scholarly journals The influence of mass-transport conditions on the ethanol oxidation reaction (EOR) mechanism of Pt/C electrocatalysts

2016 ◽  
Vol 18 (36) ◽  
pp. 25169-25175 ◽  
Author(s):  
Antoine Bach Delpeuch ◽  
Marjorie Jacquot ◽  
Marian Chatenet ◽  
Carsten Cremers
Keyword(s):  
Mass Transport ◽  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Ethanol Oxidation Reaction ◽  
Scan Rate ◽  
The Revolution

This study aims to provide further understanding of the influence of different parameters that control mass-transport (the revolution rate of the rotating disk electrode and the potential scan rate) on the ethanol oxidation reaction (EOR).

scholarly journals Alkaline Ethanol Oxidation Reaction on Carbon Supported Ternary PdNiBi Nanocatalyst using Modified Instant Reduction Synthesis Method

2020 ◽  
Vol 11 (2) ◽  
pp. 203-214
Author(s):  
Bernd Cermenek ◽  
Boštjan Genorio ◽  
Thomas Winter ◽  
Sigrid Wolf ◽  
Justin G. Connell ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
Synthesis Method ◽  
Compositional Analysis ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
The Other ◽  
Ethanol Oxidation Reaction ◽  
Direct Ethanol Fuel Cells ◽  
Onset Potential

AbstractDirect ethanol fuel cells (DEFC) still lack active and efficient electrocatalysts for the alkaline ethanol oxidation reaction (EOR). In this work, a new instant reduction synthesis method was developed to prepare carbon supported ternary PdNiBi nanocatalysts with improved EOR activity. Synthesized catalysts were characterized with a variety of structural and compositional analysis techniques in order to correlate their morphology and surface chemistry with electrochemical performance. The modified instant reduction synthesis results in well-dispersed, spherical Pd85Ni10Bi5 nanoparticles on Vulcan XC72R support (Pd85Ni10Bi5/C(II-III)), with sizes ranging from 3.7 ± 0.8 to 4.7 ± 0.7 nm. On the other hand, the common instant reduction synthesis method leads to significantly agglomerated nanoparticles (Pd85Ni10Bi5/C(I)). EOR activity and stability of these three different carbon supported PdNiBi anode catalysts with a nominal atomic ratio of 85:10:5 were probed via cyclic voltammetry and chronoamperometry using the rotating disk electrode method. Pd85Ni10Bi5/C(II) showed the highest electrocatalytic activity (150 mA⋅cm−2; 2678 mA⋅mg−1) with low onset potential (0.207 V) for EOR in alkaline medium, as compared to a commercial Pd/C and to the other synthesized ternary nanocatalysts Pd85Ni10Bi5/C(I) and Pd85Ni10Bi5/C(III). This new synthesis approach provides a new avenue to developing efficient, carbon supported ternary nanocatalysts for future energy conversion devices.

scholarly journals Rapid electrochemical detection of Escherichia coli using nickel oxidation reaction on a rotating disk electrode

2021 ◽  
Vol 411 ◽  
pp. 128453
Author(s):  
Ashwin Ramanujam ◽  
Bertrand Neyhouse ◽  
Rebecca A. Keogh ◽  
Madhivanan Muthuvel ◽  
Ronan K. Carroll ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Electrochemical Detection ◽  
Oxidation Reaction ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Nickel Oxidation

Chemical and electrochemical oxidation of phenothiazine

1993 ◽  
Vol 71 (5) ◽  
pp. 674-677 ◽  
Author(s):  
Alexei N. Pankratov ◽  
Inna M. Uchaeva ◽  
Alexander N. Stepanov
Keyword(s):  
Electrochemical Oxidation ◽  
Sulphuric Acid ◽  
Quantum Chemical ◽  
Oxidation Reaction ◽  
Cation Radical ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Diffusion Controlled ◽  
Voltammetric Technique

The oxidation of phenothiazine in dilute solutions of sulphuric acid leads to the corresponding cation radical. Using a potentiometric technique, a pKa value of 5.72 ± 0.05 was determined for phenothiazine. The kinetics has been studied and participation of both protonated and unprotonated oxidant in the oxidation reaction has been confirmed. Using a voltammetric technique with a rotating disk electrode, the anodic oxidation of phenothiazine was shown to be a one-electron diffusion-controlled process. A quantum chemical explanation was found for the direction of phenothiazine protonation and the absence of a dimerization stage of oxidation.

scholarly journals Analysis of mass transport in ionic liquids: a rotating disk electrode approach

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andrea Giaccherini ◽  
Maher Al Khatib ◽  
Serena Cinotti ◽  
Emanuele Piciollo ◽  
Enrico Berretti ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Mass Transport ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode
Sign in / Sign up

Export Citation Format

Share Document