Research & Reviews: Journal of Chemistry
Menue-ISSN: 2319-9849
e-ISSN: 2319-9849
Guoqing Ren
Shandong University, China
ScientificTracks Abstracts: Research & Reviews: Journal of Chemistry
With the unrestrained use of fossil energy, excessive emission of CO2 has become one of the most concerning environmental problems in the world. CO2 capture and conversion into liquid fuel is regarded to be a promising method for economically reducing CO2 emissions. However, CO2 is a symmetrical molecule with high thermodynamic stability. The current techniques to activate and conversion of CO2 need harsh reaction conditions, such as high temperature and pressure, which result in vast external energy input. The design and development of highefficiency catalysts that can work under ambient conditions is of great significant but challenging. Our group has been committed to catalyst design for a long time, and has made a series of research achievements in the conversion of CO2 into formate under ambient conditions. For CO2 hydrogenation reactions, it involves two elementary steps: CO2 activation and hydrogen dissociation. Thus, it is conceivable that high catalyst performance may be obtained by constructing synergetic active sites. Based on this understanding, we synthesized a Pd1-PdNPs synergistic structure (Figure 1a) on 2,6-pyridinedicarbonitrile-derived covalent triazine framework (CTF) by modulating the Pd loadings and reduction time, which exhibited high efficiency for the ambient hydrogenation of CO2 to formate. By regulating the ratio of Pd1 to PdNPs, we obtained the optimal catalytic activity with a formate formation rate of 3.66 molHCOOMâ�¢molPd-1â�¢h-1 under ambient conditions (30�°C, 0.1 MPa). To increase the usage of noble metals, we also designed a heterogeneous synergetic dual single-atom Pd catalyst by using 2,6-DCP-CTF as the support, which exhibited an improved activity for CO2 hydrogenation to formate (TOF: 13.46 h-1). Two major factors contributing to this extraordinary catalytic activity include the pore enrichment effect of the microporous structures and the ternary synergetic effect among two neighboring Pd atoms and the rich nitrogen environment. Our work may provide new insight into the ambient conversion of CO2 into other liquid fuels, such as methanol and gasoline, which is allowed by thermodynamics Keywords: Advanced Chemistry, Organic reactions , Medicinal chemistry
Assistant professor at Shandong University. Research interests include heterogeneous catalysis, CO2 capture and conversion. Received Ph.D. degree in chemical engineering and technology from Dalian Institute of Chemical Physics