Key Laboratory of Mesoscopic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
J Colloid Interface Sci. 2011 Dec 15;364(2):435-42. doi: 10.1016/j.jcis.2011.08.022. Epub 2011 Aug 16.
XRD, LRS, TPR and in situ NH(3) adsorption FT-IR were used to investigate the dispersion state of the copper oxide and molybdena species of MoO(3)/CeO(2) and CuO/MoO(3)/CeO(2) catalysts as well as their surface acidity. The results showed that the molybdena monolayer modification promoted the dispersion of CuO due to the formation of new tetrahedral vacancies. Meanwhile, CuO changed the structure of molybdenum species and then influenced the surface acidity of the samples. A detail discussion about the possible model of the surface structure of the catalyst was presented. In addition, combining with the in situ NH(3) adsorption FT-IR, the relationships between the activities for ''NO + NH(3) + O(2)'' reaction and surface acid properties (Brønsted and Lewis acid sites) of the catalysts were discussed.
XRD、LRS、TPR 和原位 NH(3)吸附 FT-IR 被用于研究 MoO(3)/CeO(2) 和 CuO/MoO(3)/CeO(2)催化剂中氧化铜和氧化钼物种的分散状态以及它们的表面酸性。结果表明，钼的单层修饰由于形成了新的四面体空位而促进了 CuO 的分散。同时，CuO 改变了钼物种的结构，进而影响了样品的表面酸性。对催化剂表面结构的可能模型进行了详细的讨论。此外，结合原位 NH(3)吸附 FT-IR，讨论了催化剂的“NO+NH(3)+O(2)”反应活性与表面酸性（Brønsted 和 Lewis 酸位）之间的关系。
