Pd–ReO_x/C catalysts with different Re contents were prepared and employed to catalyze the aqueous hydrogenation of itaconic acid in this study. The Pd–ReO_x/C catalysts were characterized by XRD, TEM, BET, NH₃-TPD and H₂-TPR. Results showed that the addition of ReO_x species in supported Pd catalysts promoted the direct conversion of itaconic acid to 2-methyl-1,4-butanediol. The promoting effect was ascribed to the interaction between Pd and ReO_x species, as has been proved by the characterizations. A 2-methyl-1,4-butanediol yield of above 80% could be obtained over Pd–3ReO_x/C under the reaction condition of 180 °C, 4 MPa H₂.

本研究制备了具有不同含量的Pd-ReO _x / C催化剂，并用于催化衣康酸的含水加氢反应。通过XRD，TEM，BET，NH ₃ -TPD和H ₂ -TPR对Pd-ReO _x / C催化剂进行了表征。结果表明，在负载的Pd催化剂中添加ReO _x物种促进了衣康酸直接转化为2-甲基-1,4-丁二醇。促进作用归因于Pd和ReO _x物种之间的相互作用，已通过表征证明。在180°C，4 MPa H ₂的反应条件下，在Pd-3ReO _x / C上可以获得2-甲基-1,4-丁二醇的收率超过80％。