Electrochemical adsorption-desorption of hydrogen on amorphous Ni[sub 40]Nb[sub 60] in alkaline media
- McGill Univ., Montreal, Quebec (Canada). Dept. of Physics
New interest has arisen in the last decade in the formation and properties of metal hydrides, particularly with respect to their applications as rechargeable hydride anodes in high energy density batteries. The electrochemical adsorption-desorption of hydrogen on amorphous Ni[sub 40]Nb[sub 60] is strongly alkaline media was investigated by cyclic voltammetry and chronopotentiometry. After cathodic polarization, the voltammogram in the [minus]1.0 to [minus]0.6 V range (vs Hg/HgO) show a new cathodic wave (C) and two anodic waves (A[prime] and B[prime]), due, respectively, to adsorption and desorption of H atoms at the surface of the alloy. The dependence of these waves on the sweep range and sweep potential is presented and discussed. The overpotential dependence on time at constant anodic current presents two plateaus, corresponding to the discharge of the two types of species on the surface of the alloy.
- OSTI ID:
- 6911224
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:9; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ADSORPTION
ALLOYS
CHEMISTRY
DATA
DESORPTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN
HYDROGEN STORAGE
INFORMATION
INTERMETALLIC COMPOUNDS
NICKEL ALLOYS
NIOBIUM ALLOYS
NONMETALS
NUMERICAL DATA
PH VALUE
POTENTIOMETRY
SORPTION
SORPTIVE PROPERTIES
STORAGE
SURFACE PROPERTIES
TITRATION
VOLTAMETRY