Molecular Dynamics Study of Molecular and Dissociative Adsorption Using System-Specific Force Fields Based on Ab Initio Calculations: CO/Cu(110) and CH4/Pt(110)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usep

We present results of quasi-classical trajectory (QCT) calculations of the molecular and dissociative sticking probability of CO on Cu(110), and of CH4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {CH}_4$$\end{document} on Pt(110)-(2 × 1) respectively. Our QCT calculations make use of reactive force fields (RFF) specifically developed for the systems/processes of interest by fitting of a large set of Density Functional Theory (DFT) total energy data. Through these two selected examples of great importance for a deep understanding of relevant chemical reactions on metal surfaces, we illustrate the potentiality of QCT calculations based on accurate RFFs built on ab initio data.