MOFs-Derived Zn-Based Catalysts in Acetylene Acetoxylation

Area of Science:

• Materials Science
• Catalysis
• Nanotechnology

Background:

• Metal-organic frameworks (MOFs)-derived materials offer high surface area and porosity, beneficial for catalysis.
• Developing efficient catalysts is crucial for chemical transformations like acetylene acetoxylation.

Purpose of the Study:

• To synthesize MOF-derived zinc-based catalysts with distinct active sites.
• To investigate the impact of oxygen and nitrogen heteroatoms on catalyst structure and performance.
• To correlate active site characteristics with catalytic activity in acetylene acetoxylation.

Main Methods:

• Synthesis of MOFs.
• Pyrolysis of MOFs under nitrogen atmosphere to yield derived catalysts.
• Characterization using X-ray photoelectron spectroscopy (XPS).
• Evaluation of catalytic performance in acetylene acetoxylation.

Main Results:

• Catalysts with different active sites (Zn-O-C, Zn-O/N-C, Zn-N-C) were successfully prepared.
• Catalytic activity varied significantly: Zn-O-C (33%), Zn-O/N-C (27%), and Zn-N-C (12%).
• XPS analysis revealed that active sites influence the electron cloud density of zinc.
• Zinc electron density affects the adsorption of acetic acid (CH3COOH), dictating catalytic activity.

Conclusions:

• The type of active site in MOF-derived catalysts critically determines their performance in acetylene acetoxylation.
• Zn-O-C active sites demonstrate superior catalytic activity compared to Zn-O/N-C and Zn-N-C.
• Understanding the electronic properties of zinc is key to designing effective MOF-derived catalysts.