Oxygen surface exchange kinetics of erbia-stabilized bismuth oxide

Yoo, Chung-Yul and Boukamp, Bernard A. and Bouwmeester, Henny J.M. (2011) Oxygen surface exchange kinetics of erbia-stabilized bismuth oxide. Journal of Solid State Electrochemistry, 15 (2). pp. 231-236. ISSN 1432-8488

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Abstract:	The surface oxygen exchange kinetics of bismuth oxide stabilized with 25 mol% erbia (BE25) has been studied in the temperature and pO2 ranges 773–1,023 K and 0.1– 0.95 atm, respectively, using pulse-response 18O–16O isotope exchange measurements. The results indicate that BE25 exhibits a comparatively high exchange rate, which is rate determined by the dissociative adsorption of oxygen. Defect chemical considerations and the observed pO2 1=2 dependence of the rate of dissociative oxygen adsorption suggest electron transfer to intermediate superoxide ions as the rate determining step in surface oxygen exchange on BE25
Item Type:	Article
Copyright:	© The authors
Faculty:	Science and Technology (TNW)
Research Group:	Inorganic Membranes (IM) Inorganic Materials Science (IMS)
Link to this item:	http://purl.utwente.nl/publications/76492
Official URL:	http://dx.doi.org/10.1007/s10008-010-1168-8
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