Controlled Tuning of the Ferri/Ferrocyanide Electron Transfer at Oligo(Ethylene Glycol)-Modified Electrodes

2016 ◽  
Vol 219 ◽  
pp. 412-417 ◽  
Author(s):  
Thomas Doneux ◽  
Linda Yahia Cherif ◽  
Claudine Buess-Herman
Keyword(s):  
Electron Transfer ◽  
Ethylene Glycol ◽  
Modified Electrodes

Electron transport in clay-modified electrodes: study of electron transfer between electrochemically oxidized tris (2,2′-bipyridyl) iron cations and clay structural iron(II) sites

1992 ◽  
Vol 70 (6) ◽  
pp. 1833-1837 ◽  
Author(s):  
Yan Xiang ◽  
Gilles Villemure
Keyword(s):  
Electron Transfer ◽  
Modified Electrodes ◽  
Quantitative Relation ◽  
Cyclic Voltammograms ◽  
Slow Electron ◽  
Cathodic Current ◽  
Peak Current ◽  
Scan Speed ◽  
Anodic Peak Current ◽  
Structural Iron

The cyclic voltammograms of tris (2,2′-bipyridyl) iron(II) ([Fe(bpy)3]2+) adsorbed in clay-modified electrodes made from a range of different smectites were recorded. In all cases, at low scan speed (1 mV/s), the initial anodic peak current was much larger than the initial cathodic peak current. Partial reduction of the clay structural iron further increased the initial anodic to cathodic current ratio, suggesting that the discrepancy between the charge transferred in the anodic and cathodic scans was due to a slow electron transfer between the clay structural Fe(II) and the oxidized bipyridyl cations. However, no clear quantitative relation was found between the measured FeO contents of the different clays and the observed excess anodic currents. In fact, of all the clays tested only one, montmorillonite SWy-1, contained enough Fe(II) for it to account for all of the excess anodic charge transferred in the initial scan.

Facilitated proton transfer-electron transfer coupled reactions at thick-film modified electrodes

2017 ◽  
Vol 258 ◽  
pp. 727-734 ◽  
Author(s):  
Franco Martín Zanotto ◽  
Ricardo Ariel Fernández ◽  
Sergio Alberto Dassie
Keyword(s):  
Electron Transfer ◽  
Proton Transfer ◽  
Thick Film ◽  
Modified Electrodes ◽  
Coupled Reactions

scholarly journals Diffusional transport to and through thin-layer nanoparticle film modified electrodes: capped CdSe nanoparticle modified electrodes

2014 ◽  
Vol 16 (33) ◽  
pp. 18034-18041 ◽  
Author(s):  
William G. Hepburn ◽  
Christopher Batchelor-McAuley ◽  
Kristina Tschulik ◽  
Edward O. Barnes ◽  
Roohollah Torabi Kachoosangi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Thin Layer ◽  
Modified Electrodes ◽  
Electron Transfer Kinetics ◽  
Nanoparticle Film

Non-electroactive layers on electrodes can significantly alter the apparent electron transfer kinetics leading to both enhanced and suppressed rates.

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