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Enhanced selective catalytic reduction of NO x with NH 3 over homoatomic dinuclear sites in defective α-Fe 2 O 3

Chemical Engineering Journal, ISSN: 1385-8947, Vol: 426, Page: 131845
2021
  • 24
    Citations
  • 0
    Usage
  • 4
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    24
    • Citation Indexes
      24
  • Captures
    4

Article Description

Catalytic reactions that require more than one active sites are popular, such as selective catalytic reduction of NO x with NH 3 (NH 3 -SCR) for the elimination of NO x contaminant containing redox and acid dinuclear sites. Doping/supporting other elements is a general strategy for introduction of the one that catalysts lack. Herein, we prepared a highly defective α-Fe 2 O 3 with enhanced acid (Lewis and Brønsted) and redox properties on homoatomic dinuclear sites comprising more positively charged Fe 3+ and oxygen vacancy-coupled Fe 2+ ions. The NH 3 -SCR activity is improved at lower temperature without adding another acid transition metal. Furthermore, the significant amounts of Brønsted acid provide precaution against the poisoning of H 2 O and SO 2. This work greatly broadened applicability of the state of the art concept of dinuclear sites for NH 3 -SCR and open a new avenue to enhance activity via defective engineering for a single metal oxide.

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