使用欧文-威廉姆斯系列的工程单原子站点,同时进行协同光催化CO2减少和CH3氧化
Jian Li1, Minghao Du1, Zhenfa Wu1
1State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, 300387, P. R. China.
Angewandte Chemie (International ed. in English)
|May 31, 2024
概括
这项研究使用欧文-威廉姆斯系列设计了单原子位点 (SAS),证明Cu-SAS/CPF对二氧化碳减少和乙甲氧化具有卓越的稳定性和催化活性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 协调化学 协调化学
背景情况:
- 在3D过渡金属单个位点的结合由晶体场稳定能 (CFSE) 控制.
- 雅恩-泰勒效应影响CFSE并导致欧文-威廉姆斯系列,但其在工程单原子站点 (SASs) 的应用尚未探索.
- 开发强大而高效的SAS对于先进的催化应用至关重要.
研究的目的:
- 应用欧文-威廉姆斯系列作为设计单原子站点 (SAS) 的指南.
- 合成和表征用于定3D过渡金属的新型基联共价类类框架 (CPF).
- 调查金属SAS/CPF在二氧化碳减排和乙甲氧化中的催化性能.
主要方法:
- 合成与基结合的共价类类林框架 (CPFs).
- 将3D过渡金属离子 (Mn2+到Zn2+) 固定在CPF上,以创建单原子位 (SAS).
- 使用欧文-威廉姆斯系列来预测和关联金属支相互作用.
- 实验性表征和理论计算以验证结合效应和催化活性.
- 评估CO2到CO的减少和CH3CHO到CH3COOH的氧化过程中的光催化性能.
主要成果:
- CPFs成功地定了一系列3d单金属离子 (d5-d10).
- 与其他金属对应物相比,Cu-SAS/CPF显著提高了稳定性和电荷传输效率.
- -SAS/CPF在二氧化碳光降解 (~30.3 μmol·g−1·h−1) 和CH3CHO光氧化 (~24.7 μmol·g−1·h−1) 中表现出高活性.
- 在二氧化碳减排过程中产生的超氧化基 (O2−) 被确定为引发乙甲氧化过程的关键中间体.
结论:
- 欧文-威廉姆斯系列为设计具有量身定制的催化性能的SAS提供了有效的理论框架.
- -SAS/CPF代表了一种有前途的催化系统,可以同时利用二氧化碳和降解有机污染物.
- 这项工作建立了基于基本协调化学原理的SAS催化性能调节的新策略.
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