Gao Pan, Hou Guangjin
State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, 2011-Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Magn Reson Lett. 2022 Sep 18;3(1):31-42. doi: 10.1016/j.mrl.2022.09.001. eCollection 2023 Feb.
Metal hydrides (M-H) on solid surfaces, i.e., surface M-H, are ubiquitous but critical species in heterogeneous catalysis, and their intermediate roles have been proposed in numerous reactions such as (de)hydrogenation and alkanes activation, etc., however, the detailed spectroscopic characterizations remain challenging. Solid-state nuclear magnetic resonance (ssNMR) spectroscopy has become a powerful tool in surface studies, as it provides access to local structural characterizations at atomic level from multiple views, with comprehensive information on chemical bonding and spatial structures. In this review, we summarized and discussed the latest research developments on the successful application of ssNMR to characterize surface M-H species on solid catalysts including supported single-site heterogeneous catalysts, bulk metal oxides and metal-modified zeolites. We also discussed the opportunities and challenges in this field, as well as the potential application/development of state-of-the-art ssNMR technologies to enable further exploration of metal hydrides in heterogeneous catalysis.
固体表面的金属氢化物（M-H），即表面M-H，在多相催化中普遍存在且至关重要，在诸如（脱）氢化和烷烃活化等众多反应中已提出它们的中间作用，然而，详细的光谱表征仍然具有挑战性。固态核磁共振（ssNMR）光谱已成为表面研究中的一种强大工具，因为它能从多个角度在原子水平上提供局部结构表征，包含有关化学键合和空间结构的全面信息。在本综述中，我们总结并讨论了ssNMR在表征固体催化剂表面M-H物种方面成功应用的最新研究进展，这些固体催化剂包括负载型单中心多相催化剂、体相金属氧化物和金属改性沸石。我们还讨论了该领域的机遇与挑战，以及先进ssNMR技术的潜在应用/发展，以进一步探索多相催化中的金属氢化物。
