Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (6): 970-977.doi: 10.1007/s40242-024-4079-4

• Articles • Previous Articles     Next Articles

Rh-loaded High-entropy Oxide for Efficiently Catalyzing the Reverse Water-Gas Shift Reaction

WANG Ke1,2, ZHANG Rui1,2, WANG Huilin1,2, ZHANG Lingling1,2, WANG Zijian1,2, WANG Xiao1,2, SONG Shuyan1,2, ZHANG Hongjie1,2,3   

  1. 1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China;
    2. School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China;
    3. Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • Received:2024-03-30 Online:2024-12-01 Published:2024-10-26
  • Contact: WANG Xiao,wangxiao@ciac.ac.cn;SONG Shuyan,songsy@ciac.ac.cn;ZHANG Hongjie,hongjie@ciac.ac.cn E-mail:wangxiao@ciac.ac.cn;songsy@ciac.ac.cn;hongjie@ciac.ac.cn
  • Supported by:
    This work was supported by the National Science and Technology Major Project of China (No. 2021YFB3500700), the National Natural Science Foundation of China (Nos. 22020102003, 22025506, 22271274), and the Program of Science and Technology Development Plan of Jilin Province, China (Nos. 20230101035JC, 20230101022JC).

Abstract: Establishing efficient CO2 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.

Key words: High entropy oxide (HEO), Reverse water-gas shift (RWGS), Size effect, Elemental synergy