Time-Domain NMR: Generating Unique Insights into the Characterization of Heterogeneous Catalysis in Liquid Phase

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2025-01-21 DOI:10.1021/acscatal.4c04789

Murilo T. Suekuni, Carmine D’Agostino, Alan M. Allgeier

引用次数: 0

Abstract

Time-domain (TD) nuclear magnetic resonance (NMR) comprises a family of tools for characterizing wetted porosity and surface area, fluid-catalyst surface adsorption energy, liquid distribution in packed beds, and transport of fluids in catalyst materials. These methods are differentiated from NMR spectroscopy in that the data are not analyzed in the frequency domain and often benefit from the use of low magnetic field strength. The increased accessibility of commercial, low-field, benchtop NMR instruments has supported substantial growth in TD NMR research in catalysis. This perspective offers a tutorial on physical phenomena critical to TD NMR methods, a summary of applications in both ex situ and in situ settings, and commentaries on ensuring experimental rigor and opportunities for growth in the field. The unique insights accessible from TD NMR often cover length scales in the tens of nanometers to tens of micrometers and are complementary to other catalyst characterization methods probing molecular structure and identity.

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时域核磁共振：对液相中多相催化的表征产生独特的见解

时域（TD）核磁共振（NMR）包括一系列工具，用于表征湿孔隙率和表面积、流体-催化剂表面吸附能、填充床中的液体分布以及催化剂材料中流体的输运。这些方法与核磁共振光谱的不同之处在于，数据不在频域分析，并且通常受益于使用低磁场强度。商业化、低场、台式核磁共振仪器的日益普及，支持了TD核磁共振催化研究的大幅增长。这一观点提供了对TD NMR方法至关重要的物理现象的教程，对非原位和原位设置的应用进行了总结，并对确保实验严谨性和该领域发展机会进行了评论。从TD NMR获得的独特见解通常涵盖数十纳米到数十微米的长度尺度，并且与其他探测分子结构和身份的催化剂表征方法相辅相成。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.