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Title: Accelerated Computational Analysis of Metal–Organic Frameworks for Oxidation Catalysis

Journal Article · · Journal of Physical Chemistry. C
 [1];  [1];  [2];  [3];  [1];  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

High-spin iron(IV)–oxo compounds are known to activate strong C–H bonds. Stabilizing the high-spin S = 2 electronic configuration is difficult in molecular species for homogeneous catalysis, but recent experimental and computational results suggest this can be achieved in the metal–organic framework Fe2(dobdc) (dobdc4– = 2,5-dioxido-1,4-benzenedicarboxylate) and its magnesium-diluted analogues. With a novel computational screening approach, we have identified three additional frameworks that are predicted to form high-spin iron(IV)–oxo species upon dissociative adsorption of nitrous oxide. The computational work is supported by follow-up experiments which show that, among these three materials, Fe-BTT (BTT3– = 1,3,5-benzenetristetrazolate) selectively oxidizes ethane to ethanol at 120 °C. Subsequent spectroscopic and cycling studies suggest that framework defects, rather than the bulk framework or extraframework sites, are likely responsible for the observed reactivity. Furthermore, this work shows how computational methods can be used to rapidly identify promising candidate frameworks, and highlights the need for new methods that allow defect sites in metal–organic frameworks to be better understood and exploited for catalysis.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
FG02-12ER16362; SC0008688
OSTI ID:
1326100
Journal Information:
Journal of Physical Chemistry. C, Vol. 120, Issue 33; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (7)

Defective Metal-Organic Frameworks journal January 2018
Metal–organic and covalent organic frameworks as single-site catalysts journal January 2017
Efficiently Exploring Adsorption Space to Identify Privileged Adsorbents for Chemical Separations of a Diverse Set of Molecules journal April 2018
Tuning the balance between dispersion and entropy to design temperature-responsive flexible metal-organic frameworks journal November 2018
Identifying promising metal–organic frameworks for heterogeneous catalysis via high‐throughput periodic density functional theory journal February 2019
Computational Approach to Molecular Catalysis by 3d Transition Metals: Challenges and Opportunities journal October 2018
Excavating hidden adsorption sites in metal-organic frameworks using rational defect engineering journal November 2017