scholarly journals Insights into the design of homogeneous electrocatalytic flow sensor via a rotating disc electrode system

2021 ◽  
pp. 109763
Author(s):  
Peng Song ◽  
Shuang Yin ◽  
Zhan Wang
Keyword(s):  
Electrode System ◽  
Flow Sensor ◽  
Rotating Disc Electrode ◽  
Disc Electrode ◽  
Rotating Disc

Bromate Reaction on a Rotating Disc Electrode: A New Method of Obtaining Approximate Analytical Solutions for Stationary Regime

2018 ◽  
Vol 483 (1) ◽  
pp. 256-260
Author(s):  
M. A. Vorotyntsev ◽  
A. E. Antipov ◽  
M. M. Petrov ◽  
R. D. Pichugov ◽  
E. I. Borisevich ◽  
...  
Keyword(s):  
Analytical Solutions ◽  
Stationary Regime ◽  
New Method ◽  
Rotating Disc Electrode ◽  
Disc Electrode ◽  
Rotating Disc ◽  
Approximate Analytical Solutions

scholarly journals Redox Property Tuning in Bipyridinium Salts

2021 ◽  
Vol 8 ◽  
Author(s):  
Zuzana Burešová ◽  
Milan Klikar ◽  
Petr Mazúr ◽  
Michaela Mikešová ◽  
Jaroslav Kvíčala ◽  
...  
Keyword(s):  
Redox Processes ◽  
Rotating Disc Electrode ◽  
Structure Property ◽  
Disc Electrode ◽  
Rotating Disc ◽  
Half Cell ◽  
Redox Flow Batteries ◽  
Structure Property Relationships ◽  
Reversible Redox ◽  
Small Capacity

Bipyridinium salts are currently very popular due to their perspective applications in redox flow batteries. Hence, we designed and prepared a series of bipyridiniums based on 2,2′-, 3,3′-, and 4,4′-bipyridine and 2,2′-bipyrimidine. The straightforward synthesis utilizes commercially or readily available starting compounds and their direct N-alkylation, mostly using 1,3-propanesultone. All eleven target derivatives with systematically evolved structure were investigated by cyclic voltammetry, which allowed elucidating thorough structure-property relationships. The electrochemical behavior depends primarily on the parent scaffold, type of N-alkylation, number of quaternized nitrogen atoms, planarity, counter ion as well as the used media. Two derivatives featuring quasi-reversible redox processes were further tested on rotating disc electrode and in a flow battery half-cell. 4,4′-Bipyridinium derivative bearing two sultone residues showed better performance and stability in the flow half-cell with small capacity decays of 0.09/0.15% per reduction-oxidation cycle, based on the number of the utilized redox processes (one/two).

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