Study on the Effect of K on the Performance of CoCu/ZrMgOx Catalyst for the RWGS Reaction

Under the condition 550ºC, the CO2 conversion and CO selectivity were 23.32% and 99.92%, respectively; the CO-STY reached 5361.14 g∙kgcat-1∙h-1, and the catalyst could operate stably for 120 h without significant deactivation. In situ DRIFTS results confirmed that CO formation predominantly follows a formate intermediate pathway. Although the K promoter did not alter the reaction pathway, it facilitated the rapid generation of HCOO* intermediates, thereby increasing the CO yield.