Constructing stable active sites in catalysts for high temperature catalytic reactions remains challenging. Here, the authors manage to make stable copper clusters in the copper-ceria catalyst with high Cu loading (15 wt.%) for the high-temperature reverse water gas shift reaction. For high-temperature catalytic reaction, it is of significant importance and challenge to construct stable active sites in catalysts. Herein, we report the construction of sufficient and stable copper clusters in the copper-ceria catalyst with high Cu loading (15 wt.%) for the high-temperature reverse water gas shift (RWGS) reaction. Under very harsh working conditions, the ceria nanorods suffered a partial sintering, on which the 2D and 3D copper clusters were formed. This partially sintered catalyst exhibits unmatched activity and excellent durability at high temperature. The interaction between the copper and ceria ensures the copper clusters stably anchored on the surface of ceria. Abundant in situ generated and consumed surface oxygen vacancies form synergistic effect with adjacent copper clusters to promote the reaction process. This work investigates the structure-function relation of the catalyst with sintered and inhomogeneous structure and explores the potential application of the sintered catalyst in C1 chemistry.
[1]Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Key Lab Special Aggregated Mat, Jinan 250100, Peoples R China.
[2]Chizhou Univ, Key Lab Micronano Powder & Adv Energy Mat Anhui H, Chizhou 247000, Peoples R China.
[3]Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China.
(8.0+极速模式)