Tailoring CO2 adsorption and activation properties of ceria nanocubes by coating with nanometre-thick yttria layers

  1. Barroso Bogeat, Adrián
  2. Blanco, Ginesa
  3. Pintado, José María
  4. Goma, Daniel
  5. Calvino Gámez, José Juan
  1. 1 Universidad de Cádiz
    info

    Universidad de Cádiz

    Cádiz, España

    ROR https://ror.org/04mxxkb11

  2. 2 Universidad de Salamanca
    info

    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

Zeitschrift:
Surfaces and Interfaces

ISSN: 2468-0230

Datum der Publikation: 2021

Ausgabe: 26

Seiten: 101353

Art: Artikel

DOI: 10.1016/J.SURFIN.2021.101353 GOOGLE SCHOLAR lock_openOpen Access editor

Andere Publikationen in: Surfaces and Interfaces

Zusammenfassung

Ceria (CeO2) is a ubiquitous component in catalysts for environmental protection processes, especially those devoted to CO2 valorisation. Aimed at preparing ceria-based nanomaterials with enhanced CO2 adsorption and activation properties, both the surface acid-base and redox features of ceria nanocubes were modulated by a novel, simple, wet chemistry synthetic strategy consisting of their coating with yttria (Y2O3) layers of variable thickness in the nanometre scale. The as-synthesised samples were characterised with special attention to their surface basicity and reducibility. Characterisation results revealed that the surface doping with yttria not only improved both the reducibility at low temperature and CO2 adsorption capacity of ceria nanocubes, but also introduced a variety of basic sites with different strength. Finally, the careful control of the yttria layer thickness allowed to modulate these effects and thereby the ability of nanostructured ceria to adsorb and activate the CO2 molecule.

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