Surface oxygen vacancies of Pd/Bi2MoO6-x acts as 'Electron Bridge' to promote photocatalytic selective oxidation of alcohol
| Autor: | Xue-fang Yu, Kaisheng Zhang, Xiaolong Yang, Jianbo Cheng, Zhaoli Sun, Yan Zhang, Yanhua Peng, Jianqiang Yu, Zhuo Li, Linhong Xia |
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| Rok vydání: | 2021 |
| Předmět: |
Surface oxygen
Materials science business.industry Process Chemistry and Technology 02 engineering and technology Electron 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Redox Catalysis 0104 chemical sciences Semiconductor Alcohol oxidation Photocatalysis Cluster (physics) 0210 nano-technology business General Environmental Science |
| Zdroj: | Applied Catalysis B: Environmental. 285:119790 |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2020.119790 |
| Popis: | The recombination of photogenerated carriers seriously restricts their utilization efficiency in photocatalysis. Herein, surface oxygen vacancies (SOVs) were constructed in Pd-Bi2MoO6 interface to bridge ultra-low loading Pd cluster and Bi2MoO6 semiconductor (Pd/BMO-SOVs). It was found SOVs in Pd/Bi2MoO6-x serve as “Electron Bridge” to bridge ultra-low loading Pd cluster and Bi2MoO6-x, thus tremendously enhance utilization efficiency of photoexcited carriers and ultra-low loading Pd active sites for blue LED driven selective oxidation reaction. The Pd(0.05)/Bi2MoO6-SOVs exhibited 57.8 % conversion for selection oxidation of benzyl which are 6.5, 3.3 and 2.1 times higher than pristine Bi2MoO6, Bi2MoO6-x and Pd(0.05)/Bi2MoO6. Combined with theoretical calculations, SOVs was proposed as “Electron Bridge” to transfer photogenerated electrons from Bi2MoO6-x to ultra-low loading Pd clusters, thus greatly boosting separation and utilization efficiency of photogenerated electron-hole pairs. |
| Databáze: | OpenAIRE |
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