Mixed proton—electron conductor

MIXED PROTON/ELECTRONIC CONDUCTORS 8.8.1 Proton Mixed Conductors... 

Li L, Iglesia E. Modeling and analysis of hydrogen permeation in mixed proton-electronic conductors. Chem Eng Sd. 2003 58 1977-88. 

Figure 1.1a shows schematically the operation of a membrane that is permeable to hydrogen molecules (corresponding to a porous membrane or a dense material in which molecules dissolve and diffuse) or to neutral hydrogen atoms (corresponding to a material in which hydrogen dissolves dissociatively, as in a metal). Figure 1.1b shows schematically how a mixed proton-electron conductor performs the same process by so-caUed ambipolar diffusion of both protons and electrons in the same direction to maintain electroneutrality and zero net current. 

Surface Kinetics of Hydrogen Permeation in Mixed Proton-Electron Conductors 21... 

Tab. 2.2 S ummary of transport numbers of various mixed protonic-electronic conductors in various gas concentration cells. 

Fig. 37.1. Principle of an all solid battery with a protonic conductor as electrolyte and two mixed protonic-electronic conductors as electrodes.

Zuo, CJ5., Dorris, S.E., Balachandran, U., and Liu, M.L (2006) Effect of Zr-doping on the chemical stability and hydrogen permeation of the Ni-BaCeo.8Yo.203 a mixed protonic-electronic conductor. Chem. Mater., 18,4647-4650. 

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