Co3O4-Impregnated NiO–YSZ: An Efficient Catalyst for Direct Methane Electrooxidation

Authors:
Publisher website
Google Scholar
Abstract
Co3O4 impregnated NiO-YSZ (yttria-stabilized-zirconia) is a possible electrocatalyst for direct methane electrooxidation with both high catalytic activity and the ability to mitigate coking. The physical and electrochemical properties of Co3O4 impregnated NiO-YSZ anodes are investigated and benchmarked against NiO-YSZ and CeO2 impregnated NiO-YSZ anodes. The following methane electro-oxidation activity trend: - Co3O4-impregnated-NiO-YSZ > CeO2-impregnated-NiO-YSZ > NiO-YSZ with io (exchange current density) values of 88, 83 and 2 mA cm-2 respectively is obtained, in the high overpotential region. The high activity of Co3O4 impregnated NiO-YSZ is attributed to the changes in the electronic structure and micro-structure with the incorporation of nickel into the lattice of Co3O4 as observed using X-ray photoelectron spectroscopy, temperature programmed reduction, high resolution transmission electron microscope and field emission scanning electron microscopy. Co3O4 impregnated NiO-YSZ also demonstrated the least coking during operation, confirming its utility as a methane electrooxidation catalyst.
Funding Information
  • Anusandhan National Research Foundation
  • Indian Institute of Technology Delhi
  • Oil and Natural Gas Corporation of India
  • McKelvey School of Engineering, Washington University in St. Louis

This publication has 68 references indexed in Scilit: