Nanoelectrochemistry of Adsorption‐Coupled Electron Transfer at Carbon Electrodes

2019 ◽  
pp. 1-31
Author(s):  
Shigeru Amemiya
Keyword(s):  
Electron Transfer ◽  
Carbon Electrodes

Direct electron transfer reactions of laccases from different origins on carbon electrodes

2005 ◽  
Vol 67 (1) ◽  
pp. 115-124 ◽  
Author(s):  
Sergey Shleev ◽  
Anna Jarosz-Wilkolazka ◽  
Anna Khalunina ◽  
Olga Morozova ◽  
Alexander Yaropolov ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Transfer Reactions ◽  
Carbon Electrodes ◽  
Electron Transfer Reactions ◽  
Different Origins

Flow Battery Electroanalysis 2: Influence of Surface Pretreatment on Fe(III/II) Redox Chemistry at Carbon Electrodes

2018 ◽  
Author(s):  
Tejal Sawant ◽  
James McKone
Keyword(s):  
Electron Transfer ◽  
Photoelectron Spectroscopy ◽  
Large Scale ◽  
Redox Chemistry ◽  
Rotating Disk Electrode ◽  
Electrochemical Activation ◽  
Carbon Electrodes ◽  
Electron Transfer Kinetics ◽  
Treatment Protocols ◽  
Flow Batteries

<p>Redox flow batteries are attractive for large-scale electrochemical energy storage, but sluggish electron transfer kinetics often limit their overall energy conversion efficiencies. In an effort to improve our understanding of these kinetic limitations in transition metal based flow batteries, we used rotating-disk electrode voltammetry to characterize the electron-transfer rates of the Fe<sup>3+/2+</sup> redox couple at glassy carbon electrodes whose surfaces were modified using several pre-treatment protocols. We found that surface activation by electrochemical cycling in H<sub>2</sub>SO<sub>4</sub>(aq) electrolyte resulted in the fastest electron-transfer kinetics: j<sub>0</sub> = 0:90 mA/cm<sup>2</sup> in an electrolyte containing 10 mM total Fe. By contrast, electrodes that were chemically treated to either remove or promote surface oxidation yielded rates that were at least an order of magnitude slower: j<sub>0</sub> = 0:07 and 0:08 mA/cm<sup>2</sup>, respectively. By correlating these findings with X-ray photoelectron spectroscopy data, we conclude that Fe<sup>3+/2+</sup> redox chemistry is catalyzed by carbonyl groups whose surface concentrations are increased by electrochemical activation.</p>

scholarly journals Electrocatalysis via Intrinsic Surface Quinones Mediating Electron Transfer to and from Carbon Electrodes

2020 ◽  
Vol 11 (4) ◽  
pp. 1497-1501 ◽  
Author(s):  
Danlei Li ◽  
Christopher Batchelor-McAuley ◽  
Lifu Chen ◽  
Richard G. Compton
Keyword(s):  
Electron Transfer ◽  
Carbon Electrodes
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