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Single‐Atom Catalysts Supported by Crystalline Porous Materials: Views from the Inside

Journal Article · · Advanced Materials
 [1];  [2];  [2];  [3];  [2]
  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 P. R. China
  2. Department of Chemistry Dalhousie University Halifax Nova Scotia B3H 4R2 Canada
  3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 P. R. China, International Center of Future Science Jilin University 2699 Qianjin Street Changchun 130012 P. R. China

Abstract

Single‐atom catalysts (SACs) have recently emerged as an exciting system in heterogeneous catalysis showing outstanding performance in many catalytic reactions. Single‐atom catalytic sites alone are not stable and thus require stabilization from substrates. Crystalline porous materials such as zeolites and metal‐organic frameworks (MOFs) are excellent substrates for SACs, offering high stability with the potential to further enhance their performance due to synergistic effects. This review features recent work on the structure, electronic, and catalytic properties of zeolite and MOF‐protected SACs, offering atomic‐scale views from the “inside” thanks to the subatomic resolution of synchrotron X‐ray absorption spectroscopy (XAS). The extended X‐ray absorption fine structure and associated methods will be shown to be powerful tools in identifying the single‐atom site and can provide details into the coordination environment and bonding disorder of SACs. The X‐ray absorption near‐edge structure will be demonstrated as a valuable method in probing the electronic properties of SACs by analyzing the white line intensity, absorption edge shift, and pre‐/postedge features. Emphasis is also placed on in situ/operando XAS using state‐of‐the‐art equipment, which can unveil the changes in structure and properties of SACs during the dynamic catalytic processes in a highly sensitive and time‐resolved manner.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1638291
Alternate ID(s):
OSTI ID: 1712479
OSTI ID: 1763150
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 44 Vol. 32; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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