Establishing efficient CO_(2) hydrogenation technology based on the reverse water-gas shift (RWGS) reaction can effectively alleviate environmental problems while providing high-value-added products.The development of...Establishing efficient CO_(2) hydrogenation technology based on the reverse water-gas shift (RWGS) reaction can effectively alleviate environmental problems while providing high-value-added products.The development of suitable advanced supports is the key to improving the catalytic activity and selectivity.Herein,we designed and synthesized a new type of spinel-phase high entropy oxides [(FeCrMnAlGa)3O4-x,FMG],which exhibited remarkable RWGS performance after loading small-size Rh nanoparticles.The CO yield was as high as 145.5 μmolCO·gcat^(-1)·s^(-1) at 380 ℃ and the CO selectivity was nearly 100%.Moreover,the catalyst retained over 95% of the initial activity after 25 h of continuous catalyzing.Experimental and structural studies reveal that the FMG support has elemental synergy and high-entropy stability,which affect the Rh dispersion and oxygen vacancy generation,in turn achieving superior catalytic performance.展开更多
基金supported by the National Science and Technology Major Project of China(No.2021YFB3500700)the National Natural Science Foundation of China(Nos.22020102003,22025506,22271274)the Program of Science and Technology Development Plan of Jilin Province,China(Nos.20230101035JC,20230101022JC).
文摘Establishing efficient CO_(2) hydrogenation technology based on the reverse water-gas shift (RWGS) reaction can effectively alleviate environmental problems while providing high-value-added products.The development of suitable advanced supports is the key to improving the catalytic activity and selectivity.Herein,we designed and synthesized a new type of spinel-phase high entropy oxides [(FeCrMnAlGa)3O4-x,FMG],which exhibited remarkable RWGS performance after loading small-size Rh nanoparticles.The CO yield was as high as 145.5 μmolCO·gcat^(-1)·s^(-1) at 380 ℃ and the CO selectivity was nearly 100%.Moreover,the catalyst retained over 95% of the initial activity after 25 h of continuous catalyzing.Experimental and structural studies reveal that the FMG support has elemental synergy and high-entropy stability,which affect the Rh dispersion and oxygen vacancy generation,in turn achieving superior catalytic performance.
