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. 2021 Dec 29;12(1):98.
doi: 10.3390/nano12010098.

MOFs-Derived Zn-Based Catalysts in Acetylene Acetoxylation

Mengli Li  1 , Zhuang Xu  1 , Yuhao Chen  1 , Guowang Shen  1 , Xugen Wang  1   2 , Bin Dai  1   2
Affiliations

MOFs-Derived Zn-Based Catalysts in Acetylene Acetoxylation

Mengli Li et al. Nanomaterials (Basel). .

Abstract

Metal-organic frameworks (MOFs)-derived materials with a large specific surface area and rich pore structures are favorable for catalytic performance. In this work, MOFs are successfully prepared. Through pyrolysis of MOFs under nitrogen gas, zinc-based catalysts with different active sites for acetylene acetoxylation are obtained. The influence of the oxygen atom, nitrogen atom, and coexistence of oxygen and nitrogen atoms on the structure and catalytic performance of MOFs-derived catalysts was investigated. According to the results, the catalysts with different catalytic activity are Zn-O-C (33%), Zn-O/N-C (27%), and Zn-N-C (12%). From the measurements of X-ray photoelectron spectroscopy (XPS), it can be confirmed that the formation of different active sites affects the electron cloud density of zinc. The electron cloud density of zinc affects the ability to attract CH3COOH, which makes catalysts different in terms of catalytic activity.

Keywords: acetylene acetoxylation; heteroatoms; metal–organic frameworks.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The conversion rate curves of Zn-O-C, Zn-O/N-C, and Zn-N-C catalysts over time, respectively.
Figure 2
Figure 2
Schematic diagram of chemical structures for MOF5 (a), TEDA-PD (b), and ZIF8 (c).
Figure 3
Figure 3
Schematic diagrams of the synthesis process and the SEM images of MOF5 (a), TEDA-PD (b), and ZIF8 (c), respectively.
Figure 4
Figure 4
FT-IR spectra (a) and TG spectra (b) of MOF5, TEDA-PD, and ZIF8. Specific surface areas (c) and adsorption and desorption curves (d) of MOF5, TEDA-PD, and ZIF8 after calcination.
Figure 5
Figure 5
XPS pattern (a) and high-resolution XPS spectra of Zn 2p (b), O 1s (c), and N 1s (d) of Zn-O-C, Zn-O/N-C, and Zn-N-C.
Figure 6
Figure 6
TPD analysis of Zn-O-C, Zn-O/N-C, and Zn-N-C: (a) CH3COOH and (b) C2H2.
Figure 7
Figure 7
Reaction flow diagram taking Zn-O-C as an example.
See this image and copyright information in PMC

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