| Summary: | The reduction of CO<sub>2</sub> to CO through the reverse water gas shift (RWGS) reaction is an important catalytic step in the overall strategy of CO<sub>2</sub> utilization. The product CO can be subsequently used as a feedstock for a variety of useful reactions, including the synthesis of fuels through the Fischer–Tropsch process. Recent works have demonstrated that potassium-promoted molybdenum carbide (K-Mo<sub>2</sub>C) is a highly selective catalyst for low-temperature RWGS. In this work, we describe the systematic investigation of key parameters in the synthesis of K-Mo<sub>2</sub>C, and their influence on the overall activity and selectivity for the low-temperature RWGS reaction. Specifically, we demonstrate how catalyst support, precursor calcination, catalyst loading, and long-term ambient storage influence performance of the K-Mo<sub>2</sub>C catalyst.
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