Comparative Study on Electrochemical Oxidation of Sodium Borohydride on Carbon Supported PtSn and Pt

2011 ◽  
Keyword(s):  
Comparative Study ◽  
Electrochemical Oxidation ◽  
Sodium Borohydride

scholarly journals Comparative Study of Ag Nanostructures: Molecular Simulations, Electrochemical Behavior, and Antibacterial Effect

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Álvaro de Jesús Ruíz-Baltazar ◽  
Simón Yobanny Reyes-López ◽  
D. Larrañaga ◽  
R. Pérez
Keyword(s):  
Cyclic Voltammetry ◽  
Ethylene Glycol ◽  
Comparative Study ◽  
Sodium Borohydride ◽  
Electrochemical Behavior ◽  
Antibacterial Effect ◽  
Chemical Reduction ◽  
Molecular Simulations ◽  
The Other ◽  
E Coli

Nanoparticles of Ag with different sizes and structures were obtained and studied. Two methods for reductions of Ag ions were employed, chemical reduction by sodium borohydride and ethylene glycol. Cuboctahedral and icosahedral structures were obtained. Molecular simulations were carried out in order to evaluate the reactivity of both structures. On the other hand, the electrochemical activity and antibacterial effect (E. coli) of the cuboctahedral and icosahedral structures were measured experimentally. The results obtained by molecular simulation, cyclic voltammetry, and antibacterial effect were compared and discussed in this work.

scholarly journals The First Stages of Chemical and Electrochemical Aniline Oxidation—Spectroscopic Comparative Study

2020 ◽  
Vol 10 (6) ◽  
pp. 2091 ◽  
Author(s):  
Zuzana Morávková ◽  
Ivana Šeděnková ◽  
Patrycja Bober
Keyword(s):  
Comparative Study ◽  
Electrochemical Oxidation ◽  
Film Formation ◽  
Pani Film ◽  
Redox Behavior ◽  
Reaction Conditions ◽  
Chemical Polymerization ◽  
Polyaniline Film ◽  
Aniline Oxidation ◽  
Aniline Oligomers

There are several types of aniline oligomers that can be formed in the early stages of aniline oxidation: linear oligomers with repeating units joined in para positions, and various branched and polycyclic oligomers, being the two most important groups. The fraction of these different oligomeric groups depends upon the reaction conditions of aniline oxidation. The aim of this study was to analyze the first products of the chemical and electrochemical oxidation of aniline at the (starting) pH 1 and 7, in order to specify the conditions of the formation of phenazine-like oligomers, and to test the theory that they have an important role in polyaniline film formation. We have confirmed that phenazine-like oligomers do not form at pH 1, neither in the chemical nor the electrochemical oxidation of aniline; however, they form in both chemical and electrochemical oxidation of aniline at pH 7. Phenazine-like oligomers are thus definitely not necessary intermediates for PANI film formation, not even in the chemical polymerization of aniline. Finally, the redox behavior of phenazine-like oligomers was demonstrated in a medium at pH 1.

scholarly journals A comparative study of the electrochemical oxidation of the herbicide tebuthiuron using boron-doped diamond electrodes

Chemosphere ◽  
2012 ◽  
Vol 88 (2) ◽  
pp. 155-160 ◽  
Author(s):  
S.A. Alves ◽  
T.C.R. Ferreira ◽  
N.S. Sabatini ◽  
A.C.A. Trientini ◽  
F.L. Migliorini ◽  
...  
Keyword(s):  
Comparative Study ◽  
Electrochemical Oxidation ◽  
Diamond Electrodes ◽  
Boron Doped Diamond ◽  
Boron Doped

scholarly journals Investigation of sodium borohydride and hydrazine oxidation on gold nanoparticles modified zinc–cobalt coating

Chemija ◽  
2019 ◽  
Vol 30 (3) ◽  
Author(s):  
Aušrinė Zabielaitė ◽  
Aldona Balčiūnaitė ◽  
Dijana Šimkūnaitė ◽  
Jūratė Vaičiūnienė ◽  
Algirdas Selskis ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Sodium Borohydride ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Titanium Substrate ◽  
Optical Emission ◽  
Alkaline Solutions ◽  
Inductively Coupled ◽  
Cobalt Coating

This work presents the investigation of the electrochemical oxidation of hydrazine and sodium borohydride ions in alkaline solutions on the Au nanoparticles modified ZnCo coating surface, which was deposited on the titanium substrate (termed as AuZnCo/Ti). The AuZnCo/Ti catalysts were prepared via a facile electrochemical deposition technique followed by a simple and low-cost galvanic displacement. Scanning electron microscopy, energy dispersive X-ray analysis and inductively coupled plasma optical emission spectroscopy were used for characterization of the prepared catalysts surface morphology, structure and composition, whereas their electrocatalytic behaviour was investigated for the electrochemical oxidation of hydrazine and sodium borohydride in an alkaline medium using cyclic voltammetry. It has been determined that the AuZnCo/Ti catalysts with Au loadings of 31, 63 and 306 µg cm–2 show enhanced catalytic activity towards the electrochemical oxidation of both hydrazine and sodium borohydride as compared to that of the ZnCo/Ti catalyst.

THE INVESTIGATION OF THE ELECTROOXIDATION OF SODIUM BOROHYDRIDE ON VARIOUS METAL ELECTRODES IN AQUEOUS BASIC SOLUTIONS

2018 ◽  
pp. 80-86
Author(s):  
H. Celikkan ◽  
M. Sahin ◽  
M. L. Aksu ◽  
T. N. Veziroğlu
Keyword(s):  
Catalytic Activity ◽  
Electrochemical Oxidation ◽  
Sodium Borohydride ◽  
Electrode Surface ◽  
Square Wave Voltammetry ◽  
Metal Electrodes ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Basic Solutions ◽  
Electron Transfers

This study is related to the electrochemical oxidation of NaBH4 on Au, Pt, Pd and Ni electrodes by the use of cyclic and square wave voltammetry. The most effective metal for the oxidation of sodium borohydride was found to be Au. Pt and Pd electrodes also showed certain activity while Ni was not effective. The compound was observed to give two consecutive oxidation steps with 6 and 2 electron transfers. The experiments conducted while keeping the potential at −0.8V showed that the resulting compound is adsorbed upon the electrode surface and gradually decrease its catalytic activity.

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