The mechanism of reduction of cobalt by hydrogen

Hsin Yu Lin, Yu Wen Chen

Research output: Contribution to journalArticlepeer-review

146 Scopus citations

Abstract

Cobalt catalysts supported on silica were prepared by an impregnating method and characterized using temperature-programmed reduction (TPR). H 2 was used as the reduction agents. The two-stage reduction was observed. Co3O4 was reduced to CoO and then reduced to metallic Co. The activation energies for the two reduction steps of cobalt oxide are 94.43 and 82.97kJmol-1, respectively. The simulation by reduction models of the TPR patterns presents well-fitting of two-dimensional nucleation according to Avarmi-Erofeev model for the reduction of Co 3O4 to CoO and unimolecular model for the reduction of CoO to Co.

Original languageEnglish
Pages (from-to)171-175
Number of pages5
JournalMaterials Chemistry and Physics
Volume85
Issue number1
DOIs
StatePublished - 15 May 2004

Keywords

  • Cobalt
  • Kinetic mechanism
  • Temperature-programmed reduction

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