Effect of rotation rate on the response at poly(chlorotrifluoroethylene) composite disk electrodes

Journal Article · Sun Jan 31 23:00:00 EST 1993 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00051a007· OSTI ID:5844897

Vitt, J E; Johnson, D C ^[1]; Tallman, D E ^[2]

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1. Iowa State Univ., Ames (United States)
2. North Dakota State Univ., Fargo (United States)

Microelectrode arrays were operated as rotated disk electrodes (RDEs) to examine the effects of convection on their voltammetric response. The microelectrode array RDEs were Kelgraf (graphite and Kel-F) and Au/Kelgraf (Au, graphite, and Kel-F) composite electrodes. As expected for microelectrode arrays, a significant enhancement in current density was observed in comparison to solid RDEs. For example, the current density for the oxidation of hydrazine at a rotation rate of 10.5 rad s[sup [minus]1] was 13 times larger at a 2% Au/10% Kelgraf RDE than at a solid Au RDE. The relative current density (J) was defined as the ratio of the current density at a microelectrode array RDE in comparison to that at a solid RDE. The largest values of J were obtained for the lowest values of rotation rate and for ca. 2--3% active area; however, the values of J were dependent on the choice of the test reaction. 48 refs., 10 figs., 1 tab.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5844897
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Journal Issue: 3 Vol. 65:3; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
CARBON
CHEMICAL REACTIONS
COMPLEXES
COMPOSITE MATERIALS
CONVECTION
CURRENT DENSITY
DATA
ELECTRODES
ELEMENTAL MINERALS
ELEMENTS
ENERGY TRANSFER
EXPERIMENTAL DATA
FERROCYANIDES
GOLD
GRAPHITE
HEAT TRANSFER
HYDRAZINE
INFORMATION
IRON COMPLEXES
MASS TRANSFER
MATERIALS
METALS
MINERALS
MOTION
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
POLYMERS
ROTATION
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
VOLTAMETRY