Influence of synthesis method on molybdenum carbide crystal structure and catalytic performance in stearic acid hydrodeoxygenation

摘要

The role of the synthesis method of molybdenum carbide nanoparticle catalysts supported on carbon nanofibers on crystal structure and on catalytic performance in hydrodeoxygenation of stearic acid was investigated. We obtained the cubic phase of molybdenum carbide (alpha-MoC1-x) by impregnating carbon nanofibers with a solution of (NH4)(2)MoO4, then exposing them to 20% CH4/H-2 at 650 degrees C for 2 h. When increasing the Mo loading from 7.5 wt% to 20 wt% or using the carbothermal reduction method, i.e. using carbon from the support to reduce the (NH4)(2)MoO4 precursor at 800 degrees C for 6 h, the hexagonal phase (beta-Mo2C) resulted.