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- W4249733503 abstract "The influence of underpotential Pb and Tl adsorbates on the electrochemical reduction of oxygen on rotating-disc Ag(111), (100), and (110) single-crystal surfaces has been studied in aerated 0.5 M HClO4 solutions at various concentrations of Cl−. On the bare silver substrates oxygen is reduced completely to H2O. Depending on the degree of coverage and the structural arrangements of Pb and Tl adsorbates on the different crystal planes, a partial inhibition of the oxygen reduction is obtained predominatly leading to the formation of the stable intermediate, H2O2. In the presence of Cl− ions in solution, the overvoltage for charge-transfer controlled oxygen reduction increases according to (∂E/∂ logcCl−)i_=−60 mV, due to a specific adsorption of chloride on the silver substrate. In 0.5 M HCl solutions a stimulating effect on the oxygen reduction induced by the underpotential deposition of Pb has been found, which can be interpreted in terms of a competitive adsorption-desorption mechanism involving a replacement of chloride by lead." @default.
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- W4249733503 date "1981-02-25" @default.
- W4249733503 modified "2023-09-30" @default.
- W4249733503 title "The electrocatalytical influence of underpotential lead and thallium adsorbates on the cathodic reduction of oxygen on (111), (100) and (110) silver single-crystal surfaces" @default.
- W4249733503 doi "https://doi.org/10.1016/0368-1874(81)87051-7" @default.
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