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- W2380936498 abstract "BaCO_3-Pt/(γ-Al_2O_3) and Pt-BaCO_3/(γ-Al_2O_3) samples with different BaCO_3 loadings were prepared by the impregnation method and investigated as NO_x storage catalysts.XRD and FT-IR spectroscopy were used to characterize the samples.BaCO_3 could disperse onto the surface of the support,and the dispersed(BaCO_3) was the major active species for NO_x storage.The sample with the utmost dispersion capacity(threshold) of BaCO_3 had the largest NO_x storage capacity and the largest percentage of Ba involved in the storage.Different loading(sequences) of Pt and BaCO_3 resulted in different BaCO_3 dispersion thresholds.When loading Pt before BaCO_3,the dispersion threshold of BaCO_3 was 0.24 g/g.However,when impregnating BaCO_3/(γ-Al_2O_3) with H_2PtCl_6 solution,the dispersion capacity of BaCO_3 decreased.By fixing the BaCO_3 content at the dispersion threshold and loading Pt before BaCO_3,we obtained a catalyst with high NO_x storage capacity and large percentage of(active) Ba." @default.
- W2380936498 created "2016-06-24" @default.
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- W2380936498 date "2005-01-01" @default.
- W2380936498 modified "2023-09-25" @default.
- W2380936498 title "Dispersion of BaCO_3 on the Surface of γ-Al_2O_3 and Its Storage Capacity for NO_x" @default.
- W2380936498 hasPublicationYear "2005" @default.
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