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Updated: Sep 12, 2025
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Reaction-induced regioselective reconstruction of Ni-doped Ce(OH)3/CeO2 enables exceptional activity and selectivity
Wenbin Li1, Bing Liu2, Qing Guo1
1School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, China.
Abstract:
Reconstruction of catalysts by reaction environments represents a viable approach to create highly performed active sites. Herein, we develop a reaction-induced regioselective reconstruction of Ni-doped Ce(OH)3/CeO2 nanorods to form dual-active sites composed of carburized Ni clusters and frustrated Lewis pairs (FLPs), delivering exceptional activity, selectivity and stability for reverse water-gas shift reaction. Ni aggregation in the Ce(OH)3 region, coupled with in-situ carbonization by catalytically generated CO during reaction, induces the formation of the carburized Ni clusters, which effectively promoted H2 dissociation. Additionally, Ni doping in the CeO2 region and Ce(OH)3-to-CeO2 phase transition introduce more oxygen vacancies and thereby generated FLPs in CeO2, which facilitate CO2 adsorption and subsequent hydrogenation by spilled *H species from the carburized Ni clusters. Weak CO adsorption on both the carburized Ni clusters and FLPs significantly suppresses the methanation side-reaction. This reaction-induced regioselective reconstruction strategy provides a new avenue for designing highly performed catalysts.
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