Related Experiment Video
Updated: Dec 14, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Computational mechanistic investigation of the Fe + CO2→ FeO + CO reaction
Eduardo Dias Vicentini1, Ana P de Lima Batista, Antonio G Sampaio de Oliveira-Filho
1Departamento de Química, Laboratório Computacional de Espectroscopia e Cinética, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto-SP, Brazil. antoniogsof@ffcrp.usp.br.
Abstract:
We report a computational study of the mechanism and determination of the rate constants of the Fe + CO2→ FeO + CO reaction, in the 1000-3000 K temperature range, at the CCSD(T)/CBS//B3LYP/def2-TZVP level of theory. The overall rate constant was obtained by a Kinetic Monte Carlo simulation. The calculated rate constant, at 2000 K, is 9.72 × 10-13 cm3 molecule-1 s-1, in agreement with experimental measurements: 2.97 × 10-13 cm3 molecule-1 s-1 [A. Giesen et al., Phys. Chem. Chem. Phys., 2002, 4, 3665] and 1.13 × 10-13 cm3 molecule-1 s-1 [V. N. Smirnov, Kinet. Catal., 2008, 49, 607]. Our study shows that this reaction follows a complex mechanism, with multiple reaction paths contributing to the overall rate, and that CCSD(T) accurately describes this transition metal reaction.
Related Concept Videos
E2 Reaction: Kinetics and Mechanism
E1 Reaction: Kinetics and Mechanism
Reaction Mechanisms
For instance, the decomposition of ozone appears to follow a mechanism with two steps:
Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...
Factors Influencing the Rate of Chemical Reactions
Concentration and Pressure:
The more particles present within a given space, the more likely those particles are to bump into one another....
Temperature Dependence on Reaction Rate
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...

