CO2 dissociative sticking on Cu(110)
Federico J Gonzalez1, Carmen A Tachino1,2, H Fabio Busnengo1,2
1Grupo de Fisicoquímica en Interfaces y Nanoestructuras, Instituto de Física Rosario (IFIR), CONICET-UNR, Bv. 27 de Febrero 210 bis, S2000EKF Rosario, Argentina.
The Journal of Chemical Physics
|June 4, 2026
Summary
High-energy carbon dioxide (CO2) molecules interacting with copper surfaces can cause significant surface distortions and create novel structures. This finding may explain experimental observations of oxygen coverage saturation at higher impact energies.
Area of Science:
- Surface science
- Chemical dynamics
- Computational chemistry
Background:
- Understanding gas-surface interactions is crucial for catalysis and materials science.
- Carbon dioxide (CO2) dissociation on metal surfaces is a key process in many chemical reactions.
- Previous studies have explored CO2 adsorption on copper, but dynamics at high impact energies remain less understood.
Purpose of the Study:
- Investigate the dynamics of carbon dioxide (CO2) interacting with a copper (Cu(110)) surface.
- Explore the influence of translational energy and surface temperature on CO2 adsorption and dissociation.
- Analyze the impact of high-energy CO2 dissociation on the copper surface structure.
Main Methods:
- Quasi-classical trajectory (QCT) calculations.
- Artificial neural network (ANN) potential parameterized from ab initio calculations.
- Comparison with supersonic molecular beam experimental data.
Main Results:
- Calculated adsorption probabilities qualitatively agree with experimental results.
- High impact energy (above ~2.5 eV) and elevated temperatures induce significant surface distortions.
- Formation of copper adatoms, vacancy-adatom pairs, and unusual (O-Cu-CO)ads linear moieties were observed.
- Dissociation products strongly interact with the copper surface, leading to structural modifications.
Conclusions:
- CO2 dissociation at high impact energies and near room temperature leads to substantial surface restructuring on Cu(110).
- The observed surface distortions, including adatom formation, may explain experimental findings of saturated oxygen coverage for high-energy CO2.
- This study provides insights into the complex interplay between molecular dynamics and surface reactivity at the atomic level.
Related Concept Videos
01:04¹³C NMR: ¹H–¹³C Decoupling
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
01:12Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
02:10Carbocations
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
02:39Phase Diagrams
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
01:16Cycloaddition Reactions: MO Requirements for Thermal Activation
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.