Related Experiment Video
Updated: Aug 14, 2026
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Resolving the Activity-Stability Trade-Off in Methane Dry Reforming via Ru-Preferential CH4 Activation on Isolated
Jingyi Wang1, Ming Li1,2, Min Liu3,4
1School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 13, 2026
Summary
This study introduces a novel dual-site catalyst for dry reforming of methane, enhancing syngas production. The new catalyst design improves activity and stability, overcoming limitations of traditional methods.
Area of Science:
- Catalysis
- Materials Science
- Chemical Engineering
Background:
- Dry reforming of methane (CH4 + CO2 → 2H2 + 2CO) is crucial for syngas production but faces challenges with low-temperature activity and deactivation.
- Existing catalysts often suffer from carbon deposition and limited efficiency at lower temperatures, hindering practical applications.
Purpose of the Study:
- To develop a highly active and stable catalyst for dry reforming of methane by designing an isolated dual-site architecture.
- To investigate the synergistic effects of co-anchored Nickel (Ni) and Ruthenium (Ru) atomic sites on defect-rich Cerium Dioxide (CeO2) for enhanced CH4/CO2 conversion.
Main Methods:
- Synthesis of a geometrically isolated dual-site catalyst (1NiRu/CeO2) by co-anchoring Ni and Ru atomic sites on defect-rich CeO2.
- Evaluation of catalytic performance for dry reforming of methane at various temperatures (500°C-750°C).
- Utilized operando spectroscopy and theoretical calculations to elucidate reaction mechanisms and active sites.
Main Results:
- The optimized 1NiRu/CeO2 catalyst achieved significant CH4/CO2 conversions (21.46%/24.10% at 500°C) and a H2/CO ratio of 0.91.
- The catalyst demonstrated excellent stability over 150 hours with negligible carbon deposition, outperforming monometallic Ru catalysts.
- Operando studies revealed preferential CH4 activation at Ru sites and CO2 activation at Ni sites, facilitated by a self-sustaining redox cycle involving lattice oxygen vacancies.
Conclusions:
- The isolated dual-site architecture with synergistic Ni-Ru interaction and CeO2 defects effectively suppresses carbon deposition and enhances low-temperature activity.
- This strategy provides a generalizable approach for designing robust and efficient catalysts for methane valorization via dry reforming.
- The developed catalyst enables efficient and durable CH4/CO2 conversion, paving the way for improved syngas production.
Related Concept Videos
02:50Catalysis
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
01:27Catalysis
Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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...
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...
02:17Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule
If a set of reactants can yield multiple constitutional isomers, but one of the isomers is obtained as the major product, the reaction is said to be regioselective. In such reactions, bond formation or breaking is favored at one reaction site over others.
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Introduction
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.
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.
01:13meta-Directing Deactivators: –NO2, –CN, –CHO, –CO2R, –COR, –CO2H
All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for the...