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|Title: ||Effect of oxidative heat-treatment on electrochemical properties and oxygen reduction reaction (ORR) activity of Pd-Co alloy catalysts|
|Authors: ||RAHUL, R|
Pd oxide-based catalysts
|Issue Date: ||2014|
|Publisher: ||ELSEVIER SCIENCE SA|
|Citation: ||JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 712223-229|
|Abstract: ||Pd-Co catalysts of various compositions are subjected to heat-treatment in an oxygen-containing atmosphere (5% oxygen and 95% argon by volume) and the catalysts are found to form oxides. On exposure to electrochemical conditions, the oxides get reduced in the potential range of 0.05-0.4 V of the voltammogram and the voltammetric features of the heat-treated catalyst are comparable to that of the corresponding as-prepared catalyst of same composition. The trends in electrochemical surface area (ESA), current due to formation of adsorbed-oxygenated species and activity towards oxygen reduction reaction (ORR) with catalyst composition are similar and they are in the order of Pd << Pd1.5Co < PdCo < Pd6.3Co < Pd2Co < Pd3Co. The ORR activity of the catalyst subjected to the oxidative thermal treatment is higher than that of Pd and the corresponding as-prepared catalyst of same composition. (C) 2013 Elsevier B.V. All rights reserved.|
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