双位单原子Ni催化剂,用于高效的乙烯寡合化到1-hexene
Yang Li1,2, Da Song2, Shengxi Zhao3
1Provincial Key Laboratory of Polyolefin New Materials, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 24, 2025
概括
在共价有机框架 (COF) 中使用新型单原子催化剂的乙烯寡合化克服了更高α-olefin生产的挑战. 这种催化剂具有高活性和选择性,可实现高效的乙烯转化.
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:
- 页岩革命增加了乙烯的可用性,创造了对更高的α-olefins (例如,丁烯,烯) 的需求.
- 乙烯寡合化有利于产生这些更高的α-olefins,但催化剂失活和分离问题仍然存在.
- 开发高效和可回收的催化剂对于可持续的乙烯寡合化至关重要.
研究的目的:
- 设计和合成一种高度活性和选择性的乙烯寡合化催化剂.
- 为应对催化剂聚合,失活和可回收性方面的挑战.
- 研究催化剂协调环境和产品选择性之间的结构-活动关系.
主要方法:
- 使用共价有机框架 (COFs) 在原子水平上定金属活性中心.
- 在COF结构中合成分散的单原子催化剂 (NPP@Ni).
- 在多个周期中评估催化性能,包括活性和选择性.
- 使用密度函数理论 (DFT) 计算来理解催化机制.
主要成果:
- 单原子催化剂NPP@Ni表现出极高的活性 (10.96 × 10^5 g/mol Ni·h) ^-1) 和高的六烯选择性 (>66.5%).
- COF结构防止了催化剂聚合,在多个催化循环中增强了稳定性和可回收性.
- 在COF调制的催化性能中,对Ni协调环境进行系统的调整.
结论:
- 在COF中指导协调提供了一个可行的策略,用于创建高度分散的,稳定的单原子催化剂.
- 催化剂设计有效地克服了乙烯寡合化中的常见挑战.
- 这项工作为设计用于选择性烯生产的先进催化剂提供了重要的见解.
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