通过对双原子催化剂进行机制调节,可实现高性能氧化酒精化
Ce Liu1, Teng Li1, Xingchao Dai1
1State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Science bulletin
|September 14, 2024
概括
一种新的铜双原子催化剂 (CoCu-DAC) 在酒精化方面表现优异,与单原子催化剂相比. 这种双原子设计降低了激活能量,并使各种的高效合成成为可能.
科学领域:
- 不同质的催化剂.
- 材料科学是一种材料科学.
- 有机合成 有机合成
背景情况:
- 开发具有精确定义活性位点的催化剂对于理解催化机制和性能至关重要.
- 单原子催化剂 (SAC) 具有高原子利用率,但在复杂反应中可能存在局限性.
研究的目的:
- 设计和合成具有特定结构的铜双原子催化剂 (CoCu-DAC).
- 评估CoCu-DAC在酒精的氧化化中的催化活性和选择性.
- 阐明反应机制,并与单原子催化剂进行比较.
主要方法:
- 合成嵌入在具有定义Co(OH) CuN6结构的添加碳矩阵中的CoCu-DAC.
- 对酒精的氧化化进行催化试验.
- 动力学研究以确定激活能量.
- 密度函数理论 (DFT) 计算来分析反应机制.
主要成果:
- 与Co-SAC和Cu-SAC相比,CoCu-DAC的催化活性和选择性更高.
- 与Co-SAC (38.4 kJ mol-1) 相比,CoCu-DAC实现了较低的激活能量 (29.7 kJ mol-1).
- DFT研究揭示了CoCu-DAC (阶段性醇基通路) 和SACs (基基通路) 的不同反应途径.
结论:
- 在CoCu-DAC中结合的Co-Cu双原子位点有效催化酒精脱,O2激活和形成.
- CoCu-DAC的独特催化性能归因于双原子位点和添加碳基质的协同效应.
- 这项研究为设计高效有机合成的先进双原子催化剂提供了洞察力.
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