Low pressure induced porous nanorods of ceria with high reducibility and large oxygen storage capacity: Synthesis and catalytic applications

Jing Li, Zhiyun Zhang, Zhimin Tian, Xuemei Zhou, Zhiping Zheng, Yuanyuan Ma, Yongquan Qu

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Ceria (CeO2) is finding prolific industrial applications due to its unique redox properties. Such properties, dominated by structural defects that are primarily oxygen vacancies associated with the Ce3+/Ce4+ redox couple, can be modulated and optimized by controlling the size and morphology of the material, in particular those that are nanostructured (nanoceria). We report herein a new form of nanoceria prepared by a two-step hydrothermal synthesis. In the first-step hydrothermal treatment, the low reaction pressure is critical for the formation of a Ce(OH)3/CeO2 precursor. A subsequent hydrothermal step of dehydration and oxidation of the precursor nanorods led to the production of porous nanorods of ceria. The porous nanorods of ceria have been found to display enhanced reducibility and capacity for oxygen storage (900.2 μmol O2 per g) as a result of their significantly increased surface area and defects over other forms of nanoceria, including nanoparticles, non-porous nanorods, nanocubes, and nanooctahedra. Their much improved activities have also been demonstrated in a benchmark reaction-catalytic oxidation of CO. The high catalytic activity of porous nanorods of ceria indicates their potential as the catalysts or supports or promoters for advanced oxidative processes for waste treatment and environmental remediation. This journal is

Original languageEnglish (US)
Pages (from-to)16459-16466
Number of pages8
JournalJournal of Materials Chemistry A
Volume2
Issue number39
DOIs
StatePublished - Oct 21 2014

Fingerprint

Cerium compounds
Nanorods
Oxygen
Defects
Waste treatment
Catalytic oxidation
Hydrothermal synthesis
Oxygen vacancies
Carbon Monoxide
Dehydration
Catalyst supports
Industrial applications
Catalyst activity
Nanoparticles
Oxidation
Catalysts
ceric oxide
Oxidation-Reduction

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Low pressure induced porous nanorods of ceria with high reducibility and large oxygen storage capacity : Synthesis and catalytic applications. / Li, Jing; Zhang, Zhiyun; Tian, Zhimin; Zhou, Xuemei; Zheng, Zhiping; Ma, Yuanyuan; Qu, Yongquan.

In: Journal of Materials Chemistry A, Vol. 2, No. 39, 21.10.2014, p. 16459-16466.

Research output: Contribution to journalArticle

Li, Jing ; Zhang, Zhiyun ; Tian, Zhimin ; Zhou, Xuemei ; Zheng, Zhiping ; Ma, Yuanyuan ; Qu, Yongquan. / Low pressure induced porous nanorods of ceria with high reducibility and large oxygen storage capacity : Synthesis and catalytic applications. In: Journal of Materials Chemistry A. 2014 ; Vol. 2, No. 39. pp. 16459-16466.
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