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在单个纳米集群催化中操纵活性站点,通过在原子精度下进行异金属协调杂交
Qi Dai1, Xi Chen2, Bao-Ding Zhang1
1Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, P. R. China.
Angewandte Chemie (International ed. in English)
|January 22, 2026
概括
一个新的异金属协调杂交 (HCH) 协议允许在单个纳米集群催化剂上精确构建可访问的活性站点. 这种方法产生了一个金铜纳米集群,在化C-O合反应中具有特殊的性能.
科学领域:
- 不同质的催化剂.
- 纳米材料科学 纳米材料科学
- 协调化学 协调化学
背景情况:
- 在单个纳米集群催化剂上以原子精度构建可访问的活性站点是一个重大挑战.
- 当前的方法往往在催化场的稳定性和可访问性方面扎.
- 量身定制金属-连接物协调是控制催化剂性能的关键.
研究的目的:
- 开发一种新的协议,用于在单个纳米集群催化剂上创建稳定和可访问的活性站点.
- 使用这个协议合成和描述一个新的异金属纳米集群.
- 为了评估合成的纳米集群对化C-O合的催化性能.
主要方法:
- 开发异金属协调杂交 (HCH) 协议.
- 一个同质的超原子纳米集群的合成 [(AuCu) 71(m-MBT) 46](CF3SO3) 3,表示为 (AuCu) 71.
- 通过单晶X射线衍射进行结构确定.
- 在XC-72上支持 (AuCu) 71的催化测试,以在温和条件下进行化C-O合.
主要成果:
- 该HCH战略成功地产生了 (AuCu) 71纳米集群,具有四个稳定,可访问的双Au站点.
- (AuCu) 71/XC-72催化剂在化C-O合中显示了创纪录的高周转数 (2.88 × 10^6) 和周转频率 (3.48 × 10^5 h^-1).
- 与Pd/C系统相比,性能显著优越 (比Pd/C系统高四个数量级).
- 催化剂表现出极好的耐用性,并通过Au-O相互作用促进了特定的吸附机制.
结论:
- 该HCH协议是有效的设计和建造异质金属催化剂,具有明确的,可访问的活性站点.
- (AuCu) 71纳米集群代表了化C-O合的高效催化剂,这是由于其独特的表面结构.
- 这项工作为通过合理设计原则推进单个纳米集群催化提供了新的途径.
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