Evaluation of the diffusion coefficient of the zincate ion using a rotating disk electrode

1986 ◽  
Vol 64 (3) ◽  
pp. 523-527 ◽  
Author(s):  
Elisabete Jorge Pessine ◽  
Silvia M. L. Agostinho ◽  
Hélio C. Chagas
Keyword(s):  
Aqueous Solution ◽  
Diffusion Coefficient ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Experimental Results ◽  
Alkali Concentration ◽  
Disk Electrode ◽  
Disc Electrode ◽  
Einstein Theory ◽  
Temperature Range

Using a rotating Hg-film disc electrode, the diffusion coefficient of the zincate ion in a 1–4 M aqueous solution of NaOH was measured. Experiments covered a temperature range from 25 to 40 °C. The experimental results are in agreement with the predictions of the Stokes–Einstein theory for diffusivity. The obtained Stokes radii decrease with increasing alkali concentration, but the ratio Dη/T is reasonably constant within the whole range of temperature investigated

scholarly journals Wireless rotating disk electrode (wRDE) for assessing heterogeneous water oxidation catalysts (WOCs)

2016 ◽  
Vol 52 (49) ◽  
pp. 7727-7730
Author(s):  
A. Mills ◽  
C. O'Rourke
Keyword(s):  
Water Oxidation ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Oxidation Catalyst ◽  
Rotating Disc Electrode ◽  
Disk Electrode ◽  
Disc Electrode ◽  
Rotating Disc ◽  
Novel Method ◽  
Kinetics Of

A novel method for assessing the activity of a powdered water oxidation catalyst (WOC) is described, utilising an easily-prepared wireless rotating disc electrode of the WOC, thereby allowing its activity to be probed, via the observed kinetics of water oxidation by Ce(iv) ions, and so provide invaluable electrochemical information.

scholarly journals Carbon-Supported Pt-SnO2 Catalysts for Oxygen Reduction Reaction over a Wide Temperature Range: Rotating Disk Electrode Study

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1469
Author(s):  
Ruslan M. Mensharapov ◽  
Nataliya A. Ivanova ◽  
Dmitry D. Spasov ◽  
Elena V. Kukueva ◽  
Adelina A. Zasypkina ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Catalyst Activity ◽  
Rotating Disk ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Composite Catalyst ◽  
Kinetic Properties ◽  
Disk Electrode ◽  
Temperature Range

Pt/C and Pt/x-SnO2/C catalysts (where x is mass content of SnO2) were synthesized using a polyol method. Their kinetic properties towards oxygen reduction reaction were studied by a rotating disk electrode (RDE) technique in a temperature range from 1 to 50 °C. The SnO2 content of catalyst samples was 5 and 10 wt.%. A quick evaluation of the catalyst activity, electrochemical behavior and average number of transferred electrons were performed using the RDE technique. It has been shown that the use of x-SnO2 (through modification of the carbon support) in a binary system together with Pt does not reduce the catalyst activity in the temperature range of 1–30 °C. The temperature rising up to 50 °C resulted in composite catalyst activity reduction at about 30%.

Electrochemical Reduction of Nitrous Oxide (N2O) Catalysed by Tetraaminophthalocyanatocobalt(II) Adsorbed on a Graphite Electrode in Aqueous Solution

1997 ◽  
Vol 01 (04) ◽  
pp. 323-331 ◽  
Author(s):  
JIUJUN ZHANG ◽  
YU-HONG TSE ◽  
A. B. P. LEVER ◽  
W. J. PIETRO
Keyword(s):  
Aqueous Solution ◽  
Nitrous Oxide ◽  
Electrochemical Reduction ◽  
Modified Electrode ◽  
Electrocatalytic Activity ◽  
Graphite Electrode ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Ph Range

The surface electrochemical response of the Co II/ Co I redox process of tetraaminophthalocyaninatocobalt(II) ( Co II TAPc ) adsorbed on a graphite electrode, was studied in the pH range of 2–13. In aqueous solution, the Co II TAPc adsorbed graphite electrode displays very strong electrocatalytic activity toward N 2 O reduction to N 2, a process which was examined by cyclic and rotating disk electrode voltammetries. The possible application of this Co II TAPc modified electrode in N 2 O analysis was explored.

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