its length with a modifier composition, and a superposed coating of electronically resistive polymer. The initial coating is exposed only at the tip portion of the microelectrode. The initial coating may be an absorbed layer of the modifier, a homogeneous layer of a polymeric matrix with the modifier dispersed therein, or a layer of a polymer with a modifier in its chain. The modifier provides distinctive properties to the surface of the electrode which may be electroactivity, inclusion, acidic/basic, complexing/chelating or electrocatalysis. The microelectrode will normally be used with only the tip portion thereof immersed in the solution, and it may be renewed by removing the contaminated tip portion.
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Creasy Kenneth E.
Shaw Brenda R.
Gorgos Kathryn
Niebling John F.
University of Connecticut
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