F-doped CeO2 supported Co-based nanoparticles for enhanced photocatalytic H2 evolution from ammonia borane. (26th April 2023)

• Record Type: Journal Article
• Authors: Song, Jin; Wu, Fenglong; Lu, Yulun; Zhang, Xinyan
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 35(2023)
• Page Start: 13202
• Page End: 13212
• Publication Date: 2023-04-26
• Subjects: Doping -- F–CeO2 -- Photocatalytic -- H2 evolution -- Ammonia borane; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.12.219
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Doping as a common mean to generate defects to boost the catalytic performance of metal oxide semiconductor-based materials has aroused great interest. However, doping usually requires high temperatures and is time consuming. Herein, we report a facile strategy for the preparation of F doped CeO2 (F–CeO2 ) with assistance of the electrostatic attraction between F − and CeO2 with oxygen vacancies at room temperature, then F–CeO2 acts as superior support of metal Co nanoparticles (NPs) for efficient hydrolysis of NH3 BH3 under light irradiation. The activity of Co/F–CeO2 is significantly enhanced and Co/F–CeO2 -0.6 exhibited highest catalytic activity with TOF value 92.8 min −1 which increases 47% compared with Co/CeO2 . Experimental and characterization results show the enhanced performance attributes to high efficiency photogenerated carrier separation and boosting adsorption capacity of H2 O and NH3 BH3 over Co/F–CeO2 due to F doped into CeO2 crystallites. Furthermore, theory calculations further confirm that the band gap of F–CeO2 becomes smaller and F–CeO2 is more favorable the adsorption for H2 O and NH3 BH3 than pure CeO2 . This work offers a facile and time efficiency strategy to realize controllable element doped in metal oxide under ambient, and gives deep insights into the structure–activity relationship of catalyst between defect engineering and photocatalytic performance. Graphical abstract: Image 1 Highlights: F–CeO2 was synthesized by the electrostatic attraction between F − and CeO2 with oxygen vacancies at room temperature. F–CeO2 acts as superior support of Co nanoparticles for efficient hydrolysis of NH3 BH3 under light irradiation. The optimal catalyst shows a high TOF value of 92.8 min −1 at room temperature. The Co/F–CeO2 possesses boosted capacity of photogenerated carrier separation and adsorption of H2 O and NH3 BH3 .