Application of Ceria in CO₂ Conversion Catalysis

Abstract

The growing threat of global climate change has received increasing attention in recent years. The conversion of CO2 to fuels and chemicals is vital for reducing emissions of greenhouse gases and neutralizing the negative impacts of CO2 emissions on the environment. Various CO2 conversion routes have been proposed on the basis of heterogeneous catalysis. However, the development of a high-performance catalyst with satisfactory activity and selectivity remains challenging. In past decades, the role of ceria in activating CO2 under mild conditions has been widely demonstrated, which has inspired the design of novel heterogeneous catalysts and contributed to the extensive catalytic applications in CO2 conversion reactions. The applications of ceria have been studied in three groups of CO2 conversion reactions, including hydrogenation of CO2, activation of CO2 with alkanes, and nonreductive CO2 transformations. Investigations into these reactions show that CeO2 is a highly tunable material with great potential for CO2 catalysis due to its unique properties such as abundant oxygen vacancy and metal–support interaction. The catalytic performance of CeO2-based catalysts can be improved by various strategies including metal doping, forming mixed oxides or solid solution, as well as morphological control. Future works are proposed to address the challenges in current research and to further advance the CeO2-based catalysts in CO2 conversion reactions.

Efficient electroreduction of CO2to C2+products on CeO2modified CuO

“…47 According to the Sabatier principle, the energy barrier for the activation of water should be particularly controlled, which could provide enough hydrogen for the hydrogenation of intermediates but not cause excessive production of H 2 . Considering cerium oxide (CeO 2 ) has a high activity for water activation in CO 2 hydrogenation and shows poor activity for the hydrogen evolution reaction (HER), [48][49][50] we can assume that the activity for C 2+ products would be improved compared to the CeO 2 modi-ed Cu-based catalyst in CO 2 RR.…”

Flame Synthesis of Cu/ZnO–CeO2 Catalysts: Synergistic Metal–Support Interactions Promote CH3OH Selectivity in CO2 Hydrogenation

“… 13 − 16 CeO 2 is another promising support material to promote CO 2 conversion. 17 CeO 2 is more basic and less hydrophilic than Al 2 O 3 , which can be beneficial for CH 3 OH productivity and catalyst stability, respectively. 18 , 19 CeO 2 interacts strongly with Cu, which may improve dispersion and resistance against sintering of the Cu particles.…”

Stabilization of Metal Single Atoms on Carbon and TiO2 Supports for CO2 Hydrogenation: The Importance of Regulating Charge Transfer

“…[ 32 ] As the metal‐support interface can play a decisive role in CO 2 hydrogenation, [ 33 ] the choice of the support is also crucial. Reducible oxides such as TiO 2 and particularly CeO 2 [ 34 ] have proven to be efficient in that way. The use of carbon materials has been much less investigated.…”