Ab Initio Calculation of Rate Constants for Molecule-Surface Reactions with Chemical Accuracy.

ABSTRACT: The ab initio prediction of reaction rate constants for systems with hundreds of atoms with an accuracy that is comparable to experiment is a challenge for computational quantum chemistry. We present a divide-and-conquer strategy that departs from the potential energy surfaces obtained by standard density functional theory with inclusion of dispersion. The energies of the reactant and transition structures are refined by wavefunction-type calculations for the reaction site. Thermal effects and entropies are calculated from vibrational partition functions, and the anharmonic frequencies are calculated separately for each vibrational mode. This method is applied to a key reaction of an industrially relevant catalytic process, the methylation of small alkenes over zeolites. The calculated rea

SUBMITTER: Piccini G 

PROVIDER: S-EPMC4834608 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature