Hydrogen production using Niobium-doped Co-CeO2 catalyst

Proceedings of ‏The 10th International Conference on Research in Science and Technology

Year: 2020

DOI:

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Hydrogen production using Niobium-doped Co-CeO₂ catalyst

Chang-Hoon Jeong, Ju-Hwan Kim, Dae-Woon Jeong

ABSTRACT: 

Recently, cobalt-based catalysts are attracting attention due to their high activity in HTS reactions. However, due to its low stability, research is needed on promoters that can improve the stability of the catalyst. In this study, a niobium-doped Co-CeO₂-Nb₂O₅ catalyst was prepared by co-precipitation to increase the activity and stability of the Co-CeO₂ catalyst for high temperature shift reaction. And their physicochemical properties were investigated using N₂ adsorption/desorption, XPS, XRD, and H₂-CO₂ pulse measurements. The results obtained revealed that the Co-CeO₂-1.5Nb₂O₅ catalyst showed the highest catalytic performance among the Co-CeO₂-Nb₂O₅ catalysts at an extremely high gas hourly space velocity of 637,320 h^-1. In addition, this catalyst showed an excellent performance that remained stable for 50 h. This high activity and stability of the Co-CeO₂-1.5Nb₂O₅ catalyst resulted from its high oxygen storage capacity (OSC), Co dispersion, and small CoO size. Therefore, it is a promising catalyst for hydrogen production via the high temperature shift reaction.

Keywords: Cobalt-based catalysts; High temperature shift; Hydrogen; Niobium; Oxygen storage capacity.