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Our team has discovered a unique coupling mechanism involving mixed conduction of protons, oxygen vacancies, and electronic defects in specific materials used for gas permeation. This phenomenon allows for the simultaneous transport and separation of gases like oxygen, hydrogen, and steam. Remarkably, these materials can even facilitate the uphill diffusion of these species against their concentration gradients. This discovery opens new avenues for the use of such materials in advanced applications, including membrane reactors for efficient chemical processing.
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Our team has discovered an unusual multi-species defect-transport coupling process occurring in these materials when employed in gas permeation applications. Simultaneous mixed conduction of protons (OHO•), oxygen vacancies (V••), and electronic defects (electrons or holes) enables the separation of oxygen, hydrogen or steam and, remarkably, can even force any one of these species to be transported against its concentration gradient (uphill diffusion). We believe that these materials can be used to great advantage in applications such as membrane reactors for chemical processing. Novel Transport Mechanisms in Conducting CeramicsCraig P. Taylor, Colorado School of Mines, DMR 0820518
