Related Experiment Video
Updated: Jun 7, 2025
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Towards superior CO2RR catalysts: Deciphering the selectivity puzzle over dual-atom catalyst
1State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Dual-atom catalysts (DACs) show high CO selectivity in electrocatalytic CO2 reduction, contrary to theory. This study reveals that high CO coverage on CuFe-N6-C catalysts promotes CO desorption over hydrogenation, explaining the observed selectivity.
Area of Science:
- Catalysis
- Electrocatalysis
- Materials Science
Background:
- Electrocatalytic CO2 reduction (CO2RR) is crucial, but CO2RR selectivity is complex.
- Dual-atom catalysts (DACs) often show high CO selectivity, puzzling given theoretical predictions favoring CO hydrogenation over CO desorption.
- The influence of potential and hydrogen evolution reaction (HER) on selectivity remains unclear.
Purpose of the Study:
- To elucidate the origin of CO selectivity in CO2RR to CO on dual-atom catalysts (DACs).
- To investigate the role of CO coverage and applied potential in determining reaction pathways.
- To understand the competition between CO2RR and HER on DACs.
Main Methods:
- Ab initio molecular dynamics simulations.
- Potential-dependent kinetic evaluations using a "slow-growth" sampling method.
- Analysis of reaction pathways on a representative NC-based DAC (CuFe-N6-C).
Main Results:
- High CO coverage accelerates CO desorption kinetics while inhibiting CO hydrogenation.
- CO2RR selectivity to CO is favored at higher CO coverages.
- HER selectivity increases at lower potentials, but is suppressed by CO* coverage on CuFe-N6-C due to a lower energy barrier for *C bond cleavage.
Conclusions:
- The study resolves the long-standing puzzle of high CO selectivity in DACs for CO2RR.
- Catalyst design for enhanced CO2RR selectivity can be guided by understanding the interplay of CO coverage, potential, and competing reaction pathways.
- The findings provide critical insights for developing efficient electrocatalysts for CO2 conversion.
More Related Videos
08:40Synthesis 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
10:19Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
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...
01:12Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
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...
02:36Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
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.