Single atomic catalysts are successfully used in the field of fine chemical synthesis
Single atomic catalysts are successfully used in the field of fine chemical synthesis
Recently, dalian institute of chemical physics, Chinese academy of sciences academician zhang team Liu Jingyue professor at Arizona state university, cooperation with the United States, in a single atomic catalytic progress was made in the research field, the first to Pt/FeOx single atoms and quasi monatomic catalyst in hydrogenation, the choice of aromatic nitro compounds under mild reaction conditions (40 ℃, hydrogen pressure 0.3 MPa) obtained the extremely high activity and selectivity. This means that single atomic catalysts are successfully applied in the field of fine chemical synthesis.
Ethylene choose 3 - nitrobenzene hydrogenation, for example, the TOF value (per unit time per mole reaction substrates of transformation in the active center of volume) of 1500 h - 1, the optimal catalytic activity than those reported in literature 20 times higher; The selectivity of amino styrene is close to 99%, which is the highest value of the Pt base catalyst currently reported, and the catalyst is magnetic separation with good circulation stability and substrate universality.
Hydrogenation to choose with various substituent aromatic nitro compounds to the preparation of the corresponding aromatic amine is one of the most important fine chemical field response, in pesticide, medicine, dyes and polymer, and other fields have a wide range of applications. However, when the reactants contain C= C, C, C and other easy reduction groups, selective reduction of nitro is retained by other functional groups, the traditional transition metal hydrogenation catalyst is still a challenge. Single-atom and quasi-monatomic catalysts provide a green and effective solution to the problem and are expected to be applied in industry.
Monatomic catalyst is a new concept in the field of heterogeneous catalysis, its atoms dispersed uniformly activity not only can make the biggest metal atom utilization, at the same time could build a bridge between the heterogeneous catalysis and uniform phase catalysis. In 2011, zhang tao's team first prepared the Pt/FeOx single atomic catalyst and proposed the concept of single atom catalysis. In the last 3 years, single atomic catalysis has been developed rapidly, and international research teams have followed up the research. Zhang tao's team also produced Ir1/FeOx single atomic catalysts and applied them to water vapor transformation reactions.
