Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces

Abstract The polaron introduced by the oxygen vacancy (Vo) dominates many surface adsorption processes and chemical reactions on reduced oxide surfaces. Based on IR spectra and DFT calculations of NO and CO adsorption, we gave two scenarios of polaron-involved molecular adsorption on reduced TiO2(11...

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Autores principales: Yunjun Cao, Min Yu, Shandong Qi, Shiming Huang, Tingting Wang, Mingchun Xu, Shujun Hu, Shishen Yan
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Publicado: Nature Portfolio 2017
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spelling oai:doaj.org-article:3809b9393a1d4beeb8cd1cbc6decb8e02021-12-02T15:06:25ZScenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces10.1038/s41598-017-06557-62045-2322https://doaj.org/article/3809b9393a1d4beeb8cd1cbc6decb8e02017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06557-6https://doaj.org/toc/2045-2322Abstract The polaron introduced by the oxygen vacancy (Vo) dominates many surface adsorption processes and chemical reactions on reduced oxide surfaces. Based on IR spectra and DFT calculations of NO and CO adsorption, we gave two scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces. For NO adsorption, the subsurface polaron electron transfers to a Ti:3d-NO:2p hybrid orbital mainly on NO, leading to the large redshifts of vibration frequencies of NO. For CO adsorption, the polaron only transfers to a Ti:3d state of the surface Ti5c cation underneath CO, and thus only a weak shift of vibration frequency of CO was observed. These scenarios are determined by the energy-level matching between the polaron state and the LUMO of adsorbed molecules, which plays a crucial role in polaron-adsorbate interaction and related catalytic reactions on reduced oxide surfaces.Yunjun CaoMin YuShandong QiShiming HuangTingting WangMingchun XuShujun HuShishen YanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Yunjun Cao
Min Yu
Shandong Qi
Shiming Huang
Tingting Wang
Mingchun Xu
Shujun Hu
Shishen Yan
Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces
description Abstract The polaron introduced by the oxygen vacancy (Vo) dominates many surface adsorption processes and chemical reactions on reduced oxide surfaces. Based on IR spectra and DFT calculations of NO and CO adsorption, we gave two scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces. For NO adsorption, the subsurface polaron electron transfers to a Ti:3d-NO:2p hybrid orbital mainly on NO, leading to the large redshifts of vibration frequencies of NO. For CO adsorption, the polaron only transfers to a Ti:3d state of the surface Ti5c cation underneath CO, and thus only a weak shift of vibration frequency of CO was observed. These scenarios are determined by the energy-level matching between the polaron state and the LUMO of adsorbed molecules, which plays a crucial role in polaron-adsorbate interaction and related catalytic reactions on reduced oxide surfaces.
format article
author Yunjun Cao
Min Yu
Shandong Qi
Shiming Huang
Tingting Wang
Mingchun Xu
Shujun Hu
Shishen Yan
author_facet Yunjun Cao
Min Yu
Shandong Qi
Shiming Huang
Tingting Wang
Mingchun Xu
Shujun Hu
Shishen Yan
author_sort Yunjun Cao
title Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces
title_short Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces
title_full Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces
title_fullStr Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces
title_full_unstemmed Scenarios of polaron-involved molecular adsorption on reduced TiO2(110) surfaces
title_sort scenarios of polaron-involved molecular adsorption on reduced tio2(110) surfaces
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/3809b9393a1d4beeb8cd1cbc6decb8e0
work_keys_str_mv AT yunjuncao scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT minyu scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT shandongqi scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT shiminghuang scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT tingtingwang scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT mingchunxu scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT shujunhu scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
AT shishenyan scenariosofpolaroninvolvedmolecularadsorptiononreducedtio2110surfaces
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