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| P Doped CeO2 Nanorods Supported Co for Photocatalytic Hydrogen Evolution from Ammonia Borane |
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Received:December 02, 2022
Revised:December 07, 2022
Accepted:December 12, 2022
Published Online:March 17, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.04.009 |
| KeyWord:photogenerated carrier；synergistic effect；ammonia borane; P doping |
| Author | Institution |
| SONG Jin |
河套学院功能材料实验室 |
| WU Feng-long |
河套学院生态与资源工程系 |
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| Abstract: |
| The separation efficiency of photogenerated carrier on supports is important factor for activity of support-catalyst. Surface engineering is a common method to improve the separation efficiency of catalysts by modification the surface electronic structure. The P-CeO2 with rich oxygen vacancies and P doping by sodium hypophosphite (NaH2PO2) heat treatment was prepared to support metal Co to achieve the catalyst Co/P-CeO2. The catalyst exhibites excellent catalytic performance for hydrogen evolution from ammonia borane (NH3BH3) under visible irradiation. When the molar ratio of CeO2 and NaH2PO2 is 1.6, turnover frequency (TOF) of Co/P-CeO2-1.6 is 81.83 min-1, which rises up 25.5% compared with that of CeO2. Additionally, Co/P-CeO2-1.6 also exhibits good cyclic stability. Advanced characterization shows the enhanced activity is ascribed to synergistic effect of oxygen vacancies and P doping, leading to extended absorption edge (470 nm)，narrowed band gap (2.25 eV) and higher separation efficiency of photogenerated carrier. This work not only provides an efficient catalyst for hydrogen evolution from NH3BH3, but also paves the way for designing high performance catalyst by element doping for photocatalytic reactions. |
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