Discovering surface reaction pathways using accelerated molecular dynamics and network analysis tools. Issue 36 (17th August 2022)

• Record Type: Journal Article
• Authors: Hirai, Hirotoshi; Jinnouchi, Ryosuke
• Is Part Of: RSC advances. Volume 12:Issue 36(2022)
• Page Start: 23274
• Page End: 23283
• Publication Date: 2022-08-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra04343b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We present an automated method that maps surface reaction pathways with no experimental data and with minimal human interventions. Abstract : We present an automated method that maps surface reaction pathways with no experimental data and with minimal human interventions. In this method, bias potentials promoting surface reactions are applied to enable statistical samplings of the surface reaction within the timescale of ab initio molecular dynamics (MD) simulations, and elementary reactions are extracted automatically using an extension of the method constructed for gas- or liquid-phase reactions. By converting the extracted elementary reaction data to directed graph data, MD trajectories can be efficiently mapped onto reaction pathways using a network analysis tool. To demonstrate the power of the method, it was applied to the steam reforming of methane on the Rh(111) surface and to propane reforming on the Pt(111) and Pt3 Sn(111) surfaces. We discover new energetically favorable pathways for both reactions and reproduce the experimentally-observed materials-dependence of the surface reaction activity and the selectivity for the propane reforming reactions.