Header menu link for other important links
X
Novel nanostructured CeO2 as efficient catalyst for energy and environmental applications
Published in Indian Academy of Sciences
2014
Volume: 126
   
Issue: 2
Pages: 361 - 372
Abstract
We report here versatile methods to engineer the microstructure and understand the fundamental physicochemical properties of CeO2 to improve its catalytic viability for practical applications. In this context, different morphologies of CeO2 are synthesized using tailored homogeneous precipitation methods and characterized by XRD, BET, SEM and TPR methods. The shuttle-shaped CeO2 prepared under hydrothermal condition shows higher surface area and low-temperature reducibility. The 0.5 wt% Pt-impregnated shuttle-shaped CeO2 shows lower-temperature CO oxidation behaviour as compared to its bulk-like CeO2 (with 0.5 wt% Pt) counterpart, synthesized by conventional-reflux method. Further, nanorod morphology of CeO2 prepared with Cl- as counter ion shows lower-temperature oxidation of soot as compared to the mesoflower morphology of CeO2, prepared with NO 3-3 as counter ion in the reaction medium. Further, linear sweep voltammetry, chronopotentiometry and CO-stripping voltammetry studies are performed to evaluate the promoting activity of CeO 2 to Pt/C for ethanol electro-oxidation reaction in acidic media. Results show that CeO2 provides active triple-phase-interfacial sites for suitable adsorption of OH species which effectively oxidize the CO ads on Pt/C. The results presented here are significant in the context of understanding the physicochemical fine prints of CeO2 and CeO2 based hetero-nanocomposites for their suitability to important catalytic and energy-related applications. © 2014 Indian Academy of Sciences.
About the journal
JournalJournal of Chemical Sciences
PublisherIndian Academy of Sciences
ISSN09743626
Open AccessYes
Concepts (17)
  •  related image
    Catalysis
  •  related image
    Electrooxidation
  •  related image
    Ethanol
  •  related image
    Morphology
  •  related image
    Nanorods
  •  related image
    Platinum
  •  related image
    Platinum alloys
  •  related image
    Precipitation (chemical)
  •  related image
    Soot
  •  related image
    CO OXIDATION
  •  related image
    Environmental applications
  •  related image
    ETHANOL ELECTRO-OXIDATION
  •  related image
    HOMOGENEOUS PRECIPITATION METHOD
  •  related image
    Linear sweep voltammetry
  •  related image
    LOW-TEMPERATURE REDUCIBILITIES
  •  related image
    SOOT OXIDATION
  •  related image
    Oxidation