Role of electronic, geometric, and surface properties on the mechanism of the electrochemical hydriding/dehydriding reactions
- Texas A and M Univ., College Station, TX (United States). Texas Engineering Experiment Station; and others
Since 1990 there has been an ongoing collaboration among the authors to investigate the role of individual elements on the thermodynamics and kinetics of hydriding/dehydriding reactions. This review article presents the electrochemical and physicochemical characteristics of hydriding/dehydriding reactions from the point of view of their dependence on electronic, geometric and surface properties of the hydride materials. X-ray absorption spectroscopy (XAS), x-ray diffraction spectroscopy (XRD) and scanning vibrating electrode technique (SVET) studies were based on AB{sub 5} type alloys, partially substituted by other elements. Expansion of the unit cell volume and a larger Ni d band vacancy are beneficial for increasing the amount of the hydrogen storage. XAS and SVET showed that the Ce substitution for La in an AB{sub 5} alloy enhances the lifetime of hydride electrode.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Texas A and M Univ., College Station, TX (United States). Texas Engineering Experiment Station
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Aeronautics and Space Administration, Washington, DC (United States)
- DOE Contract Number:
- FG03-93ER14381; AC02-76CH00016
- OSTI ID:
- 206617
- Report Number(s):
- BNL-62763; CONF-960112-3; ON: DE96006507; CNN: NASA Grant No. NAGW-1194
- Resource Relation:
- Conference: 11. annual battery conference on applications and advances, Long Beach, CA (United States), 9-12 Jan 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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