Enhanced Ceria Nanoflakes using Graphene Oxide as a Sacrificial Template for CO Oxidation and Dry Reforming of Methane

Shawn Rood, Huseyin Ahmet, Anais Gomez-Ramon, Laura Torrente-Murciano, Tomas Reina, Salvador Eslava

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The development of novel fabrication methods to produce ceria catalysts with good high-temperature stability is critical for their implementation across a range of different applications. Herein, graphene oxide flakes are used as a sacrificial template in the synthesis of ceria particles to replicate the graphene oxide’s two-dimensionality. While performing the synthesis without graphene oxide results in large agglomerations of ceria crystallites, the addition of graphene oxide during the synthesis results in ceria nanoflakes (<10 nm) replicating the graphene oxide morphology. This novel shape limits the diffusion of atoms at high temperature to a two-dimensional plane which is translated into a low sintering degree and consequently, an enhanced thermal stability. In this way, the ceria flakes are capable of maintaining high surface areas after calcination at high temperatures (>400 °C) which results in improved catalytic performance for the oxidation of carbon monoxide. This resistance versus sintering has also a beneficial effect when ceria flakes are used as catalytic support of nickel particles. Improved metal dispersion and high metal-support interaction leads to lower sintering during the dry reforming of methane than similarly prepared un-templated ceria nickel catalysts. These results demonstrate the advantage of using graphene oxide as a sacrificial template for the production of sintering-resistant catalysts with good catalytic performance at high temperatures.
LanguageEnglish
Pages358-368
Number of pages11
JournalApplied Catalysis B: Environmental
Volume242
Early online date9 Oct 2018
DOIs
StatusPublished - 1 Mar 2019

Keywords

  • CO oxidation
  • Ceria
  • Dry methane reforming
  • Graphene oxide
  • Template

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Cite this

Enhanced Ceria Nanoflakes using Graphene Oxide as a Sacrificial Template for CO Oxidation and Dry Reforming of Methane. / Rood, Shawn; Ahmet, Huseyin; Gomez-Ramon, Anais; Torrente-Murciano, Laura; Reina, Tomas; Eslava, Salvador.

In: Applied Catalysis B: Environmental, Vol. 242, 01.03.2019, p. 358-368.

Research output: Contribution to journalArticle

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