Surface science approach of MnO-CeOx(111) mixed oxide

Elfrida Ginting

Abstract


Ceria has unique abilities that makes it possible to be used as catalyst supports. The abilities of ceria are to store and release oxygen and easy transformation of Ce+4 to Ce+3 and vice versa Ceria as a catalyst support, showed a disadvantage over high temperature. The purpose of the paper is finding the right recipe for growing Mn-ceria mixed oxide. STM, XPS and LEED were used to acquire fundamental information. LEED experiments from Mn doped ceria mixed oxide specified that the films is well ordered. The LEED results is showing six spots that indicated the well ordered film and follow the (111) plane. Furthermore, for Mn doped ceria mixed oxide, there is no disctinct difference between higher stoichiometry and lower stoichiometry mixed oxide. But between higher and lower percentage of Mn, it has different structure. The triangle islands from higher Mn mixed oxide is MnO follow (111) plane. For both lower and higher Mn, oxygen vacancies can be recognized in reduced films.


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DOI: https://doi.org/10.24114/jmns.v1i1.28466

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