Neutron Scattering Investigations of Hydride Species in Heterogeneous Catalysis.
Neutron Scattering Investigations of Hydride Species in Heterogeneous Catalysis.
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DOI：
10.1002/cssc.201801890
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发表时间：
2018-11
期刊：
影响因子：
8.4
通讯作者：
Felipe Polo-Garzon;S. Luo;Yongqiang Q. Cheng;K. Page;A. Ramirez‐Cuesta;P. Britt;Zili Wu
中科院分区：
文献类型：
--
作者：
Felipe Polo-Garzon;S. Luo;Yongqiang Q. Cheng;K. Page;A. Ramirez‐Cuesta;P. Britt;Zili Wu
在多相催化中，表面或本体上的氢化物在许多涉及氢的反应中作为活性组分或反应中间体发挥关键作用，但这些氢化物物种的性质和结构的表征仍然具有挑战性。中子散射对氢等轻元素极为敏感，在应对这一挑战方面显示出巨大潜力。在这篇小综述中，主要对两类最典型的催化剂-金属和氧化物-的氢化物物种的中子研究的最新进展进行了调查。这些类别之外的催化剂的调查结果提出，如果他们被认为是相关的上下文在本小审查。吸附，解离，溢出，和反应性的氢，特别是氢化物物种在负载型金属和氧化物催化剂，已成功地研究，主要是通过中子振动光谱。这些中子研究的见解，这是不可能的，否则与其他技术，揭示了氢与固体表面的相互作用机制和反应机制，其中氢参与。未来的研究挑战的中子散射研究，以及一般的催化，也突出了，和更多的操作型中子研究需要进行推进该领域。
In heterogeneous catalysis, hydrides on the surface or in the bulk play a critical role as either active components or reaction intermediates in many hydrogen-involving reactions, but characterization of the nature and structure of these hydride species remains challenging. Neutron scattering, which is extremely sensitive to light elements, such as hydrogen, has shown great potential in meeting this challenge. In this Minireview, recent advances in neutron studies of hydride species, mainly over the two most typical classes of catalysts-metals and oxides-are surveyed. Findings on catalysts outside these categories are raised if they are considered to be relevant for contextualization in the present Minireview. The adsorption, dissociation, spillover, and reactivity of hydrogen, especially hydride species over supported metal and oxide catalysts, have been successfully investigated, mostly by means of neutron vibrational spectroscopy. Insights from these neutron studies, which are otherwise not possible with other techniques, shed light on the interaction mechanism of hydrogen with solid surfaces and reaction mechanisms in which hydrogen is involved. Future research challenges on neutron scattering studies of hydrides, as well as catalysis in general, are also highlighted, and more operando-type neutron studies need be conducted to advance the field.