Electrochemical Reduction Of Oxygen On Quinone Modified Carbon Electrodes And On Thin Films Of Platinum And Gold
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Electrochemical Reduction Of Oxygen On Quinone Modified Carbon Electrodes And On Thin Films Of Platinum And Gold
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Author : Ave Sarapuu
language : en
Publisher:
Release Date : 2008
Electrochemical Reduction Of Oxygen On Quinone Modified Carbon Electrodes And On Thin Films Of Platinum And Gold written by Ave Sarapuu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Electrodes, Carbon categories.
Electrochemical Reduction Of Oxygen On Quinone Modifeid Carbon Electrodes And On Thin Films Of Platinum And Gold
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Author :
language : en
Publisher:
Release Date : 2008
Electrochemical Reduction Of Oxygen On Quinone Modifeid Carbon Electrodes And On Thin Films Of Platinum And Gold written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Electrodes, Carbon categories.
Investigation Of Nanoceria Modified Platinum Gold Composite Electrodes For The Electrochemical Reduction Of Oxygen In Alkaline Media
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Author : Rahul Hegishte
language : en
Publisher:
Release Date : 2011
Investigation Of Nanoceria Modified Platinum Gold Composite Electrodes For The Electrochemical Reduction Of Oxygen In Alkaline Media written by Rahul Hegishte and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Catalysis categories.
Platinum-gold and nanoceria-modified platinum-gold electrodes were prepared on a platinum surface via electrochemical reduction of solutions of platinum and gold salts in the dispersion of nanoceria. The molar ratios of Pt and Au were varied in both PtAu and PtAu/CeO2 electrodes while the total concentration of the metals was maintained at 2 x 10−3M and the concentration of nanoceria was maintained constant at 5 x 10−3M. The electrodes were characterized by their cyclic voltammetry curves in 0.5M sulfuric acid solution. The electrochemically active area of the electrodes was determined using the copper underpotential deposition method. The linear sweep voltammograms of the PtAu and PtAu/CeO2 electrodes were plotted from -1V to 0V vs. Ag/AgCl, 3M KCl reference electrode using the rotating disk electrodes for the rotation speeds from 200 to 3600rpm in an oxygen saturated 0.1M sodium hydroxide solution. The values of the kinetic controlled current density were determined from the rotating disk voltammetry. The values of the limiting current density for each rotation speed were used to plot the Koutecky-Levich plots for the electrodes. The rate constants were obtained from the Koutecky-Levich plots for each composition of the electrode. The values of kinetic current density and the rate constants indicated that the addition of Au enhances the ORR rates in both the PtAu and the PtAu/CeO2 electrodes. The values of the kinetic current densities of the PtAu/CeO2 were lower than that of the PtAu electrodes owing to the poor electrical conductivity of ceria. The Koutecky-Levich plots for the PtAu and the PtAu/CeO2 electrodes are linear for the four-electron reduction of oxygen in the alkaline media, which indicates that the overall reaction follows the first order kinetics. The electron transfer rate constants obtained from the Koutecky-Levich plots for the PtAu and the PtAu/CeO2 electrodes both were found to increase in values with the addition of Au. The Tafel plots were plotted for the PtAu and PtAu/CeO2 electrodes and the values of Tafel slopes were found to be in a small range for lower amounts of Au which indicated that the ORR rates were enhanced in lower amounts of Au. The values of Tafel slopes were found to be much higher for the ceria-modified PtAu electrodes as compared to the PtAu electrodes, which indicate the lower rates of ORR after the modification with ceria. Also, the ORR rates for the electrodes with smaller amounts of Au in PtAu/CeO2 were higher than those in the larger amounts of Au.
Oxygen Electroreduction On Thin Platinum Films And The Electrochemical Detection Of Superoxide Anion
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Author : Kaido Tammeveski
language : en
Publisher:
Release Date : 1998
Oxygen Electroreduction On Thin Platinum Films And The Electrochemical Detection Of Superoxide Anion written by Kaido Tammeveski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Electrochemistry categories.
