CO2 dissociation to CO is an interesting fundamental reaction that can be part of the chemical looping process which utilizes natural gas and CO2/H2O to generate synthesis gas with solar power. Based on previous research, doped ceria and Ni-CeZrO2 produced by citric acid synthesis and combustion methods are promising materials for CO2 dissociation. This study focuses on using temperature programmed reduction followed by a pulse reaction using CO2 to characterize and evaluate the synthesized catalysts. The reduction properties and reaction activity and stability of catalysts are summarized and compared through area integration of the acquired data. There is an optimum Ni loading for the activity and capacity of Ni-CeZrO2 for CO2 dissociation. In addition to optimum Ni loading for activity, plasma treatments are studied to modify those catalysts for improved CO2 dissociation.

Doped ceria catalysts synthesized via combustion methods for CO2 dissociation

ACS Spring 2022

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