scholarly journals Synthesis of Refractory Metal Carbides on Carbon Fibers in Molten Salts and Their Electrocatalytic Properties

2021 ◽  
Author(s):  
Vladimir Sergeevich Dolmatov ◽  
Sergey Kuznetsov
Keyword(s):  
Hydrogen Peroxide ◽  
Carbon Fibers ◽  
Refractory Metal ◽  
Molten Salts ◽  
Decomposition Reaction ◽  
Metal Carbides ◽  
Hydrogen Peroxide Decomposition ◽  
Electrocatalytic Properties ◽  
Peroxide Decomposition ◽  
Different Temperatures

Abstract Coatings of TaC and NbC and Mo2C crystals on carbon fibers were obtained by currentless transfer in molten salts. Investigation of electrocatalytic properties of these compositions in the reaction of the hydrogen peroxide decomposition was carried out. It was determined that the hydrogen peroxide decomposition reaction has a zero order for all refractory metal carbides. Using the values of the rate constants at different temperatures the activation energies for the reaction of the hydrogen peroxide decomposition on refractory metal carbides were calculated using the Arrhenius equation. It has been established that coating of NbC on carbon fibers has a higher electrocatalytical properties in comparison with other carbides. The electrocatalytic properties of NbC/C, TaC/C and Mo2C/C composites were studied also by cyclic voltammetry.

Synthesis of Refractory Metal Carbides on Carbon Fibers in Molten Salts and Their Electrochemical and Electrocatalytic Properties

2020 ◽  
Vol MA2020-02 (59) ◽  
pp. 2930-2930
Author(s):  
Dmitriy Miklashov ◽  
Svetlana Luneva ◽  
Vladimir Dolmatov ◽  
Sergey Kuznetsov
Keyword(s):  
Carbon Fibers ◽  
Refractory Metal ◽  
Molten Salts ◽  
Metal Carbides ◽  
Electrocatalytic Properties

Synthesis of Refractory Metal Carbides on Carbon Fibers in Molten Salts and Their Electrochemical and Electrocatalytic Properties

2020 ◽  
Vol 98 (10) ◽  
pp. 263-270
Author(s):  
Dmitriy Miklashov ◽  
Svetlana Luneva ◽  
Vladimir Dolmatov ◽  
Sergey Kuznetsov
Keyword(s):  
Carbon Fibers ◽  
Refractory Metal ◽  
Molten Salts ◽  
Metal Carbides ◽  
Electrocatalytic Properties

Reply to the ‘Comment on “Theoretical investigations on hydrogen peroxide decomposition in aquo”’ by W. H. Koppenol, Phys. Chem. Chem. Phys., 2021, 23, DOI: 10.1039/D1CP03545B

2021 ◽  
Author(s):  
Takao Tsuneda ◽  
Tetsuya Taketsugu
Keyword(s):  
Hydrogen Peroxide ◽  
Decomposition Reaction ◽  
Chem Phys ◽  
Simple Test ◽  
Ion Hydration ◽  
Hydrogen Peroxide Decomposition ◽  
Gibbs Energies ◽  
Peroxide Decomposition ◽  
Theoretical Investigations ◽  
Phys Chem Chem Phys

The H2O2 decomposition reaction mechanism based on the production of a de facto Fe+ ion hydration complex is strongly supported by a simple test based on the Gibbs energies considering the O–O bond dissociation of H2O2.

O-O bond activation with cobalt(II)-ethylenediamine complexes in ion-exchange resins

1980 ◽  
Vol 45 (6) ◽  
pp. 1780-1784 ◽  
Author(s):  
Atanas Andreev ◽  
Lachezar Prahov ◽  
Dimitar Shopov
Keyword(s):  
Ion Exchange ◽  
Bond Activation ◽  
Catalytic Properties ◽  
Decomposition Reaction ◽  
Ion Exchange Resins ◽  
Hydrogen Peroxide Decomposition ◽  
Surface Complexes ◽  
Peroxide Decomposition ◽  
Epr Parameters ◽  
Exchange Resins

The formation of Oxygen paramagnetic adducts of Co(II) containing ion-exchange resins in the presence of adsorbed ethylenediamine has been found. The EPR parameters of a complex of the type Co(III) (en)2O-2 and of O-2 species formed in the presence of Co(en)2+3 have been described. The catalytic properties of Co-ethylenediamine surface complexes with respect to the hydrogen peroxide decomposition reaction have been investigated and a probable mechanism has been suggested.

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