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Promotional Role of Oxygen Vacancy Defects and Cu‐Ce Interfacial Sites on the Activity of Cu/CeO2 Catalyst for CO2 Hydrogenation to Methanol

Von Wiley-VCH zur Verfügung gestellt

Development of novel catalyst for CO 2  conversion to methanol is still a challenge. A series of Cu/CeO 2  catalyst were prepared by changing the synthesis procedure. The Cu/CeO 2  catalyst were prepared by co-precipitation, surfactant-assisted co-precipitation, and sol-gel methods for CO 2 hydrogenation to methanol are documented. The performance of these catalysts was evaluated to elucidate the role of catalytic properties. The Cu/CeO 2  catalyst synthesized by the sol-gel (Cu/CeO 2 -SG) method exhibited superior strong basic site density, Cu dispersion, and oxygen vacancy defects than co-precipitation method. A correlation between strong basic site density, oxygen vacancies, and methanol space time yield was established. Moreover, the promotional role of Cu-Ce interfacial sites on the reduced Cu 4t /CeO 2 (111) cluster in CO 2  adsorption and activation has been reported by the DFT calculation. These experimental and theoretical results provide insights into Cu-CeO 2  interaction and role of metal-support interactions in the CO 2  hydrogenation reaction.

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