Publication detail

Atomically Dispersed Dopants for Stabilizing Ceria Surface Area

ALCALA, R. DELARIVA, A. PETERSON, E. J. BENAVIDEZ, A. GARCIA-VARGAS, C. E. JIANG, D. PEREIRA-HERNÁNDEZ, X. I. BRONGERSMA, H. H. VEEN, R. T. STANĚK, J. MILLER, J. T. WANG, Y. DATYE, A.

English title

Atomically Dispersed Dopants for Stabilizing Ceria Surface Area

Type

journal article in Web of Science

Language

en

Original abstract

Ceria is known to be a very good catalyst as well as a support for oxygen transfer (oxidation) as well as for hydrogen transfer (hydrogenation and dehydrogenation) reactions. Many of these reactions occur at high temperatures where ceria is known to sinter, leading to loss of surface area. The thermal stability of ceria can be improved by the addition of dopants, but the location of the dopant atoms and the mechanisms by which ceria stabilization occurs are poorly understood. We show here that dopants located on the surface of ceria are remarkably effective at stabilizing ceria surface area. Keeping metal loading constant at 0.88 mol%, we found that surface area of the ceria aged at 800 degrees C in air for 5 h ranged from 45 m(2)/g to 2 m(2)/g. Strongly bound dopants in atomically dispersed form help to pin surface sites and lower the mobility of ceria.

English abstract

Ceria is known to be a very good catalyst as well as a support for oxygen transfer (oxidation) as well as for hydrogen transfer (hydrogenation and dehydrogenation) reactions. Many of these reactions occur at high temperatures where ceria is known to sinter, leading to loss of surface area. The thermal stability of ceria can be improved by the addition of dopants, but the location of the dopant atoms and the mechanisms by which ceria stabilization occurs are poorly understood. We show here that dopants located on the surface of ceria are remarkably effective at stabilizing ceria surface area. Keeping metal loading constant at 0.88 mol%, we found that surface area of the ceria aged at 800 degrees C in air for 5 h ranged from 45 m(2)/g to 2 m(2)/g. Strongly bound dopants in atomically dispersed form help to pin surface sites and lower the mobility of ceria.

Keywords in English

Thermal stability; sintering; cerium oxide; single atom catalyst; surface mobility

Released

05.05.2021

Publisher

ELSEVIER

Location

AMSTERDAM

ISSN

0926-3373

Volume

284

Number

1

Pages from–to

1–9

Pages count

9

BIBTEX


@article{BUT172567,
  author="Jan {Staněk},
  title="Atomically Dispersed Dopants for Stabilizing Ceria Surface Area",
  year="2021",
  volume="284",
  number="1",
  month="May",
  pages="1--9",
  publisher="ELSEVIER",
  address="AMSTERDAM",
  issn="0926-3373"
}