Relation between the activity of electrodes from various carbonaceous meterials for reduction of oxygen to hydrogen peroxide and concentration of their paramagnetic centers

1980 ◽  
Vol 45 (12) ◽  
pp. 3249-3253 ◽  
Author(s):  
Jan Balej ◽  
Karel Balogh ◽  
Pavel Stopka ◽  
Otomar Špalek
Keyword(s):  
Hydrogen Peroxide ◽  
Alkali Metal ◽  
Porous Electrodes ◽  
Substantial Decrease ◽  
Current Yield ◽  
Paramagnetic Centers ◽  
Carbonaceous Materials

The current yield of hydrogen peroxide during cathodic readuction of oxygen in porous electrodes from various carbonaceous materials is the lower the higher is the number of paramagnetic centers in these materials. A substantial decrease in the concentration of paramagnetic centers by heating to 900 °C in vacuum is only temporary, whereas by heating with alkali metal sulphides it is practically permanent.

Porous electrodes for hydrogen peroxide preparation by oxygen reduction. The influence of temperature and pressure applied in preparation of the electrodes on their functional properties

1981 ◽  
Vol 46 (9) ◽  
pp. 2052-2059 ◽  
Author(s):  
Otomar Špalek ◽  
Jan Balej
Keyword(s):  
Hydrogen Peroxide ◽  
Carbon Black ◽  
Current Density ◽  
Porous Electrodes ◽  
Current Yield ◽  
Electric Resistance ◽  
Influence Of Temperature ◽  
Electrode Mass ◽  
Temperature And Pressure ◽  
Wetted Surface Area

The influence of the temperature and pressure applied in preparation of porous electrodes from Teflon-bonded carbon black on the hydrogen peroxide current yield and the current density was investigated. The porous structure, the wetted surface area of carbon black, and the electric resistance of the electrode mass were examined in order to establish the factors responsible for the varying electrode activity.

Porous electrodes for the preparation of peroxide by reduction of oxygen; Influence of the content of polyethylene

1979 ◽  
Vol 44 (4) ◽  
pp. 996-1002 ◽  
Author(s):  
Otomar Špalek
Keyword(s):  
Carbon Black ◽  
Current Density ◽  
Porous Electrodes ◽  
Current Yield ◽  
Electric Resistance ◽  
Polyethylene Powder

With porous electrodes prepared by pressing a mixture of carbon black and polyethylene powder, the influence of the content of the binder on their electric resistance, wettability, current density, and current yield of peroxide during reduction of oxygen was studied.

Removal of COD and color from textile industrial effluents using different carbonaceous materials modified with acids, salts, and hydrogen peroxide

2020 ◽  
Vol 184 ◽  
pp. 1-14
Author(s):  
Juana Díaz de León Chiquito ◽  
Rigoberto Tovar Gómez ◽  
Ma. del Rosario Moreno Virgen ◽  
Carlos Javier Durán Valle ◽  
María Ana Pérez Cruz
Keyword(s):  
Hydrogen Peroxide ◽  
Industrial Effluents ◽  
Carbonaceous Materials
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