Unravelling the promotional effect of Nb and Mo on VOx-based catalysts for NOx reduction with NH3

Yeon Jae Park, Dong Ho Kim, Jung Hyun Lee, Heon Phil Ha, Dong Wook Kwon

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A series of VxNbMoTi for the selective catalytic reduction (SCR) of NO by NH3 have been synthesized to improve the SCR performance at low temperatures and the SO2 durability of vanadium-based catalysts. In this study, Nb and Mo were selected as promoters for vanadium-based catalysts in the SCR reaction, and the introduction of an appropriate amount of Nb-Mo enhanced the activity and SO2 durability at low temperatures. With the addition of Nb and/or Mo, physicochemical analysis was performed to characterize of the catalysts. The introduction of Nb-Mo into VTi increased the total amount of NH3 adsorption and improved the Vn+ (n = 3, 4) fraction. In addition, the number of oxygen vacancies and the amount of labile oxygen increased. Thus, introducing Nb-Mo into VTi increased SCR performance and enhanced resistance to SO2 and H2O in the presence of SO2 and H2O by reducing the affinity between SO2 and the catalytic surface.

Original languageEnglish
Article number156072
JournalApplied Surface Science
Volume614
DOIs
Publication statusPublished - 2023 Mar 30

Bibliographical note

Funding Information:
This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20217010100110). We are grateful to the Korea Institute of Science and Technology (KIST) for supporting this project through Atmospheric Environment Research program, Future R&D program, and Interfacial Engineering for Catalytic Solids (K-Lab) program.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Low-temperature
  • Molybdenum
  • NH-SCR
  • Niobium
  • SO-resistance
  • V-based catalyst

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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