合电子转移和氧化位在波拉尼尔共价有机框架中,以促进光催化水氧化
Rahul Anil Borse1,2, Yan-Xi Tan1,2,3, Jing Lin1,2
1CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, P. R. China.
Angewandte Chemie (International ed. in English)
|February 4, 2024
概括
研究人员开发了一种新的甲功能化共价有机框架 (Ni-TAPP-COF-BF2),用于有效的太阳能驱动的水氧化. 这种新的光催化剂在可见光下显著提高了氧气生产率,为太阳能能量转化提供了一个有前途的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 可再生能源可再生能源是可再生能源.
背景情况:
- 有效的光催化剂对于太阳能驱动的水氧化产生氧气至关重要.
- 现有的材料在吸光,电荷转移和π-结合方面存在局限性,阻碍了氧气进化的速度.
- 开发先进的有机框架是克服这些挑战的关键.
研究的目的:
- 引入一种新型的甲基功能化,完全 π 结合的捐赠体接受体 (D-A) 共价有机框架 (Ni-TAPP-COF-BF2) 作为一种高效的光催化剂.
- 研究其在太阳能驱动的水氧化中提高性能背后的机制.
- 探索其未来能源转换应用的潜力.
主要方法:
- 一个甲基功能化的D-A共价有机框架 (Ni-TAPP-COF-BF2) 的合成.
- 在可见光照射下进行光催化水氧化实验.
- 使用实验技术和理论计算 (例如,DFT) 进行表征,以阐明机制.
- 与原始的Ni-TAPP-COF和其他报告的有机框架进行比较.
主要成果:
- 与原始的Ni-TAPP-COF (~123 μmol g−1 h−1) 相比,Ni-TAPP-COF-BF2光催化剂的氧化水率增加了约11倍 (~1404 μmol g−1 h−1).
- 涉及金属和BF2部分的推/拉机制增强了光收获和π-结合.
- 该策略缩小了带结构,改善了电荷分离,并减少了电荷重组.
- 较低的自旋磁矩和d波段中心位置促进了氧气演变反应.
结论:
- 玻拉尼尔功能化策略有效地增强了氧化水的光催化活性.
- Ni-TAPP-COF-BF2表现出卓越的性能,超过现有的有机框架光催化剂.
- 这项工作为设计用于高效太阳能转换的先进光催化剂提供了一种新方法.
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