Electrocatalytic Oxidation of Oxalic Acid Using a Multielectrolytic Modified Glassy Carbon Electrodes

2015 ◽  
Vol 833 ◽  
pp. 35-38
Author(s):  
Syuhei Akabe ◽  
Koichi Asaka ◽  
Takuto Takahashi ◽  
Tsubasa Kitamura ◽  
Hiroaki Matsuura ◽  
...  

Electrocatalytic oxidation activity of oxalic acid can be observed by using a multielectrolytic modified glassy carbon electrode (MMGCE). The MMGCE was fabricated by using the following electrolytic-oxidation/reduction processes. First, the functional groups containing nitrogen atoms such as amino group are introduced by the electrode oxidation of a bare glassy carbon electrode in an ammonium carbamate aqueous solution, and next, this electrode was electroreduced in sulfuric acid, and it was found that the reduction current gradually increased as the electrolysis time increased. This suggests that functional groups containing nitrogen atoms contributing the catalytic electron transfer of hydrogen ion are introduced. To observe the electrode oxidation wave of oxalic acid, the voltammmetric measurements of oxalic acid was carried out by using MMGCE in an acidic medium. The oxidation wave of oxalic acid at low potential range was appeared in the linear sweep voltammograms. The MMGCE exhibited well-defined peak of oxalic acid oxidation in acidic medium.

The Analyst ◽  
2020 ◽  
Vol 145 (23) ◽  
pp. 7546-7550
Author(s):  
Yingying Chen ◽  
Zhihui Qiao ◽  
Huan Liu ◽  
Qingqing Yuan ◽  
Qingji Xie ◽  
...  

A glassy carbon electrode after the simultaneous underpotential deposition of Bi and bulk deposition of Pt and Au, followed by the stripping of accessible Bi, shows high performance for the oxidation and amperometric analysis of formaldehyde.


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