Protonic conductivity in hydrates |
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| Institution: | 1. School of Chemical and Process Engineering, University of Leeds, UK;2. School of Chemical Engineering, The University of Queensland, Brisbane, Qld, 4072, Australia;3. NNL Workington Laboratory, Cumbria, UK;4. Sellafield Limited Analytical Services, Sellafield, Cumbria, UK;5. NNL Central Laboratory, Sellafield, Cumbria, UK;1. Department of Physics, College of Science, Mustansiriyah University, Baghdad, Iraq;2. Immanuel Kant Baltic Federal University, Kaliningrad, Russian Federation |
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| Abstract: | The protonic conductivity of three acid hydrates, HUO2PO4·4H2O, Ce(HPO4)2·nH2O,V2O5·nH2O has been studied as a function of the partial pressure of water. The evolution of their conductivity is related to experimental water adsorption isotherms and to the theoretical Brunauer adsorption isotherms. Conclusions can then be drawn about the origin of the conductivity (bulk-type or surface conductivity) and about the type of water molecules involved in the protonic diffusion process. These three compounds are each representative of a different class of protonic conductors, the lattice hydrates, the particle hydrates, and the swelling hydrates respectively. |
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