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Size effect of metal–organic frameworks with iron single-atom catalysts on oxygen–reduction reactions

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(6), pp.1349-1355
  • DOI : 10.1007/s42823-021-00292-9
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : September 2, 2021
  • Accepted : October 5, 2021
  • Published : December 1, 2021

Lee Seon Yeong 1 Jang Han Wool 2 Lee Hae Ri 1 Joh Han-Ik 1

1건국대학교
2조한익

Accredited

ABSTRACT

Metal–organic frameworks (MOFs) are widely used as supports for single-atom catalysts (SACs) owing to their high specifc surface area, porosity, and ordered metal–ligand structure. Their activity can be increased by increasing the number of electrochemically accessible active sites via the formation of atomically dispersed metal catalysts (M–Nx) that coordinate with nitrogen atoms on the MOF. Herein, we introduce the relationship between the size of the MOF as a starting material and the catalytic activity for the oxygen reduction reaction in alkaline media. The morphology and features of the MOFs are critically dependent on their size. Remarkably, cage-like MOFs below 33 nm are converted into collapsed structures and are connected between each MOF, even carbon fber- or tube-like features, after carbonization. SACs derived from medium-sized MOFs exhibit excellent activity and are comparable to commercial Pt/C catalysts owing to their porous structure. Therefore, we believed that controlling the size of MOFs containing active atoms is an efective method of modulating the morphological properties of the support and even the number of active sites that are closely related to the activity.

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2023-07-13)

Total Citation Counts(KCI+WOS) (11) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (10) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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