在/氧编的石墨碳化物中超快速生产,通过非adiabatic动态模拟揭示了这一点
Huijuan Yang1, Rongliang Wu1, Wei Li2
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. jinwen@dhu.edu.cn.
Physical chemistry chemical physics : PCCP
|May 1, 2024
概括
/氧编码增强石墨碳化物 (GCN) 的光催化水分裂,通过增加载体寿命. 这种兴奋剂策略加速了质子合电子转移,提高了气生成效率.
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:
- 石墨碳化物 (g-C3N4或GCN) 是水分裂的一个有希望的光催化剂.
- GCN的一个主要限制是快速的电子孔重组,阻碍了它的效率.
- 了解兴奋剂效应对于提高GCN光催化性能至关重要.
研究的目的:
- 为了研究/氧共对GCN对增强气生成的影响.
- 阐明在化GCN系统中改善光催化活性的潜在机制.
主要方法:
- 采用了第一原理计算和非adiabatic分子动力学 (NAMD) 模拟.
- 用于集群模型的时间依赖密度函数理论 (TDDFT).
- 与水分子模拟的B/O联合合的他.
主要成果:
- 与原始GCN相比,Codoping增加了光生成载体重组时间16%-64%,与原始GCN相比.
- 在60 fs的范围内观察到原子的直接光解离.
- 在联网中检测到的质子跳跃在联合联系统中的80 fs内.
结论:
- 更快的质子合电子转移 (PCET) 和无辐射放松是高效水分裂的关键.
- B/O代显著提高了用于生产的GCN光催化效率.
- 这项研究为开发先进的化GCN光催化剂提供了一个新的设计策略.
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