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嵌入到热利石中的-双原子位点提高了对污染干扰的抵抗力,用于环境催化

Yanqi Chen¹, Penglu Wang¹, Wenqiang Qu^1,2

¹International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences, Shanghai University, Shanghai, 200444, P.R. China.

Angewandte Chemie (International ed. in English)

|October 11, 2025

概括

在SSZ-13中有一种新的铜双原子催化剂,可以抵抗汽车排气中的失活. 这项创新保持了高的NOX减排效率,为清洁的运输燃料提供了持久的解决方案.

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
环境科学环境科学

背景情况:

生物柴油的使用导致排气中的和金属酸盐污染.
这种污染会使传统的Cu-SSZ-13催化剂失效,从而减少NO_X.
催化剂的失活是通过孔隙堵塞,框架退化和铜部位损失发生的.

研究的目的:

开发一种强大的催化剂,耐中毒,用于氨选择性催化还原 (NH₃-SCR).
研究 (Ce) 在丰富条件下增强催化剂稳定性和性能方面的作用.
为在对杂质敏感的环境应用中提供耐用催化剂的实用策略.

主要方法:

合成一个嵌入在SSZ-13热岩框架中的Cu-Ce双原子催化剂.
催化剂结构的表征,包括Ce物种的精确定位.
在模拟富排气条件下对NH₃-SCR中的催化剂性能进行评估.

主要成果:

-双原子催化剂在210°C时表现出高NO_X转化 (90%) 和N₂选择性 (100%),即使在暴露后也是如此.
八个成员环中的Ce物种取代了P敏感部位,有利于六个成员环中的P耐受性Z2+物种.
Ce-P 相互作用恢复了 Cu 位点的电子环境,改善了 NH₃/NO 吸附和氧化还原循环.

结论:

开发的Cu-Ce双原子催化剂在NH₃-SCR中对中毒提供了极好的抵抗力.
这种催化设计为可持续的移动性提供了耐用,耐杂质的催化剂的可行途径.
该策略适用于其他环境反应,如NH3氧化和NOX与VOCs去除.

关键词:

双原子站点是一个双原子站点.环境催化剂的作用不洁净的干扰干扰不洁净的干扰电阻电阻电阻电阻电阻电阻泽奥莱特石是一种热带石.

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