Linker Engineering Regulating the Electron Transfer Between Ni Nanoparticles and Re-MOFs for Enhanced DCPD Hydrogenation Performance
MATERIALS TODAY CHEMISTRY(2025)
Abstract
The linker engineering is an effective strategy for regulating the electronic properties of the active sites within metal-organic frameworks (MOFs), leading to enhanced catalytic activity and desirable reaction pathways. In this paper, Ni nanoparticles (NPs) incorporated into Ce-UiO-66-X with diverse linkers with different functional groups (X =-H, -NH2, -NO2,-Br) on their pore walls have been fabricated for hydrogenation of dicyclopentadiene (DCPD). ThFe presence of the functional groups with electron-donating or electron-absorbing effect played a crucial role in modulating the microenvironment of the Ni NPs by facilitating multi-path electron transfer between the functional groups, Ce metal nodes and the Ni NPs. Among the different Ni/Ce-UiO-66-X nano- composites, Ni/Ce-UiO-66-NO2 and Ni/Ce-UiO-66-Br exhibited higher catalytic activity towards DCPD hydrogenation, indicating that the synergistic effects of electron-absorbing groups and Ni NPs in enhancing the catalytic activity, which can be attributed to the favorable electronic states of Ni NPs surface for the adsorption of H2 and electron-rich C--C of DCPD. This study highlights the potential for achieving improved catalytic performance by accurately regulating the microchemical environment around active sites within MOFs by linker engineering.
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Key words
MOFs,Ni NPs,Electron transfer,Linker engineering,DCPD hydrogenation
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