Effect of Lanthanum Doping on the reactivity of unsupported CoMoS2 catalysts

Abstract In the present study, catalytic systems based on La-doping were developed to improve activity and performance of CoMoS2 hydrodesulfurization catalysts. Lanthanum-doped at 5, 10, or 25% Co content in catalysts synthesized through a solvothermal process. X-ray diffraction (XRD) photoelectron spectroscopy (XPS) analyses confirmed triphasic consisting Co9S8, MoS2, La2S3. The La doped showed enhanced compared with under same conditions. prepared synthesis conditions 6.80 mol g-1 s-1, however, La0.05Co0.95MoS2 doping 6.51 g -1 s-1 whereas La0.1Co0.9MoS2 La0.25Co0.75MoS2 samples activities 10.7 s-1. reaction products indicated major pathway was direct desulfurization. catalyst after one cycle lower amount carbon, than undoped catalyst.