Electrochemical Preparation and Characterization of a Pt � Polytyramine Composite Material with Electrocatalytic Properties

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Tanta Spataru ◽  
Maria Marcu ◽  
Alexandra Banu ◽  
Eugen Roman ◽  
Nicolae Spataru
Keyword(s):  
Cyclic Voltammetry ◽  
Composite Material ◽  
Methanol Oxidation ◽  
Electrochemical Deposition ◽  
Electrocatalytic Activity ◽  
Polymer Coatings ◽  
High Porosity ◽  
Acidic Media ◽  
Electrochemical Preparation

Electrochemical deposition of polytyramine (PTy) was performed by cyclic voltammetry and it was observed that, in acidic media, 20 to 50 consecutive deposition cycles allowed us to obtain polymer coatings with good conductivity and high porosity. The polytyramine layers were used as a matrix for electrochemical deposition of platinum and the electrocatalytic activity for methanol oxidation of the composite material thus obtained was put in evidence.

Mn-Mo-O Catalysts for Methanol Oxidation. I. Preparation and Characterization of the Catalysts

1992 ◽  
Vol 57 (12) ◽  
pp. 2529-2538 ◽  
Author(s):  
Krasimir Ivanov ◽  
Penka Litcheva ◽  
Dimitar Klissurski
Keyword(s):  
Methanol Oxidation ◽  
Solution Concentration ◽  
Alkaline Media ◽  
Acidic Media ◽  
Chemical Methods ◽  
X Ray ◽  
Ph Values ◽  
Precipitate Composition

Mn-Mo-O catalysts with a different Mo/Mn ratio have been prepared by precipitation. The precipitate composition as a function of solution concentration and pH was studied by X-ray, IR, thermal and chemical methods. Formation of manganese molybdates with MnMoO4.1.5H2O, Mn3Mo3O12.2.5H2O, and Mn3Mo4O15.4H2O composition has been supposed. It is concluded that pure MnMoO4 may be obtained in both acid and alkaline media, the pH values depending on the concentration of the initial solutions. The maximum Mo/Mn ratio in the precipitates is 1.33. The formation of pure Mn3Mo4O15.4H2O is possible in weakly acidic media. This process is favoured by increasing the concentration of initial solutions.

Electrochemical Deposition of Pt–RuO x ⋅nH2O Composites on Conductive Diamond and Its Application to Methanol Oxidation in Acidic Media

2015 ◽  
Vol 7 (2) ◽  
pp. 140-148 ◽  
Author(s):  
Tanţa Spătaru ◽  
Loredana Preda ◽  
Petre Osiceanu ◽  
Cornel Munteanu ◽  
Maria Marcu ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Electrochemical Deposition ◽  
Acidic Media

Ultrafine Pt nanoparticle-decorated robust 3D N-doped porous graphene as an enhanced electrocatalyst for methanol oxidation

2016 ◽  
Vol 52 (2) ◽  
pp. 382-385 ◽  
Author(s):  
Yong Qin ◽  
Lei Chao ◽  
Jie Yuan ◽  
Yang Liu ◽  
Fuqiang Chu ◽  
...  
Keyword(s):  
Composite Material ◽  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Pt Nanoparticles ◽  
Average Diameter ◽  
Pt Nanoparticle ◽  
Covalent Bonds ◽  
Long Term Stability ◽  
Doped Graphene

Pt nanoparticles with an average diameter of 3 nm are loaded on a robust 3D N-doped graphene crosslinked with covalent bonds. The resulting composite material exhibits remarkable electrocatalytic activity and long-term stability toward methanol oxidation.

Characterization of Oxygen in WC Catalysts and its Role in Electrocatalytic Activity for Methanol Oxidation

1987 ◽  
Vol 134 (7) ◽  
pp. 1645-1649 ◽  
Author(s):  
Hiroshi Okamoto ◽  
Go Kawamura ◽  
Akira Ishikawa ◽  
Tetsuichi Kudo
Keyword(s):  
Methanol Oxidation ◽  
Electrocatalytic Activity

scholarly journals Prospect of Poly(2-chloroaniline)-Nanocomposite-Silica as Anode in Li-Ion Coin Cell

2021 ◽  
Vol 33 (11) ◽  
pp. 2700-2706
Author(s):  
G. Vani ◽  
S. Jhancy Mary
Keyword(s):  
Cyclic Voltammetry ◽  
Composite Material ◽  
Lithium Ion ◽  
Nyquist Plot ◽  
Cyclic Voltammogram ◽  
Dsc Analysis ◽  
Coin Cell ◽  
Li Ion ◽  
Tga And Dsc

This work evaluates the application of interfacially polymerized poly(2-chloroaniline)-nanocompositesilica (P2ClAni-SiO2), a composite material based on substituted conducting polymer, poly(2-chloroaniline) (P2ClAni) in which silica nanoparticles with varying weight percentages act as fillers. The nanocomposites were characterized by FTIR spectroscopy, XRD, TGA and DSC analysis. The electrochemical characterization of P2ClAni and P2ClAni-SiO2 (10 wt.%) were investigated by cyclic voltammetry, impedance spectroscopy and galvano-static cycling electrochemical measurements. The cyclic voltammogram studies showed broad redox peaks, which correspond to reversibility in transition of leucoemeraldine to emeraldine form of polyaniline. The charge transfer between electrolyte and electrode was represented in the form of Nyquist plot. The galvanostatic cycling test of P2ClAni and P2ClAni-SiO2 showed a discharge capacity of 44.3 mAh g-1 and 69 mAh g-1 for 5 cycles, respectively. P2ClAni-SiO2 composite shows good electrochemical properties and cycling stability compared to P2ClAni. The chlorosubstituted polyaniline with silica demonstrate to be an anode material in lithium ion batteries.

scholarly journals Synthesis and properties of composite material "Mo2C — carbon fiber"

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 159-163
Author(s):  
S. O. Luneva ◽  
◽  
V. S. Dolmatov ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Cyclic Voltammetry ◽  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Electrocatalytic Activity ◽  
Hydrogen Peroxide Solution ◽  
H2o2 Solution ◽  
Low Activity

Molybdenum semicarbide Mo2C was synthesized on carbon fibers Carbopon-B-22 by the method of currentless transfer in molten NaCl-KCl-Na2MoO4-Mo salts. The electrocatalytic activity of the Mo2C/C composite material in a hydrogen peroxide solution has been investigated. It was revealed that this composite material is catalytically inactive in an H2O2 solution. The electrocatalytic activity of composite materials Mo2C/C, TaC/C, NbC/C and uncoated carbon fiber in the decomposition of hydrogen peroxide is compared. The method of cyclic voltammetry confirmed the low activity of Mo2C/C in comparison with other composites.

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