Li Mengli, Xu Zhuang, Chen Yuhao, Shen Guowang, Wang Xugen, Dai Bin
School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832000, China.
Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi 832000, China.
Nanomaterials (Basel). 2021 Dec 29;12(1):98. doi: 10.3390/nano12010098.
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 CHCOOH, which makes catalysts different in terms of catalytic activity.
具有大比表面积和丰富孔结构的金属有机框架（MOF）衍生材料有利于催化性能。在本工作中，成功制备了MOF。通过在氮气下对MOF进行热解，获得了具有不同乙炔乙酰氧基化活性位点的锌基催化剂。研究了氧原子、氮原子以及氧和氮原子共存对MOF衍生催化剂的结构和催化性能的影响。结果表明，具有不同催化活性的催化剂分别是Zn-O-C（33%）、Zn-O/N-C（27%）和Zn-N-C（12%）。通过X射线光电子能谱（XPS）测量可以证实，不同活性位点的形成会影响锌的电子云密度。锌的电子云密度影响吸引CHCOOH的能力，这使得催化剂在催化活性方面存在差异。
