Controllable Synthesis of Vacancy-Defect Cu Site and Its Catalysis for the Manufacture of Vinyl Chloride Monomer was written by Wang, Bolin;Jiang, Zhao;Wang, Ting;Tang, Qi;Yu, Mingde;Feng, Tao;Tian, Min;Chang, Renqin;Yue, Yuxue;Pan, Zhiyan;Zhao, Jia;Li, Xiaonian. And the article was included in ACS Catalysis in 2021.Safety of 1-Methyl-3-propylimidazolium Chloride This article mentions the following:
Designing favorable structures of active sites and clarifying the structure-activity relationship are important to narrow the large activity gap between Cu-based and the noble-metal-based catalytic systems for vinyl chloride production Herein, we report a facile controllable thermal method for fabricating the platform of Cu single-atom catalysts ranging from the standard no-vacancy-defect CuCl3-N to vacancy-defect CuCl2V-N (“V” for the vacancy-defect site) and to no-vacancy-defect CuN4. The gradually released C-Cl derivatives promote the vacancy-defect generation under elevated temperatures, and the activity gap between Cu- and the noble-metal-based systems is found to be dramatically narrowed from classic ~37-fold to ~1.5-fold on the vacancy-defect sites. Kinetic anal. shows that the competitive adsorption between acetylene and hydrogen chloride on the CuCl2V-N site contributed more to the catalytic performance than the single hydrogen chloride adsorption on site CuCl3-N or CuN4. Furthermore, when the CuCl2V-N site is preoccupied and adsorbed by acetylene, the reaction energy barrier decreases from 35 to 24 kJ/mol, indicating that the single activation of acetylene is more favorable for catalytic activity than that of the dual-activation of acetylene and hydrogen chloride. DFT calculations revealed the specific reaction mechanism catalyzed on the vacancy-defect CuCl2V-N site, i.e., where the vacancy-defect not only affects the activation behavior of substrates but also regulates the reaction pathway. Excellent catalytic performance can be maintained under the interaction of high concentration of vinyl chloride and H2S impurity. This work opens a new window for controllable synthesis of vacancy-defect sites of single metallic atoms in catalysis design and enhancing catalytic activity. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Safety of 1-Methyl-3-propylimidazolium Chloride).
1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. Imidazole is the basic core of some natural products such as histidine, purine, histamine and DNA based structures, etc. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Many drugs contain an imidazole ring, such as certain antifungal drugs, the nitroimidazole series of antibiotics, and the sedative midazolam.Safety of 1-Methyl-3-propylimidazolium Chloride
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem