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Automatisierte Generierung von Mikrokinetiken für heterogen katalysierte Reaktionen unter Berücksichtigung korrelierter Unsicherheiten**

Journal Article · · Angewandte Chemie
 [1];  [2];  [3];  [4];  [2];  [5]
  1. School of Engineering Brown University 184 Hope Street Providence RI 02912 USA, Institute for Chemical Technology and Polymer Chemistry Karlsruhe Institute of Technology Engesserstr. 20 76128 Karlsruhe Deutschland
  2. Institute for Chemical Technology and Polymer Chemistry Karlsruhe Institute of Technology Engesserstr. 20 76128 Karlsruhe Deutschland
  3. Institute for Chemical Technology and Polymer Chemistry Karlsruhe Institute of Technology Engesserstr. 20 76128 Karlsruhe Deutschland, Institute of Catalysis Research and Technology Karlsruhe Institute of Technology 76344 Eggenstein-Leopoldshafen Deutschland
  4. School of Chemical and Biomolecular Engineering Atlanta GA 30318 USA
  5. School of Engineering Brown University 184 Hope Street Providence RI 02912 USA
Abstract

Die Studie stellt eine ab initio basierte Methode für die automatische Konstruktion von detaillierten Mikrokinetiken vor, welche korrelierte Unsicherheiten in allen energetischen Parametern und Schätzroutinen berücksichtigt. Hierfür wurden innerhalb des Unsicherheitsraums des BEEF‐vdW Funktionals 2000 Mikrokinetiken für die Oxidationsreaktionen repräsentativer Abgasemissionen von stöchiometrischen Verbrennungsmotoren auf Pt(111) generiert und durch Multiskalenmodellierung mit Experimenten verglichen. Das Ensemble der Simulationsergebnisse unterstreicht die Bedeutung der Berücksichtigung von Unsicherheiten. Innerhalb dieses Ensembles ist es möglich, eine Mikrokinetik zu identifizieren, welche mit den experimentellen Daten übereinstimmt. Diese Mikrokinetik lässt sich auf ein einziges Austausch‐Korrelations‐Funktional zurückführen und legt nahe, dass Pt(111) das aktive Zentrum für die Oxidation leichter Kohlenwasserstoffe sein könnte. Die Studie bietet einen universellen Rahmen für die automatisierte Konstruktion von Reaktionsmechanismen unter Berücksichtigung korrelierter Unsicherheiten und ermöglicht eine DFT‐basierte Optimierung der Mikrokinetik auch für andere heterogen katalysierte Systeme.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0019441
OSTI ID:
1996313
Alternate ID(s):
OSTI ID: 1996314
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 39 Vol. 135; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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