Synthesis of a carbon-coated NiO/MgO core/shell nanocomposite as a Pd electro-catalyst support for ethanol oxidation

C. Mahendiran, T. Maiyalagan, K. Scott, A. Gedanken

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59 Scopus citations

Abstract

Carbon coated on NiO/MgO in a core/shell nanostructure was synthesized by the single-step RAPET (reaction under autogenic pressure at elevated temperatures) technique, and the obtained formation mechanism of the core/shell nanocomposite was presented. The carbon-coated NiO/MgO and its supported Pd catalyst, Pd/(NiO/MgO@C), were characterized by SEM, HR-TEM, XRD and cyclic voltammetry. The X-ray diffraction patterns confirmed the face-centered cubic crystal structure of NiO/MgO. Raman spectroscopy measurements provided structural evidence for the formation of a NiO/MgO composite and the nature of the coated carbon shell. The high-resolution transmission electron microscopy images showed the core and shell morphologies individually. The electrocatalytic properties of the Pd/(NiO/MgO@C) catalyst for ethanol oxidation were investigated in an alkaline solution. The results indicated that the prepared Pd-NiO/MgO@C catalyst has excellent electrocatalytic activity and stability.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalMaterials Chemistry and Physics
Volume128
Issue number3
DOIs
StatePublished - 15 Aug 2011

Bibliographical note

Funding Information:
*This work was supported by the Italian National Research Council (CNR): Special ad hoc programme ‘Fito-farmaci e Fitoregolatori’ sub-project No. 7.

Keywords

  • Core-shell structure
  • Ethanol oxidation
  • Nanoparticles

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