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Dual mechanism of hydrogen desorption from palladium alloys postulated on the basis of cyclic voltammetric studies

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Abstract

The process of hydrogen absorption/desorption in Pd-Pt and Pd-Pt-Rh alloys has been investigated using cyclic voltammetry. Hydrogen absorbed at constant potential was electrooxidized at various scan rates. The charge of hydrogen oxidation has been found to be dependent on the scan rate. The decrease in the oxidation charge observed for low scan rates indicates that, under these conditions, some amount of hydrogen may be removed via a non-electrochemical recombination reaction. The results suggest that the dual mechanism of hydrogen desorption, involving electrochemical oxidation and non-electrochemical recombination, confirmed for pure palladium, is valid also for palladium alloys.

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Acknowledgements

This work was financially supported by the Polish State Committee for Scientific Research (KBN) Grant No. 3T09A 003 19.

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Authors and Affiliations

  1. Department of Chemistry, Warsaw University, Pasteura 1, 02-093 , Warsaw, Poland

    A. Czerwiński, M. Grdeń & M. Łukaszewski

  2. Industrial Chemistry Research Institute, Rydygiera 8, 01-793 , Warsaw, Poland

    A. Czerwiński & M. Łukaszewski

Authors
  1. A. Czerwiński
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  2. M. Grdeń
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  3. M. Łukaszewski
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Correspondence to A. Czerwiński.

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Dedicated to the memory of Harry B. Mark, Jr. (February 28, 1934–March 3rd, 2003)

Contribution to the 3rd Baltic Conference on Electrochemistry, GDAŃSK-SOBIESZEWO, 23–26 APRIL 2003.

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Czerwiński, A., Grdeń, M. & Łukaszewski, M. Dual mechanism of hydrogen desorption from palladium alloys postulated on the basis of cyclic voltammetric studies. J Solid State Electrochem 8, 411–415 (2004). https://doi.org/10.1007/s10008-003-0448-y

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