Related Experiment Video
Updated: May 26, 2025
Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Accelerating Reverse Water Gas Shift Reaction through Synergistic CO2 and H2 Activation on Ru-Fe-(VO-in-CeO2) Ternary
Haoyang Jiang1, Linyu Wang1, Chuanhao Wang2
1College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, the Frontiers Science Center for Critical Earth Material Cyclings, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210023, China.
Abstract:
The reverse water gas shift (RWGS) reaction shows promise for converting CO2 emissions to chemical feedstocks using renewable H2. However, achieving high selectivity and activity at low temperatures remains challenging due to the thermodynamically more favorable CO2 methanation reaction. Here we develop a robust Ru0.0025Ce0.7Fe0.3O2-δ solid-solution nanorod catalyst featuring a ternary Fe-Ru-oxygen vacancy (VO) center, overcoming limitations in intermediate adsorption and dissociation on single-component catalysts. Incorporating a trace amount of Ru (0.25 at. %) into Ce0.7Fe0.3O2-δ markedly enhances CO2 and H2 dissociation and H2O formation, while the primary Ce0.7Fe0.3O2-δ solid-solution component facilitates CO desorption, lowering the RWGS onset temperature to ∼200 °C. Experimental and computational analyses verify improved kinetics and stable performance with Ru0.0025Ce0.7Fe0.3O2-δ, yielding a CO production rate of 326 mmol gcat-1 h-1, ∼100% selectivity, and a 21% yield, approaching the thermodynamic limit within a 5 min batch reaction at ∼450 °C surface temperature under 300 W xenon lamp illumination.
Related Concept Videos
02:50Catalysis
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:34Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
02:45Acid-Catalyzed Hydration of Alkenes
02:13Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.