Oxygen surface exchange kinetics of erbia-stabilized bismuth oxide

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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
Additional information:Open access article
Copyright:© The authors
Faculty:
Science and Technology (TNW)
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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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