Hydride ion as a two-electron donor in a nanoporous crystalline semiconductor 12CaO.7Al(sub 2)O(sub 3)
Article Abstract:
The 12CaO.7Al(sub 2)O(sub 3) (C12A7) crystal with a nanoporous lattice framework exhibits high electrical conductivity with activation energy of approximately 1.5 eV when equilibrated in a hydrogen atmosphere above approximately 800 degree Celsius. The study reveals that the H(super -)ion in C12A7 acts as a two-electron donor through conversion of H(super -) to H(super +).
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Formation of oxygen radicals in 12CaO.7Al2O3: Instability of extraframework oxide ions and uptake of oxygen gas
Article Abstract:
The examination of thermodynamics and kinetics of oxygen radical formation in cages of a nanoporous crystal, 12CaO.7Al2O3 is done during isothermal annealing in a dry oxygen atmosphere. Evaluating the radical formation enthalpy and entropy helps to determine the temperature and oxygen partial pressure dependences of equilibrium oxygen radical concentration.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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Thermodynamics and kinetics of hydroxide ion formation in 12CaO.7Al2O3
Article Abstract:
The thermodynamics and kinetics of hydroxide (OH-) ionas that formed in cages of 12CaCo/7Al2O3 (C12A7) with nanoporous structures is examined. Diffusion coefficients of species relevant to the hydration process are determined and it is demonstrated that inward diffusion of OH- ions is the rate-determining process.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
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