CO₂ reverse water‐gas shift reaction on mesoporous M‐CeO₂ catalysts

Abstract

Mesoporous M‐CeO 2 (M = Ni, Co, Fe, Mn, and Cu) catalysts were prepared using the hard‐template method and applied to investigate CO 2 reverse water‐gas shift (RWGS) reaction. The physicochemical properties were studied using H 2 ‐TPR, XRD, BET, CO 2 ‐TPD, and H 2 ‐TPD. Results show that the specific surface areas of the prepared Ni‐CeO 2 , Co‐CeO 2 , Fe‐CeO 2 , Mn‐CeO 2 , and Cu‐CeO 2 catalysts exceed 120 m 2 /g. CO 2 RWGS reaction performances are affected by the d ‐orbital holes of transition metals. CO 2 RWGS reaction catalytic activities are ranked as follows: Ni‐CeO 2 > Cu‐CeO 2 > Co‐CeO 2 > Fe‐CeO 2 ≈ Mn‐CeO 2 . The Cu‐CeO 2 , Fe‐CeO 2 , and Mn‐CeO 2 catalysts maintain 100 % CO selectivity at the studied temperature.