研究甲醇低压气相羰基化合成醋酸的含铑催化剂,用活性炭载体较之用Al_2O_3和SiO_2为载体的活性和选择性为佳,但Al_2O_3和SiO_2一旦载入一定量炭后再制成含铑催化剂,则其活性和选择性与用活性炭为载体的含铑催化剂相同。用顺磁共振研究含铑催化剂的结构,发现铑碳之间显示出新的顺磁讯号。由此证明铑碳之间的轨道和电子发生了相互作用,形成了一种Rh—C的表面络合物。 Studies on the rhodium-containing catalysts for the synthesis of acetic acid from the low-pressure gas-phase carbonylation of methanol show that the activity and selectivity of activated carbon support are better than that of Al 2 O 3 and SiO 2. However, when Al 2 O 3 and SiO 2 are loaded into a certain amount of carbon, Its activity and selectivity are the same as rhodium-containing catalysts supported on activated carbon. Using paramagnetic resonance to study the structure of rhodium-containing catalysts, a new paramagnetic signal was found between the rhodium carbons. Thus it was demonstrated that the orbital of rhodium carbon interacted with the electrons to form a Rh-C surface complex.