协同Rh1-Cu1双原子位点通过自选氧源从O2/H2O提高乙低温氧化性能
Bin Li1, Siquan Feng1, Jiaqian Wang2
1Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
Angewandte Chemie (International ed. in English)
|February 4, 2026
概括
这项研究引入了一种新的双原子催化剂,用于高效地将乙转化为有价值的化学物质. Rh-Cu催化剂显示出增强的选择性和生产力,为页岩气利用提供了一个有前途的途径.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 直接转化乙对于页岩气利用至关重要.
- 双原子催化剂为增强反应性提供独特的合作效应.
- 选择性氧化乙到氧酸盐是一个具有挑战性但重要的过程.
研究的目的:
- 开发一种由有机聚合物支持的多孔Rh-Cu双位点催化剂,用于选择性乙氧化.
- 研究催化过程中自选氧源机制.
- 与单原子催化剂相比,提高乙转换的生产率和选择性.
主要方法:
- 合成一个有机聚合物支持的多孔Rh1-Cu1双位点催化剂 (Rh1-Cu1@POPs-PPh3).
- 使用同位素标记和现场技术进行表征.
- 密度函数理论 (DFT) 计算以阐明反应机制和活性位点属性.
主要成果:
- 优化的Rh1-Cu1催化剂实现了大约1的生产率. 250 mol molRh-1 h-1 在 423 K 时具有 65% 的乙甲选择性.
- 与单个Rh位点催化剂相比,观察到性能提高了四倍.
- 发现了一种自选氧源机制,涉及不同的氧物种用于乙醇和乙甲的形成.
结论:
- 该Rh1-Cu1@POPs-PPh3催化剂使得高效和选择性的低温直接转化乙.
- 这项研究揭示了一种新的自选氧源机制,控制了反应途径.
- DFT计算证实,Rh-Cl-Cu配置增强了乙激活,并促进了催化循环.
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