Catalytically Accelerated SOLID-GAS Reaction Between no and Ba-Cu-O for Efficient no Removal

Intercalation of nitric oxide into double-layered cuprate superstructure

“…Mixed oxides containing Ba and Cu are well known to be reactive to nitric oxides. [4][5][6][7] As in previous reports by Machida et al,4.5 for instance, Ba-Cu-0 mixed oxides react readily with gaseous NO, but in that case the solid-gas reaction produces barium nitrate or nitrite, which were not observed in the present system. The solid-gas reaction between NO and the double-layered cuprate is characterized by the absence of such a second phase precipitation.…”

MnOx−CeO2 Binary Oxides for Catalytic NOx Sorption at Low Temperatures. Sorptive Removal of NOx

“…The resultant reactivity to NO in the presence of O 2 brings about considerable solid−gas reactions to produce nitrate precipitations. Reported NO x sorbing materials based on this concept include Ba−Y−Cu−O, − Ba−Cu−O, , La−Ba−Sr−Cu−O, − Ba−Al 2 O 3 , and so on. However, the problem in these systems is strong inhibition caused by coexisting CO 2 because CO 2 and NO x are competing for the alkaline site on the solid surface .…”

NO Intercalation Properties of Double-Layered Cuprate, La2-xBaxSrCu2O6. Effect of Treatment with Water Vapor

“…The NO absorption brought about significant expansion of the interlayer spacing of the cuprate without precipitation of other phases . This is in complete contrast to other Ba-containing cuprates, such as the Ba−Y−Cu−O or Ba−Cu−O systems, which absorb gaseous NO via solid-gas reactions to produce Ba(NO 2 ) 2 and/or Ba(NO 3 ) 2 . − More interestingly, part of the NO molecules incorporated into La 2- x Ba x SrCu 2 O 6 are eliminated dissociatively as O 2 at 620 °C and N 2 at 920 °C . The apparent conversion of absorbed NO to N 2 , which is also dependent on the Ba content, reached a maximum (ca.…”