Facile Regeneration Strategy for Facet-Controlled Nanocatalysts via the Dissolution-Reprecipitation Process Promoted by an Organic Modifier

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Abstract

Highly active facet-controlled nanocatalysts deteriorate readily via surface-atom migration during their use. This study develops a method for regenerating a degraded facet-controlled nanoparticle catalyst by reorientation of surface crystalline structure via the dissolution-reprecipitation process using an organic modifier. The supercritical hydrothermal treatment with the carboxylic acid modifier changes the CeO2 nanoparticles morphology to cubic-like over time to expose the (100) facet. This morphological transformation dynamics suggests that the modifier not only stabilizes the (100) facet but also accelerates the dissolution-reprecipitation process, promoting facet modification and catalyst regeneration. The facet-controlled nanocatalyst regeneration is verified experimentally by the recovery of oxygen storage capacity in the CeO2 nanoparticle, which is an indicator of the catalytic activity.

Original languageEnglish
Pages (from-to)7780-7784
Number of pages5
JournalChemistry of Materials
Volume33
Issue number19
DOIs
Publication statusPublished - 2021 Oct 12

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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