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Showing 1 to 20 of 42 for “"Anodic Oxidation"”.
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The anodic oxidation of metals
… Optical and electical measurements during the anodic oxidation of nickel have also been made: The results of these measurements indicate that the behavior of passive nickel is more complicated than that of passive iron. Electrical results show that the form of the equation relating the current …
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A study of the anodic oxidation of acetylene on gold electrodes
… was to establish a mechanism for the anodic oxidation of acetylene on gold electrodes in aqueous solutions. It is known that anodic oxidation of organic compounds on gold electrodes produces a large number of organic intermediates and end products. Therefore, it appeared worthwhile to …
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A study of the anodic oxidation of acetylene on platinum-gold alloys
"The anodic oxidation of acetylene on Pt-Au alloys of four compositions (80-20, 60-40, 40-60, and 20-80 Pt-Au) was studied at 80°C in solutions of constant pH and unit normality. Currents were measured as a function of potential and partial pressure of acetylene. The effects of temperature on …
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Application of natural dyes in textile industry and the treatment of dye solutions using electrolytic techniques
Anodic oxidation of a commercial dye, methylene blue (MB), from aqueous solutions using an electrochemical cell is reported. Data are provided on the effects of eight different types of supporting electrolytes, concentration of electrolytes, initial dye concentration, current and electrolytic time …
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In vitro bioactivities of anodised titanium in mixtrue of B-Glycerophosphate and calcium acetate for biomedical application
Anodic oxidation has been widely used to modify the surface properties of titanium in order to improve the biocompatibility after implantation. In this study, high purity titanium foils were exposed in a mixture of β-glycerophosphate disodium salt pentahydrate (β-GP) and calcium acetate monohydrate …
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A Scrutiny of the Anomalous Behavior of Electrolytically Generated Alkyl Radicals: Part I. The Mechanism of The C(beta)-C(gamma) Cleavage of Gamma-Hydroxy Acids During Kolbe Electrolysis. Part Ii. The Anodic Oxidation of Carbon Radicals to Carbonium Ions
Made available in DSpace on 2014-12-05T19:37:09Z (GMT). No. of bitstreams: 1 5904488.pdf: 5800313 bytes, checksum: aaed9a6be9fbbbf160cf13af32294dc1 (MD5) Previous issue date: 1959
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Low-dimensional electron systems fabricated with an atomic force microscope
… an atomic force microscope (AFM) performs local anodic oxidation on the surface of a shallow GaAs/ AlGaAs heterostructure. At cryogenic temperatures the resulting oxide lines define in-plane electrostatic gates of submicron size, and one-dimensional ballistic channels exhibiting quantized …
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Improvement of Homogeneity and Adhesion of Diamond-Like Carbon Films on Copper Substrates
… carbon (DLC) films on copper substrates via anodic oxidation at low temperature. These films are characterized using Raman spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy. Homogeneity of these films is studied using Raman spectroscopy and scanning …
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Investigation of Structure and Properties of Low Temperature Deposited Diamond-Like Carbon Films
… deposited on different substrates based on an anodic oxidation cyclization of acetylene in liquid ammonia. Successfully anodic deposition was carried out for DLC onto nickel substrate at temperatures below -40°C. Comparative studies were performed on a series of different carbon sources …
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Electrochemically-Enabled Late-Stage Peptide C-terminal Modifications
… the chemo- and regio-selectivity of direct anodic oxidation of peptide C-terminal carboxylates, leveraging electrochemically-generated N,O-acetals as valuable handles for divergent late-stage modifications. Chapter One introduces C-terminally modified peptides as promising biochemical …
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Electrochemically-Enabled Late-Stage Peptide C-terminal Modifications
… the chemo- and regio-selectivity of direct anodic oxidation of peptide C-terminal carboxylates, leveraging electrochemically-generated N,O-acetals as valuable handles for divergent late-stage modifications. Chapter One introduces C-terminally modified peptides as promising biochemical …
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ΚΑΤΑΛΥΤΙΚΑ ΚΑΙ ΗΛΕΚΤΡΟΚΑΤΑΛΥΤΙΚΑ ΦΑΙΝΟΜΕΝΑ ΣΕ ΗΛΕΚΤΡΟΧΗΜΙΚΑ ΣΤΟΙΧΕΙΑ ΣΤΕΡΕΟΥ ΗΛΕΚΤΡΟΛΥΤΗ ΥΨΗΛΗΣ ΘΕΡΜΟΚΡΑΣΙΑΣ
THE ANODIC OXIDATION OF CH3OH WAS INVESTIGATED IN SOLID ELECTROLYTE FULL CELLS (1 BAR, 820-970K).CH3OH CAN BE SELECTIVELY OXIDATED TO H2CO WITH SELECTIVITY ONTHE ORDER OF 90% AND ELECTRICAL ENERGY CONGENERATION. IT WAS ALSO FOUND THAT THE CATALYTIC ACTIVITY AND SELECTIVITY OF AG AND PT FOR THE …
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Synthesis and properties of nanoparticulate titanium dioxide compounds
… the preparation of TiO2 nanotubes. Conditions of anodic oxidation were established to reproducibly prepare TiO2 nanotubes of average length 35-50 μm vertically orientated relative to the plain of a pure titanium metal sheet. A non-aqueous solution of ethylene glycol containing small percentage of …
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Investigation of the autocatalytic Cu(II) reduction processes in the systems with natural polyhydroxylic compounds as ligands /
… overpotentials, surface roughness factors, anodic oxidation currents of formaldehyde. A use of ultrasound for electroless copper plating systems change speeds. Depending on the choice of copper plating system and ultrasonic frequency, plating rate can decrease or may increase up to 5 times …
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Electrochemical Transformation of Alkanes, Carbon Dioxide and Protons at Iron-Porphyrins and Iron-Sulfur Clusters
… on (i) chemical and electrochemical alkane oxidation using Fe-porphyrin complexes as catalysts (ii) electrochemical and photoelectrochemical CO2 reduction using Fe-porphyrin complexes (iii) electrochemical and photoelectrochemical generation of hydrogen using iron-sulfur cluster. Chapter 1 …
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Intramolecular Anodic Olefin Coupling Reactions: Synthesis Of Nitrogen- And Oxygen-Heterocycles
Anodic oxidation has been shown to be a powerful method for initiating umpolung reactions that allow the coupling of two nucleophilic functional groups. Most of the work in this area concentrates on making carbon-carbon bond. Hence, the reactions are usually terminated with olefin nucleophiles. The …
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Electroorganic synthesis in microreactors
… separation and purification of products. The anodic oxidation of carboxylic acids produces alkanes by dimerization of the radicals generated at the anode.To investigate this reaction, in a micro reactor environment, several batch cell/flow system arrangements were employed in order to achieve …
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Pretreatment of coal by anodic electrolysis of acidified coal- water slurries
… solvent extractable material was investigated by anodically electrolysing acidified coal-water slurries at potentials around 1.0V SCE. The effects of the pretreatment were examined as functions of coal particle size, acid strength of the slurry, time of electrolysis and applied potential. The coal …
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Corrosion studies on alpha tantalum and beta tantalum coated steel
… acidic conditions, resulting in dissolution and oxidation of Cr. Initially, however, the sputtered Cr coating exhibited improved corrosion resistance over the electrodeposited one, potentially due to its oxide film. The unique properties of tantalum oxide films produced from anodic oxidation and …
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