Related Experiment Video
Updated: May 23, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
CO2 hydrogenation on a metal hydride surface
Shunsuke Kato1, Andreas Borgschulte, Davide Ferri
1Laboratory for Hydrogen & Energy, Dübendorf, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
The catalytic hydrogenation of carbon dioxide (CO2) on metal hydrides shows that CO2 adsorption, not hydrogen dissociation, controls the methanation reaction rate. This finding is key for developing efficient CO2 conversion catalysts.
Area of Science:
- Materials Science
- Surface Chemistry
- Catalysis
Background:
- Metal hydrides are promising for CO2 hydrogenation due to their hydrogen storage capabilities.
- Understanding surface reactions is crucial for optimizing catalytic processes.
- The catalytic hydrogenation of CO2 is a key reaction for carbon utilization.
Purpose of the Study:
- To investigate the catalytic hydrogenation of CO2 on metal hydrides.
- To analyze surface segregation during the reaction.
- To determine the rate-limiting step in CO2 methanation on Mg2NiH4.
Main Methods:
- In situ X-ray photoelectron spectroscopy (XPS) for surface analysis.
- Thermal desorption spectroscopy (TDS) and mass spectrometry (MS) for gas analysis.
- Time-of-flight secondary ion mass spectrometry (ToF-SIMS) for surface composition.
- Catalytic activity measurements using a flow reactor and gas chromatography (GC).
Main Results:
- Surface processes on Mg2NiH4 were analyzed during CO2 hydrogenation.
- Hydrogen desorption was studied in conjunction with catalytic activity.
- The rate-controlling step was identified for the CO2 methanation reaction.
Conclusions:
- Dissociative adsorption of CO2 on the hydride surface is the rate-limiting step.
- Hydrogen molecule dissociation is not the rate-controlling step in CO2 methanation.
- This research provides insights into the mechanism of CO2 hydrogenation on metal hydrides.
More Related Videos
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
Related Concept Videos
Reduction 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 surface of...
Reduction 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...
Catalysis
Catalysis
Reduction 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.
Heterogeneous Catalysis