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author:

Zheng, X. (Zheng, X..) [1] | Li, B. (Li, B..) [2] | Shen, L. (Shen, L..) [3] | Cao, Y. (Cao, Y..) [4] | Zhan, Y. (Zhan, Y..) [5] | Zheng, S. (Zheng, S..) [6] | Wang, S. (Wang, S..) [7] | Jiang, L. (Jiang, L..) [8]

Indexed by:

Scopus

Abstract:

Fe-doped LaCoO3 perovskite catalysts synthesized via a facile citric acid-assisted sol-gel route have been applied for the H2S selective oxidation. The as-synthesized LaFexCo1−xO3 perovskites exhibit a randomly macroporous structure formed by the accumulation of nanoparticles. Characterization studies reveal that appropriate Fe substitution effectively enhances the formation of oxygen vacancies, and thus improves the lattice oxygen mobility and H2S adsorbability, respectively. The obtained LaFe0.4Co0.6O3 exhibited remarkable catalytic activity, with the H2S conversion and sulfur yield of 100% at 190 °C. A combined approach of in-situ FT-IR and in-situ Raman experiments disclosed that the plausible reaction pathway of H2S selective oxidation over LaFexCo1−xO3 perovskites follows the Mars-van Krevelen mechanism. The density functional theory calculations revealed that Fe-doping improves the formation of oxygen vacancy and enhances the adsorption of H2S. This study offers new insights for the design of highly efficient perovskites for the selective oxidation of H2S. © 2023 Elsevier B.V.

Keyword:

Density functional theory Fe doped H2S selective oxidation LaCoO3 perovskite Oxygen vacancy

Community:

  • [ 1 ] [Zheng, X.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian, Fuzhou, 350002, China
  • [ 2 ] [Zheng, X.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
  • [ 3 ] [Li, B.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian, Fuzhou, 350002, China
  • [ 4 ] [Shen, L.]College of Environmental Science and Engineering, Fujian Normal University, Fujian, Fuzhou, 350007, China
  • [ 5 ] [Cao, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian, Fuzhou, 350002, China
  • [ 6 ] [Cao, Y.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
  • [ 7 ] [Zhan, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian, Fuzhou, 350002, China
  • [ 8 ] [Zhan, Y.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
  • [ 9 ] [Zheng, S.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian, Fuzhou, 350108, China
  • [ 10 ] [Wang, S.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian, Fuzhou, 350002, China
  • [ 11 ] [Wang, S.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
  • [ 12 ] [Jiang, L.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian, Fuzhou, 350002, China
  • [ 13 ] [Jiang, L.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China

Reprint 's Address:

  • [Cao, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst, Fujian, China;;[Zheng, S.]State Key Laboratory of Photocatalysis on Energy and Environment, Fujian, China

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Source :

Applied Catalysis B: Environmental

ISSN: 0926-3373

Year: 2023

Volume: 329

2 0 . 3

JCR@2023

2 0 . 3 0 0

JCR@2023

ESI HC Threshold:39

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 41

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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