期刊論文
| 學年 | 113 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2024-08-22 |
| 作品名稱 | Defect engineering simultaneously regulating exciton dissociation in carbon nitride and local electron density in Pt single atoms toward highly efficient photocatalytic hydrogen production |
| 作品名稱（其他語言） | |
| 著者 | Dongjie Liu; Chunyang Zhang; Jinwen Shi; Yuchuan Shi; Ta Thi Thuy Nga; Maochang Liu; Shaohua Shen; Chun-Li Dong |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Small 20, 2310289 |
| 摘要 | The high exciton binding energy (Eb) and sluggish surface reaction kinetics have severely limited the photocatalytic hydrogen production activity of carbon nitride (CN). Herein, a hybrid system consisting of nitrogen defects and Pt single atoms is constructed through a facile self-assembly and photodeposition strategy. Due to the acceleration of exciton dissociation and regulation of local electron density of Pt single atoms along with the introduction of nitrogen defects, the optimized Pt-MCT-3 exhibits a hydrogen production rate of 172.0 µmol h−1 (λ ≥ 420 nm), ≈41 times higher than pristine CN. The apparent quantum yield for the hydrogen production is determined to be 27.1% at 420 nm. The experimental characterizations and theoretical calculations demonstrate that the nitrogen defects act as the electron traps for the exciton dissociation, resulting in a decrease of Eb from 86.92 to 43.20 meV. Simultaneously, the stronger interaction between neighboring nitrogen defects and Pt single atoms directionally drives free electrons to aggregate around Pt single atoms, and tailors the d-band electrons of Pt, forming a moderate binding strength between Pt atoms and H* intermediates. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 1613-6810; 1613-6829 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | DEU |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127600 ) |