K-Promoted Co–CeO2 Catalyst for the Reverse Water–Gas Shift Reaction

A K-promoted Co–CeO2 catalyst prepared through the coprecipitation–impregnation method was shown to give a higher activity for the reverse water–gas shift reaction but with lower formation of the side product CH4. TPR results suggested that the addition of small amounts of K (1 wt %) improved the cobalt oxide reducibility through an electron-donation effect.