Coulometric assay of deuterium loading levels in palladium electrodes. Technical report

Technical Report · Thu Dec 06 00:00:00 EST 1990

OSTI ID:5972232

Lawson, D R; Tierney, M J; Cheng, I F; Van Dyke, L S; Espenscheid, M W

We report in this paper measurements of hydrogen (H) and deuterium (D) loading stoichiometries in Pd electrodes. We accomplished these analyses using an electrochemical method developed for in situ determination of palladium deuteride stoichiometries. The electrochemical method quantifies the amount of deuterium incorporated into the metal lattice by collecting the charge released during the potential controlled discharge of deuterium loaded Pd electrodes. In addition, ex situ gravimetric analyses were used to confirm electrochemically measured D/Pd atom ratios. Gravimetric analyses were also used in cases where the diameter of the Pd electrode precluded the relatively slow diffusion-limited electrochemical discharge method. A variety of electrolytic factors were studied to determine what conditions, if any, promote the greatest absorption of deuterium into the Pd lattice. We observed loading values of 0.73 + or - 0.02 deuterium atoms per Pd lattice atom under all the electrolytic conditions studied in LiOD and D2SO4 solutions. As found in previous studies, H/Pd values were approximately 10% higher than D/Pd values.

• Research Organization: Colorado State Univ., Fort Collins, CO (USA). Dept. of Chemistry
• OSTI ID: 5972232
• Report Number(s): AD-A-229759/6/XAB; TR-56; CNN: N00014-82-K-0612
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DEUTERIUM
ABSORPTION
HYDROGEN
PALLADIUM
SORPTIVE PROPERTIES
ATOMS
CONTROL
DEUTERIUM COMPOUNDS
DIFFUSION
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYSIS
GRAVIMETRIC ANALYSIS
ISOTOPE SEPARATION
LITHIUM HYDROXIDES
LOADING RATE
MEASURING METHODS
PAPER
PROGRESS REPORT
STOICHIOMETRY
SULFURIC ACID
UNLOADING
ALKALI METAL COMPOUNDS
CHEMICAL ANALYSIS
CHEMISTRY
DOCUMENT TYPES
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXIDES
INORGANIC ACIDS
ISOTOPES
LIGHT NUCLEI
LITHIUM COMPOUNDS
LYSIS
METALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
PLATINUM METALS
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
STABLE ISOTOPES
SURFACE PROPERTIES
TRANSITION ELEMENTS
400202* - Isotope Effects
Isotope Exchange
& Isotope Separation