CNT-Supported MoxC Catalysts: Effect of Loading and Carburization Parameters

MoxC/CN (2) physisorption, SEM, and C-x catalysts, the heating rate during carburization has no effect on the catalysts. Instead, molybdenum loading and carburization atmosphere are the key factors for catalyst structure and performance. (2)/CH4 product ratio indicates changes in the catalyst properties at the loadings <20wt%, at which the activity is constant. Carburization in 20% CH4/H-2 yields 2nm sized crystallites of cubic -MoC. Carburization in pure H-2 and He yields hexagonal -Mo2C with a larger particle size. Both phases show different catalytic performances in terms of activity and CO2/CH4 selectivity. Thus, a multiparameter toolbox for fine-tuning of catalyst properties is presented.