通过原子工程设计的单原子-集群协同接口,打破了氨基水解中的活性稳定性权衡
Jiankang Zhang1, Panzhe Qiao2, Jinlong Hu3
1Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
Science bulletin
|January 25, 2026
概括
原子分散的异金属催化剂使用原子层沉积 (ALD) 精确地构建. 这种方法产生了一种具有增强活性和耐久性的新型催化剂,用于氨 (AB) 水解.
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.
- 纳米技术 纳米技术
背景情况:
- 原子分散的异金属催化剂提供高原子效率和独特的接口特性.
- 这些催化剂的精确原子级构造仍然是一个重大挑战.
- 现有的单原子催化剂往往在活性和稳定性方面面临限制.
研究的目的:
- 开发一种结构定义的原子催化剂,具有精确设计的活性位点.
- 为了研究氨 (AB) 水解脱的新催化剂的催化性能.
- 阐明不同金属界面上的协同作用机制.
主要方法:
- 序列原子层沉积 (ALD) 用于控制PtSANiC/CNT的合成.
- 在现场的X射线吸收光谱 (XAS) 用于电子结构分析.
- 动力学和动态分析,以及密度函数理论 (DFT) 计算,以获得机械学见解.
主要成果:
- 优化的PtSANiC/CNT催化剂表现出优异的活性 (9.6x PtSA/CNT) 和耐用性 (1.4x PtSANiSA/CNT) 在AB水解脱过程中.
- 发现接口PtSANiC位点能够协同促进水的激活和的脱吸.
- 集群促进了H2O激活,而Pt单个原子通过d频段中心修改增强了B-H键裂变.
结论:
- 基于ALD的原子工程方法可以精确地构建具有定义活性位点的异金属催化剂.
- PtSANiC/CNT催化剂通过利用界面协同作用来提高催化活性和稳定性,表现出卓越的性能.
- 这一战略为开发各种化学转换的高效和耐用的催化剂提供了可通用的途径.
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