从单一的多选择性有机结构指导剂中合成CHA/ERI型热带石杂交的一合成
Soonhyoung Kwon1, Estefanía Bello-Jurado2, Evgeniia Ikonnikova3
1Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
ACS applied materials & interfaces
|March 13, 2024
概括
研究人员使用一种特定的有机结构指导剂开发了一种新的单合成,用于查巴/埃里奥尼特热酸杂交生长. 这些可调节的化物显示出选择性催化降解 (SCR) 反应的催化剂的希望.
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:
- 热带石是具有各种工业应用的关键微孔材料.
- 控制石杂交生长结构是具有挑战性的,但为定制性质提供了机会.
- 目前用于选择性催化还原 (SCR) 的催化剂在性能和稳定性方面存在局限性.
研究的目的:
- 开发一种可调节的氏体 (CHA) /氏体 (ERI) 烯酸杂生长结构的新型合成方法.
- 为了研究这些相互生长的热岩的结构-属性关系.
- 为了评估它们在选择性催化降解 (SCR) NO与NH3.3中的性能.
主要方法:
- 在富含的环境中使用6-azaspiro[5.6]dodecan-6-ium作为有机结构指导剂 (OSDA) 的单合成.
- 高通量模拟以确定一个最佳的双选择性OSDA.
- 粉末X射线衍射 (PXRD) 和集成差相对比扫描传输电子显微镜 (iDPC-S/TEM) 用于结构特征.
- 用NH3对NO进行选择性催化还原 (SCR) 的合成化物的测试.
主要成果:
- 成功合成了一种具有可调节相位比率和Si/Al摩尔比率的CHA/ERI烯酸杂成长结构.
- 通过使用先进的显微镜证实了由ERI支柱架构的圆盘状CHA区域的独特交织结构.
- 在 ERI 阶段确定了单一的offeretite 层.
- 通过调整OSDA/Si和K/Si比率来证明可调节的CHA/ERI比率.
- 与商业Cu-SSZ-13相比,在NH3-SCR反应中获得了竞争力的催化性能和水热稳定性.
结论:
- 开发的单合成为可调节的CHA/ERI烯酸杂成长提供了一条通用的途径.
- 这些交织在一起的热石在NH3-SCR应用中表现出有前途的催化活性和稳定性.
- 这些发现凸显了设计用于工业催化工业的先进热材料的潜力.
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