Alloying Effects Of Co Sputtered Gold Platinum Thin Films On The Oxygen Reduction Reaction In Acidic Electrolyte
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Author : Billyde Brown
language : en
Publisher:
Release Date : 2007
Alloying Effects Of Co Sputtered Gold Platinum Thin Films On The Oxygen Reduction Reaction In Acidic Electrolyte written by Billyde Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Electrocatalysis categories.
A Study Of The Electrochemical Reduction Of Oxygen In Alkaline Solution On A Teflon Bonded Platinum Electrode
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Author : Charles D. Kramer
language : en
Publisher:
Release Date : 1977
A Study Of The Electrochemical Reduction Of Oxygen In Alkaline Solution On A Teflon Bonded Platinum Electrode written by Charles D. Kramer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
Electrochemical Oxygen Reduction
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Author : Pei Kang Shen
language : en
Publisher: Springer
Release Date : 2021-02-17
Electrochemical Oxygen Reduction written by Pei Kang Shen and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-02-17 with Science categories.
This book discusses systematically the theoretical research and the applications of electrochemical oxygen reduction. Oxygen reduction reaction is a common issue in electrochemistry, but is also an important process involved in the field of energy, cryogenic fuel cells, metal–air cells, oxygen sensors and hydrogen peroxide preparation. This book is divided into 6 chapters; it starts with a description of dynamic mechanisms, followed by a detailed introduction on the related experimental methods and related catalyst preparation technology. By providing the basic methods and testing techniques, and by demonstrating their applications, it helps readers gain a better understanding of oxygen reduction reactions, making it a valuable resource for the industrialization of scientific research achievements. Accordingly, the book appeals to a broad readership, particularly graduate students, those working at universities and research organizations, and industrial researchers.
Electrocatalysis Of Oxygen Using Water Soluble Metal Porphyrins And Chemically Modified Porphyrin Electrodes
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Author : T. Kuwana
language : en
Publisher:
Release Date : 1983
Electrocatalysis Of Oxygen Using Water Soluble Metal Porphyrins And Chemically Modified Porphyrin Electrodes written by T. Kuwana and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.
Primary effort was devoted to the study of oxygen reduction using wateroluble iron and cobalt porphyrins, namely, iron and cobalt tetrakis (N-methyl-4-pyridyl)porphyrin. These porphyrins with the metal in the +3 oxidation state can be electrochemically reduced to the divalent state which can then reacted with oxygen. In the case of the iron containing porphyrin, oxygen was reduced at a bimolecular rate of ca. 1 x 10 to the minus 7th power 1/m/s to hydrogen perioxide which was then reduced rapidly to water. A mechanistic scheme was postulated for the reduction and using experimentally determined parameters, current-potential curves were simulated. Good agreement between the experimental and computer calculated current-potential curves supported the proposed scheme. Cross-correlation between optical, electrochemical and magnetic circular dichroism results have provided axial ligation, dimerization and spin state information of the ferric and ferrous tetrakis (n-methyl-4-pyridyl)porphyrins. Glassy or graphitic carbon electrodes were rendered catalytic by the incorporation of iron porphyrin derivatives infinity e.g. iron tetra-(o-amino-phenyl)porphyrin and iron tetra-(N(2-hydroxyethyl)pyridyl)porphyrin summation in thin polymeric films adhering to the carbon. The extent of oxygen reduction to hydrogen peroxide and water depended on the amount of iron porphyin.
The Formation And Activity Of Platinum Adlayers On Diamond Electrodes For Electrocatalysis
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Author : Jason Alan Bennett
language : en
Publisher:
Release Date : 2006
The Formation And Activity Of Platinum Adlayers On Diamond Electrodes For Electrocatalysis written by Jason Alan Bennett and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Catalysis categories.
Conference Papers Index
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Author :
language : en
Publisher:
Release Date : 1988
Conference Papers Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Electronic journals categories.
Monthly. Papers presented at recent meeting held all over the world by scientific, technical, engineering and medical groups. Sources are meeting programs and abstract publications, as well as questionnaires. Arranged under 17 subject sections, 7 of direct interest to the life scientist. Full programs of meetings listed under sections. Entry gives citation number, paper title, name, mailing address, and any ordering number assigned. Quarterly and annual indexes to subjects, authors, and programs (not available in monthly issues).