沸石-水化学:揭示沸石结构的表征方法

IF 6.1 Q1 CHEMISTRY, MULTIDISCIPLINARY
José Nuno Almeida, Lu Song, Sohrab Askarli, Sang-Ho Chung, Javier Ruiz-Martínez
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引用次数: 0

摘要

本文综述了水与沸石的相互作用,重点介绍了水与沸石的相互作用对沸石结构和催化性能的影响。它详细介绍了水如何通过在沸石拓扑结构中不同的水模式形成氢键或水合氢离子来改变沸石的酸度。此外,总结了Si - O - T键水解导致沸石稳定性损失的风险,从而影响沸石的稳定性、结构和催化反应性。为了解决水的干扰,从沸石结构的角度对沸石框架的各种脱水策略进行了综述和提出。通过结合先进的原位技术,FTIR和固态核磁共振已被证明可以有效地提供原子水平的见解,因为它们消除了水的掩蔽效应,从而能够精确表征沸石骨架。这项工作强调了这些方法在最大限度地减少水的影响,提高沸石催化应用表征的可靠性方面的重要性,并为相关领域的最新进展、挑战和未来方向提供了见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Zeolite–Water Chemistry: Characterization Methods to Unveil Zeolite Structure

Zeolite–Water Chemistry: Characterization Methods to Unveil Zeolite Structure

This review provides comprehensive aspects of the interaction of water with zeolites, focusing on its influence on the structural and catalytic properties of zeolites. It details how water can alter zeolite acidity by forming hydrogen bonding or hydronium ions through different modes of water in zeolite topologies. Moreover, it summarizes the risks of zeolite stability loss via hydrolysis of Si−O−T bonds to influence the stability, structure, and catalytic reactivity of zeolites. To address water interference, various strategies for water removal from zeolite frameworks are reviewed and proposed from the structural perspective of the zeolites. By combining advanced in-situ techniques, FTIR and solid-state NMR have proven effective in providing atomic-level insights, as they eliminate the masking effects of water to enable precise characterization of the zeolite framework. This work underscores the importance of these methods in minimizing the influence of water, enhancing the reliability of zeolite characterization for catalytic applications, and providing insights into recent advancements, challenges, and future directions in the related fields.

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CiteScore
7.30
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