Nanofiber structured oxygen defective CoFe2O4-x catalyst for the water-gas shift reaction in waste- to-hydrogen processes

Waste-to-hydrogen processes are a way to produce hydrogen from waste and reduce the amount of landfill/incineration of wastes simultaneously through the gasification of waste. The water-gas shift (WGS) reaction is a key step in this waste-to-hydrogen process by removing the CO and producing additional H-2. A nanofiber-structured CoFe(2)O(4 )catalyst was synthesized by the electrospinning method, and the catalytic performance in WGS using waste-derived synthesis gas was compared with that of catalysts prepared by sol-gel, hydrothermal, and co-precipitation methods. The CoFe(2)O(4 )catalyst synthesized by the electrospinning method showed a clear nanofiber structure and revealed a superior redox property. This superior redox property, which has a large relation with the high oxygen storage capacity of the catalyst, induced the formation of an active phase (Co-0 and Fe3O4) in CoFe2O4. As a result, the nanofiber structured oxygen defective CoFe(2)O(4-x )prepared by the electrospinning method showed the best catalytic activity in this study. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

Waste-to-hydrogen processes utilize the gasification of waste to produce hydrogen while reducing landfill/incineration. A nanofiber-structured CoFe(2)O(4) catalyst synthesized by electrospinning method showed superior redox property and exhibited the best catalytic activity in the water-gas shift reaction.