We present that 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. Lastly, 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.
Polo Garzon, Felipe, et al. "Neutron Scattering Investigations of Hydride Species in Heterogeneous Catalysis." ChemSusChem, vol. 12, no. 1, Nov. 2018. https://doi.org/10.1002/cssc.201801890
Polo Garzon, Felipe, Luo, Si, Cheng, Yongqiang, et al., "Neutron Scattering Investigations of Hydride Species in Heterogeneous Catalysis," ChemSusChem 12, no. 1 (2018), https://doi.org/10.1002/cssc.201801890
@article{osti_1489564,
author = {Polo Garzon, Felipe and Luo, Si and Cheng, Yongqiang and Page, Katharine L. and Ramirez Cuesta, Anibal and Britt, Phillip F. and Wu, Zili},
title = {Neutron Scattering Investigations of Hydride Species in Heterogeneous Catalysis},
annote = {We present that 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. Lastly, 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.},
doi = {10.1002/cssc.201801890},
url = {https://www.osti.gov/biblio/1489564},
journal = {ChemSusChem},
issn = {ISSN 1864-5631},
number = {1},
volume = {12},
place = {United States},
publisher = {ChemPubSoc Europe},
year = {2018},
month = {11}}
Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division