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Polyoxometalate Reduced Graphene Oxide Hybrid Catalyst: Synthesis, Structure, and Electrochemical Properties

Title
Polyoxometalate Reduced Graphene Oxide Hybrid Catalyst: Synthesis, Structure, and Electrochemical Properties
Authors
Kim, YongShanmugam, Sangaraju
DGIST Authors
Shanmugam, Sangaraju
Issue Date
2013-11
Citation
ACS Applied Materials and Interfaces, 5(22), 12197-12204
Type
Article
Article Type
Article
Keywords
Atomic Force MicroscopyCatalyst ActivityCyclic VoltammetryElectrochemical ActivitiesElectrochemical ActivityElectrochemical PropertiesElectronic StructureElectrooxidationGrapheneHeterogeneous CatalystKeggin-TypeKeggin TypeNitrite OxidationNitrite OxidationsOxidesPolyoxometalatePolyoxometalatesReduced-Graphene OxideReduced-Graphene OxidesSpectroscopic Analysis
ISSN
1944-8244
Abstract
The deposition of polyoxometalate (POM) on chemically reduced graphene oxide sheets was carried out through electron transfer interaction and electrostatic interaction between POM and graphene sheets to make a heterogeneous catalyst in aqueous media. Well dispersed individual phosphomolybdic acid (PMo) clusters were observed by electron microscopy and atomic force microscopy measurements. The interaction between polyoxometalate and the graphene sheet was confirmed by using various spectroscopic methods such as FT-IR, UV-vis, and Raman. The UV-visible, IR, and cyclic voltammetry results revealed alteration of the electronic structure of deposited PMo as a result of strong interaction with the graphene oxide surface. Electrochemical properties of the PMo-rGO catalyst were investigated in an aqueous acidic electrolyte. The hybrid catalyst showed enhanced electro-oxidation of nitrite compared with pure homogeneous PMo and rGO. © 2013 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/3177
DOI
10.1021/am4043245
Publisher
American Chemical Society
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
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Collection:
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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