Xu Haitao, Luo Xikuo, Wang Jiajia, Su Yuqun, Zhao Xi, Li Yansong
State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Lab, Chemical Engineering Re-search Center , East China University of Science and Technology (ECUST) , 130 Meilong Road , Shanghai 200237 , China.
ACS Appl Mater Interfaces. 2019 Jun 5;11(22):20291-20297. doi: 10.1021/acsami.9b04748. Epub 2019 May 22.
In this study, spherical sandwich Au@Pd@UIO-67/Pt@UIO- n ( n = 66, 67, 69) core-shell catalysts were assembled. Au nanoparticles (NPs) were used as the core for the epitaxial growth of Pd shells, and Au@Pd core-shell NPs were successfully encapsulated in the center of monodispersed Au@Pd@UIO-67 nanospheres. Pt NPs were fully fixed onto the nanosphere surfaces to obtain Au@Pd@UIO-67/Pt composites; further coating with UIO- n led to Au@Pd@UIO-67/Pt@UIO- n, in which Pt NPs are sandwiched between the Au@Pd@UIO-67 core and the UIO- n shell. The Au@Pd core-shell NPs efficiently controlled the morphology and structure of UIO-67 and enhanced the CO selectivity of the catalyst. Pt NPs increased the CO conversion, and the UIO- n component effectively regulated the reverse water-gas shift reaction.
在本研究中，组装了球形夹心结构的Au@Pd@UIO-67/Pt@UIO-n（n = 66、67、69）核壳催化剂。金纳米颗粒（NPs）用作外延生长钯壳的核，并且Au@Pd核壳NPs成功地封装在单分散的Au@Pd@UIO-67纳米球的中心。铂纳米颗粒完全固定在纳米球表面以获得Au@Pd@UIO-67/Pt复合材料；进一步用UIO-n包覆得到Au@Pd@UIO-67/Pt@UIO-n，其中铂纳米颗粒夹在Au@Pd@UIO-6核心和UIO-n壳之间。Au@Pd核壳纳米颗粒有效地控制了UIO-67的形态和结构，并提高了催化剂对一氧化碳的选择性。铂纳米颗粒提高了一氧化碳的转化率，并且UIO-n组分有效地调节了逆水煤气变换反应。
