Understanding the spatial distribution and different nature of active sites and elucidating their synergy in heterogeneous catalysts are fundamentally important for providing comprehensive insight into relevant structure–function relationships. However, this is difficult to achieve in microporous zeolite materials owing to the nearly indistinguishable physicochemical properties of each acidic site observed by conventional techniques. Here we report the real-space observation, with atomic molecular insights, of fascinating acidic properties in dual-pore channels of mordenite (H-MOR) zeolite using a combination of nuclear magnetic resonance probe molecule techniques and density functional theory calculations. Accordingly, the impact of acidic properties (e.g., detailed acidic distribution, pore confinement effect, and synergy effect of Brønsted acid pairs) of H-MOR zeolite on catalytic performance has been clarified. These results offer new insights into cooperative acid-catalyzed reactions over porous acidic catalysts with diverse pore architectures.

中文翻译：

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从一到二：多孔沸石材料中的酸性质子空间网络

了解活性位点的空间分布和不同性质并阐明它们在多相催化剂中的协同作用对于全面了解相关的结构-功能关系至关重要。然而，由于通过常规技术观察到的每个酸性位点的近乎难以区分的物理化学性质，在微孔沸石材料中难以实现这一点。在这里，我们结合原子核磁共振探针分子技术和密度泛函理论计算结果，结合原子分子洞察力，对丝光沸石（H-MOR）沸石双孔通道中令人着迷的酸性进行了真实空间观察。因此，酸性质的影响（例如，详细的酸分布，孔隙限制作用，和H-MOR沸石的布朗斯台德酸对的协同作用已被阐明。这些结果为在具有多种孔结构的多孔酸性催化剂上协同酸催化反应提供了新的见解。