摘要
Oxygen vacancies have been widely concerned with the facilitation effects of CO_(2)activation for CO_(2)methanation.However,little attention has been paid to the generation of active intermediate species induced by enriched oxygen vacancies.Herein,we discovered that CeNiO_(3−δ)catalyst enriched oxygen vacancies can efficiently activate CO_(2)and realize high activity for photothermal CO_(2)methanation.In situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)proved that oxygen vacancies are beneficial to the formation of reactive intermediate species of polydentate carbonate over CeNiO_(3−δ),which is crucial for efficient CO_(2)methanation.These results revealed mechanistic insights into how effective CO_(2)activation induced by oxygen vacancies can be manipulated by adjusting the adsorption intermediate species.
基金
Financial support from the National Natural Science Foundation of China(Nos.22025202,51572191,and 21633004)
the Jiangsu Funding Program for Excellent Postdoctoral Talent is gratefully acknowledged.
