Nanoceria: Factors affecting its pro- and anti-oxidant properties

Eric Grulke, Kenneth Reed, Matthew Beck, Xing Huang, Alastair Cormack, Sudipta Seal

Research output: Contribution to journalReview articlepeer-review

128 Scopus citations


Nanoceria redox properties are affected by particle size, particle shape, surface chemistry, and other factors, such as additives that coat the surface, local pH, and ligands that can participate in redox reactions. Each CeO2 crystal facet has a different chemistry, surface energy, and surface reactivity. Unlike nanoceria's industrial catalytic applications, biological and environment exposures are characterized by high water activity values and relatively high oxygen activity values. Electrochemical data show that oxygen levels, pH, and redox species affect its phase equilibria for solution and dissolution. However, not much is known about how the many and varied redox ligands in environmental and biological systems might affect nanoceria's redox behaviour, the effects of coated surfaces on redox rates and mechanisms, and whether the ceria solid phase undergoes dissolution at physiologically relevant pH and oxygen levels. Research that could answer these questions would improve our understanding of the links between nanoceria's redox performance and its morphology and environmental conditions in the local milieu.

Original languageEnglish
Pages (from-to)429-444
Number of pages16
JournalEnvironmental Science: Nano
Issue number5
StatePublished - Oct 1 2014

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Environmental Science (all)


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