Understanding Practical Catalysts Using a Surface Science Approach: The Importance of Strong Interaction between BaO and Al2O3 in NOx Storage Materials | Zendy

Cheol-Woo Yi | Zendy; Ja Hun Kwak | Zendy; Charles H. F. Peden | Zendy; Chongmin Wang | Zendy; János Szanyi | Zendy

Open Access

Understanding Practical Catalysts Using a Surface Science Approach: The Importance of Strong Interaction between BaO and Al₂O₃ in NO_x Storage Materials

Author(s) -

Cheol-Woo Yi,

Ja Hun Kwak,

Charles H. F. Peden,

Chongmin Wang,

János Szanyi

Publication year - 2007

Publication title -

the journal of physical chemistry c

Language(s) - English

Resource type - Journals

eISSN - 1932-7455

pISSN - 1932-7447

DOI - 10.1021/jp0763376

Subject(s) - nial , aluminate , ion , nox , surface (topology) , catalysis , phase (matter) , materials science , chemistry , inorganic chemistry , metallurgy , mathematics , intermetallic , organic chemistry , geometry , alloy , cement , combustion

The interaction of NO2 with BaO/Al2O3/NiAl(110) model NOx storage materials was investigated at BaO coverages corresponding, to practical systems. The results obtained from these model systems show excellent correlation with those of practical systems. We found a specific, strong interaction between BaO and Al2O3, and this interaction profoundly influences the NOx, chemistry. BaO readily forms a Ba-aluminate-like surface phase, and upon the interaction with NOx, Ba ions are pulled out from this surface layer to form Ba(NO3)(2) clustersclose313

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