• norsk
    • English
  • norsk 
    • norsk
    • English
  • Logg inn
Vis innførsel 
  •   Hjem
  • Øvrige samlinger
  • Publikasjoner fra CRIStin - NTNU
  • Vis innførsel
  •   Hjem
  • Øvrige samlinger
  • Publikasjoner fra CRIStin - NTNU
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Effects of Oxygen Mobility in La-Fe-Based Perovskites on the Catalytic Activity and Selectivity of Methane Oxidation

Chang, Hui; Bjørgum, Erlend; Mihai, Oana; Yang, Jie; Lein, Hilde Lea; Grande, Tor; Raaen, Steinar; Zhu, Yi-an; Holmen, Anders; Chen, De
Peer reviewed, Journal article
Accepted version
Thumbnail
Åpne
Chang.pdf (2.688Mb)
Permanent lenke
https://hdl.handle.net/11250/2730107
Utgivelsesdato
2020
Metadata
Vis full innførsel
Samlinger
  • Institutt for fysikk [2156]
  • Institutt for kjemisk prosessteknologi [1427]
  • Institutt for materialteknologi [1986]
  • Publikasjoner fra CRIStin - NTNU [26648]
Originalversjon
ACS Catalysis. 2020, 10 (6), 3707-3719.   https://doi.org/10.1021/acscatal.9b05154
Sammendrag
The mechanism and structure requirements of selective and total oxidation of methane in a chemical looping process are both experimentally and theoretically examined on La1–xSrxFeO3−δ (x = 0, 0.2, and 0.5) and La0.5Sr0.5Fe1–xCoxO3−δ (x = 0.5 and 1) perovskites. The oxygen mobility in the perovskites described by the formation energy of oxygen vacancy is found to have a pronounced effect on the catalytic activity and selectivity. In particular, the selectivity is controlled largely by the surface oxygen concentration or the oxygen vacancy concentration on perovskites, which depends strongly on the bulk oxygen concentration and the relative rate of the lattice oxygen diffusion with respect to the surface reaction. The substitution of Sr for La at the A site and the substitution of Co for Fe at the B site of the ABO3 perovskites dramatically increase the oxygen mobility. A higher oxygen diffusion rate, and hence enrichment of oxygen on the surface, would improve the catalyst selectivity toward total oxidation.
Utgiver
American Chemical Society
Tidsskrift
ACS Catalysis

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit
 

 

Bla i

Hele arkivetDelarkiv og samlingerUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifterDenne samlingenUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifter

Min side

Logg inn

Statistikk

Besøksstatistikk

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit