Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 15, Issue 11-12, Pages 2489-2522Publisher
SPRINGER
DOI: 10.1007/s10008-011-1506-5
Keywords
Palladium; Palladium alloys; Hydrogen absorption; Limited volume electrodes (LVEs); Thin layers
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The review summarizes selected aspects of the electrochemical investigations on hydrogen absorption in palladium and its alloys prepared as thin layers deposited on a conductive substrate. These kinds of electrodes are named limited volume electrodes (LVEs). We demonstrate that LVE methodology creates new possibilities for electrochemical studies on hydrogen-absorbing materials. In this paper, we describe the procedures of preparation and characterization of Pd-based LVEs and give a survey of the investigations on hydrogen electrosorption performed with the use of LVEs. We discuss the influence of such factors as electrode potential, temperature, electrolyte composition, electrode thickness, and other experimental conditions on the process of hydrogen and deuterium absorption in Pd LVEs. The results concerning Pd alloys are thoroughly reviewed. The studies on thermodynamics, kinetics, and mechanism of hydrogen electrosorption in Pd and its alloys are also summarized. Attention is paid to the examination of the interrelation between hydrogen absorption and other electrochemical processes taking place on LVEs. Finally, possible applications of the LVE methodology in the context of electrochemical power sources are mentioned.
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