A series of Pd-Co bimetallic catalysts were smoothly synthesized using sulfur-modified carbon nanotubes (S-CNT) as support by impregnation method. Those catalysts were characterized by XRD, XPS, TEM, SEM, H₂-TPR, TGA, and nitrogen adsorption-desorption. Selective catalytic hydrogenolysis of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) was realized over these synthesized sulfur-modified Pd-Co bimetallic supported on carbon nanotubes (PdCo_x/S-CNT) under mild conditions. Among them, PdCo₈/S-CNT catalyst possessed extremely active and selective for the production of DMF, giving 96.0 % conversion of HMF with 83.7 % selectivity to DMF at the temperature of 120 °C with 0.3 MPa H₂ for 13 h. It is found that the formed Co₉S₈ species are related to the high catalytic activity in PdCo₈/S-CNT. Control experiments for evaluating the roles of palladium and Co₉S₈ revealed that Pd catalyzed the hydrogenation of the aldehyde group in HMF whereas Co₉S₈ was beneficial for hydrogenolysis of the hydroxy group in HMF. The remarkable hydrogenolysis/hydrogenation performance of the bifunctional Pd-Co₉S₈/S-CNT was due to support-enhanced adsorption effect and the effective synergy between highly dispersed metallic Pd and the Co₉S₈ nanoparticles.

以硫改性碳纳米管（S-CNT）为载体，通过浸渍法顺利合成了一系列Pd-Co双金属催化剂。这些催化剂通过XRD，XPS，TEM，SEM，H ₂ -TPR，TGA和氮吸附-脱附来表征。在温和的条件下，在碳纳米管（PdCo _x / S-CNT）上负载的这些合成的硫改性的Pd-Co双金属化合物上实现了5-羟甲基糠醛（ HMF）选择性催化氢解为2,5-二甲基呋喃（DMF）。其中，PdCo ₈ / S-CNT催化剂对DMF的生产具有极高的活性和选择性，在120℃，0.3 MPa H ₂的温度下，HMF的转化率为96.0％，对DMF的选择性为83.7％。持续13小时。发现形成的Co ₉ S ₈物种与PdCo ₈ / S-CNT中的高催化活性有关。评估钯和Co ₉ S ₈的作用的对照实验表明，钯催化HMF中醛基的氢化，而Co ₉ S ₈有助于HMF中羟基的氢解。双功能Pd-Co ₉ S ₈ / S-CNT的显着氢解/氢化性能归因于载体增强的吸附作用以及高度分散的金属Pd与Co ₉ S ₈纳米粒子之间的有效协同作用。