Park, Se Min Park, Ji Won Ha, Heon-Phil Han, Hyun-Sik Seo, Gon 2024-01-21T00:34:18Z 2024-01-21T00:34:18Z 2021-09-02 2007-08-01 1381-1169 https://pubs.kist.re.kr/handle/201004/134211 Barium oxide-based NO, storage and reduction (NSR) catalysts with different amounts of potassium oxide were prepared to investigate the role of potassium oxide in the aspects of amount and strength of NO2 storage. The dispersion of barium and potassium oxides on alumina, the amount and state of NO2 stored on them, and the desorption profiles of NO2 from them were examined by XRD, N-2 adsorption, electrical conductivity measurement, XPS, Fr-IR and TPD techniques. Barium and potassium oxides were mainly loaded in the mesopores of the alumina and the NO2 was stored by being converted to nitrates. The alumina itself had a small capacity for NO2 storage, but the impregnation with potassium oxide increased the capacity. The co-loading of potassium oxide and barium oxide enhances the strength of the interaction between the storage material and NO2, shifting the desorption peak of NO2 to a elevated temperature. (C) 2007 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV FT-IR ADSORPTION BAO/AL2O3 BEHAVIOR Storage of NO2 on potassium oxide co-loaded with barium oxide for NOx storage and reduction (NSR) catalysts Article 10.1016/j.molcata.2007.03.067 1 JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v.273, no.1-2, pp.64 - 72 JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 273 1-2 64 72 scie scopus 000248178000010 2-s2.0-34250889529 Chemistry, Physical Chemistry Article FT-IR ADSORPTION BAO/AL2O3 BEHAVIOR potassium oxide barium oxide NO2 NSR catalyst storage