TY - JOUR
T1 - Enhancing catalytic performance via structure core-shell metal-organic frameworks
AU - Gong, Yanyan
AU - Yuan, Ye
AU - Chen, Cheng
AU - Zhang, Pan
AU - Wang, Jichao
AU - Khan, Anish
AU - Zhuiykov, Serge
AU - Chaemchuen, Somboon
AU - Verpoort, Francis
PY - 2019/7/1
Y1 - 2019/7/1
N2 - A core-shell structure metal-organic framework based on the Zr clusters bridging with BDC linkers (UiO-66) as a core-structure and BPYDC linkers (UiO-67-BPY) as a shell-structure was developed (UiO-67-BPY@UiO-66). The combination of several techniques such as XRD, FTIR, SEM, TEM, and surface area analysis etc. were applied for the characterization and confirmed a core-shell structure of UiO-67-BPY@UiO-66. Taking advantage of the high porous stability of the core-structure (UiO-66) and the presence of active Lewis basic sites from the bipyridinic linker in the shell layer (UiO-67-BPY) could be advantageous for basic-catalyzed reactions. The synthesized core-shell material was applied as a heterogeneous catalyst for the Knoevenagel condensation as a model reaction. An excellent catalytic performance was obtained by the core-shell material over traditional MOFs and other previous reports based on MOFs. The excellent dispersion of the active sites (Lewis basic) in the outer layer of the designed core-shell structure was a breakthrough to prevent mass diffusion limitation during catalysis. Additionally, the catalyst can be recycled and maintained its high catalytic performance at least for four cycles.
AB - A core-shell structure metal-organic framework based on the Zr clusters bridging with BDC linkers (UiO-66) as a core-structure and BPYDC linkers (UiO-67-BPY) as a shell-structure was developed (UiO-67-BPY@UiO-66). The combination of several techniques such as XRD, FTIR, SEM, TEM, and surface area analysis etc. were applied for the characterization and confirmed a core-shell structure of UiO-67-BPY@UiO-66. Taking advantage of the high porous stability of the core-structure (UiO-66) and the presence of active Lewis basic sites from the bipyridinic linker in the shell layer (UiO-67-BPY) could be advantageous for basic-catalyzed reactions. The synthesized core-shell material was applied as a heterogeneous catalyst for the Knoevenagel condensation as a model reaction. An excellent catalytic performance was obtained by the core-shell material over traditional MOFs and other previous reports based on MOFs. The excellent dispersion of the active sites (Lewis basic) in the outer layer of the designed core-shell structure was a breakthrough to prevent mass diffusion limitation during catalysis. Additionally, the catalyst can be recycled and maintained its high catalytic performance at least for four cycles.
KW - Core-shell structure
KW - Heterogeneous catalysis
KW - Knoevenagel condensation
KW - MOF@MOF
KW - MOFs
UR - http://www.scopus.com/inward/record.url?scp=85068091126&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85068091126&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2019.06.031
DO - 10.1016/j.jcat.2019.06.031
M3 - Article
AN - SCOPUS:85068091126
VL - 375
SP - 371
EP - 379
JO - Journal of Catalysis
JF - Journal of Catalysis
SN - 0021-9517
ER -