Controlled synthesis of Bi- and tri-nuclear Cu-oxo nanoclusters on metal–organic frameworks and the structure–reactivity correlations

Abstract

Precisely tuning the nuclearity of supported metal nanoclusters is pivotal for designing more superior catalytic systems, but it remains practically challenging. By utilising the chemical and molecular specificity of UiO-66-NH2...

Cu–Co Dual-Atom Catalysts Supported on Hierarchical USY Zeolites for an Efficient Cross-Dehydrogenative C(sp2)–N Coupling Reaction

“…The adsorption binding of reaction substrates with EPR active centers can significantly affect the peak intensity by altering the overall unpaired electrons in the system. , The continuous-wave EPR spectra of Cu 1 –Y, Cu 2 –Y, and Cu–Co–Y before and after the loading of individual substrates ( 1a and 2a ) were measured. The probe-assisted EPR spectra of Cu 1 –Y, Cu 2 –Y, and Cu–Co–Y are presented in Figure and Figure S18.…”

Controlled synthesis of Cu,Fe dual-atom catalysts restrained on metal–organic frameworks for efficient O2 activation

“…A crystalline UiO-66-NH 2 powder sample as a host solid support has been prepared (as used before, 22–24 see Fig. S1 and S2 in the ESI† for basic structural and morphological characterisation) with a chemical formula of Zr 6 O 4 (OH) 4 (CO 2 C 6 H 3 NH 2 CO 2 ) 5.8 (space group: Fm-3m) with a metal-to-linker ratio of 1 : 0.97.…”

“…S5†) and Cu 1 -UiO (Fig. S6†) samples (as synthesised before 22,24 ) were used for a comparison study.…”

“…A similar observation is also made in related studies of Cu-based DACs on the Zr 6 O 4 of UiO-66-NH 2 . 24 As a complementary technique to FTIR, we employed Raman spectroscopy to further study the bonding information in the samples (Fig. 1f).…”

“…It is consistent with our previous study on structurally related Cu 1 -UiO and Cu 2 -UiO where the remarkably different surface sensitivity and product selectivity (in the photocatalytic formic acid reforming reaction) have been attributed to the difference in the adsorption configurations. 24…”