We report a theoretical investigation of the adsorption and activation properties of CO2 on eight-atom 3d, 4d, and 5d transition-metal (TM) clusters based on density functional theory calculations. From our results and analyses, in the lowest energy configurations, CO2 binds via a chemisorption mechanism on Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt (adsorption energy from −0.49 eV on Pt up to −1.40 eV on Os), where CO2 breaks its linearity and adopts an angular configuration due to the charge transfer from the clusters toward the C atom in the adsorbed CO2. In contrast, it binds via physisorption on Cu, Ag, and Au and maintains its linearity due to a negligible charge transfer toward CO2 and has a small adsorption energy (from −0.17 eV on Cu up to −0.18 eV on Ag). There is an energetic preference for twofold bridge TM sites, which favors binding of C with two TM atoms, which enhances the charge transfer ten times than on the top TM sites (onefold). We identified that the strength of the CO2–TM8 interaction increases when the energy values of the highest occupied molecular orbital (HOMO) of the TM8 are closer to the energy values of the lowest unoccupied molecular orbital of CO2, which contributes to maximize the charge transfer toward the molecule. Beyond the energy position of the HOMO states, the delocalization of 5d orbitals plays an important role in the adsorption strength in TM, especially for the iron group, e.g., the adsorption energies are −1.08 eV (Fe, 3d), −1.19 eV (Ru, 4d), and −1.40 eV (Os, 5d).
Skip Nav Destination
Article navigation
28 March 2022
Research Article|
March 24 2022
Ab initio investigation of the role of the d-states on the adsorption and activation properties of CO2 on 3d, 4d, and 5d transition-metal clusters
Matheus N. Collacique;
Matheus N. Collacique
a)
São Carlos Institute of Chemistry, University of São Paulo
, P.O. Box 780, 13560-970 São Carlos, SP, Brazil
Search for other works by this author on:
Vivianne K. Ocampo-Restrepo;
Vivianne K. Ocampo-Restrepo
b)
São Carlos Institute of Chemistry, University of São Paulo
, P.O. Box 780, 13560-970 São Carlos, SP, Brazil
Search for other works by this author on:
Juarez L. F. Da Silva
Juarez L. F. Da Silva
c)
São Carlos Institute of Chemistry, University of São Paulo
, P.O. Box 780, 13560-970 São Carlos, SP, Brazil
c)Author to whom correspondence should be addressed: juarez_dasilva@iqsc.usp.br
Search for other works by this author on:
a)
E-mail: matheus.collacique@usp.br
b)
E-mail: vivianne.o.restrepo@gmail.com
c)Author to whom correspondence should be addressed: juarez_dasilva@iqsc.usp.br
J. Chem. Phys. 156, 124106 (2022)
Article history
Received:
January 15 2022
Accepted:
March 07 2022
Citation
Matheus N. Collacique, Vivianne K. Ocampo-Restrepo, Juarez L. F. Da Silva; Ab initio investigation of the role of the d-states on the adsorption and activation properties of CO2 on 3d, 4d, and 5d transition-metal clusters. J. Chem. Phys. 28 March 2022; 156 (12): 124106. https://doi.org/10.1063/5.0085364
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Pay-Per-View Access
$40.00
604
Views
Citing articles via
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.