Tuning the Ratio of Pt(0)/Pt(II) in Well-Defined Pt Clusters Enables Enhanced Electrocatalytic Reduction/Oxidation of Hydrogen Peroxide for Sensitive Biosensing

2021 ◽  
Author(s):  
Nannan Wu ◽  
Lei Jiao ◽  
Shaojia Song ◽  
Xiaoqian Wei ◽  
Xiaoli Cai ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electrocatalytic Reduction ◽  
Oxidation Of Hydrogen

Oxidation of hydrogen peroxide at the dropping mercury electrode

1984 ◽  
Vol 49 (10) ◽  
pp. 2320-2331 ◽  
Author(s):  
Miroslav Březina ◽  
Martin Wedell
Keyword(s):  
Hydrogen Peroxide ◽  
Superoxide Anion ◽  
Ph Value ◽  
Mercury Electrode ◽  
Electrode Process ◽  
Electrochemical Processes ◽  
Dropping Mercury Electrode ◽  
Oxidation Of Hydrogen ◽  
Decreasing Ph ◽  
Rate Controlling Step

Reduction of oxygen and oxidation of hydrogen peroxide at the dropping mercury electrode are electrochemical processes strongly influenced both by the pH value and the anions in solution. With decreasing pH, both processes become irreversible, especially in the presence of anions with a negative φ2 potential of the diffusion part of the double layer. In the case of irreversible oxygen reduction, the concept that the rate-controlling step of the electrode process is the acceptance of the first electron with the formation of the superoxide anion, O2-, was substantiated. Oxidation of hydrogen peroxide becomes irreversible at a lower pH value than the reduction of oxygen. The slowest, i.e. rate-controlling step of the electrode process in borate buffers at pH 9-10 is the transfer of the second electron, i.e. oxidation of superoxide to oxygen.

Study on the Electrochemical Behavior of Ferric Stearate and its Electro-Catalytic Oxidation of Hydrogen Peroxide

2009 ◽  
Vol 610-613 ◽  
pp. 161-164
Author(s):  
Li Li Liang ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Hydrogen Peroxide ◽  
Cyclic Voltammetry ◽  
Catalytic Oxidation ◽  
Tin Oxide ◽  
Electrochemical Behavior ◽  
Doctor Blade ◽  
Conductive Glass ◽  
Oxidation Of Hydrogen ◽  
Electro Catalytic Oxidation ◽  
Catalytic Effects

A ferric stearate electrode was made by doctor-blade methods using the Fluorine tin oxide (FTO) conductive glass. The electrochemical behavior of ferric stearate electrode was studied by the cyclic voltammetry. The electro-catalytic effects of ferric stearate on H2O2 were also investigated by cyclic voltammetry.

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