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Shin, Hyeon Suk
Lab for Carbon and 2D Materials
Research Interests
  • Two-dimensional materials: graphene, transition metal dichalcogenides, h-BN, and their heterostructures

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Photocatalytic dehydrogenation of organic hydrogen carrier on Pd-TiO2(110) surfaces

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Title
Photocatalytic dehydrogenation of organic hydrogen carrier on Pd-TiO2(110) surfaces
Author
Kang, Jeong SuBaek, Ju YeolHwang, HyuntaeShin, Hyeon SukYoon, Chang WonShin, Hyung-Joon
Issue Date
2022-11
Publisher
Royal Society of Chemistry
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.10, pp.22701 - 22706
Abstract
Hydrogen can be stored in a liquid organic hydrogen carrier (LOHC) via the formation of chemical bonds with carbon. Most recently studied LOHC molecules store hydrogen through the transformation between cyclohexane and benzene. However, because the C–H bonds of cyclohexane are difficult to break, catalysts and high temperatures are usually required to achieve this transformation. In this study, we investigated the photocatalytic dehydrogenation of cis-1,4-diaminocyclohexane on the surface of TiO2(110) decorated with Pd nanoparticles by low-temperature scanning tunnelling microscopy and X-ray photoelectron spectroscopy. The photocatalytic dissociation of the C–H bond was observed on Pd-decorated TiO2 but not on the bare TiO2 surface under 365 nm UV irradiation. We showed that the dehydrogenation reaction is induced by hot electrons produced by the dielectric response of TiO2(110) toward plasmonic metal nanoparticles. The photocatalytic dehydrogenation is performed under extremely low temperature and pressure compared to conventional dehydrogenation processes of LOHC molecules, which suggests a prospective pathway of the H2-release process for the LOHCs.
URI
https://scholarworks.unist.ac.kr/handle/201301/59897
DOI
10.1039/D2TA04956B
ISSN
2050-7488
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CHM_Journal Papers
MSE_Journal Papers
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