Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy
The surface chemical states of Pd(100) during CO oxidation were investigated using ambient pressure x-ray photoelectron spectroscopy and mass spectroscopy. Under the reactant ratio of CO/O2 = 0.1, i.e. an oxygen-rich reaction condition, the formation of surface oxides was observed with the onset of...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2019-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5081066 |
| _version_ | 1818961714265194496 |
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| author | Youngseok Yu Dongwoo Kim Hojoon Lim Geonhwa Kim Yoobin E. Koh Daehyun Kim Kohei Ueda Satoru Hiwasa Kazuhiko Mase Fabrice Bournel Jean-Jacques Gallet François Rochet Ethan J. Crumlin Philip N. Ross Jr. Hiroshi Kondoh Do Young Noh Bongjin Simon Mun |
| author_facet | Youngseok Yu Dongwoo Kim Hojoon Lim Geonhwa Kim Yoobin E. Koh Daehyun Kim Kohei Ueda Satoru Hiwasa Kazuhiko Mase Fabrice Bournel Jean-Jacques Gallet François Rochet Ethan J. Crumlin Philip N. Ross Jr. Hiroshi Kondoh Do Young Noh Bongjin Simon Mun |
| author_sort | Youngseok Yu |
| collection | DOAJ |
| description | The surface chemical states of Pd(100) during CO oxidation were investigated using ambient pressure x-ray photoelectron spectroscopy and mass spectroscopy. Under the reactant ratio of CO/O2 = 0.1, i.e. an oxygen-rich reaction condition, the formation of surface oxides was observed with the onset of CO oxidation reaction at T = 525 K. As the reactant ratio (CO/O2) increased from 0.1 to 1.0, ∼ 90 % surface oxides remains on surface during the reaction. Upon the formation of surface oxides, the core level shift of oxygen gas phase peak was observed, indicating that change of surface work function. As CO oxidation takes places, i.e. making a transition from CO covered surface to the oxidic surface, the work functions of surface oxide on Pd(100) and Pt(110) display opposite behavior. |
| first_indexed | 2024-12-20T12:17:49Z |
| format | Article |
| id | doaj.art-1facabf4972d43929b8e8bfe29ee2f90 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-20T12:17:49Z |
| publishDate | 2019-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-1facabf4972d43929b8e8bfe29ee2f902022-12-21T19:41:05ZengAIP Publishing LLCAIP Advances2158-32262019-01-0191015314015314-810.1063/1.5081066059901ADVOperando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopyYoungseok Yu0Dongwoo Kim1Hojoon Lim2Geonhwa Kim3Yoobin E. Koh4Daehyun Kim5Kohei Ueda6Satoru Hiwasa7Kazuhiko Mase8Fabrice Bournel9Jean-Jacques Gallet10François Rochet11Ethan J. Crumlin12Philip N. Ross Jr.13Hiroshi Kondoh14Do Young Noh15Bongjin Simon Mun16Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaDepartment of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaDepartment of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaDepartment of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaDepartment of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaDepartment of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, JapanDepartment of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, JapanDepartment of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, JapanInstitute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, JapanSorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement – Campus Pierre et Marie Curie, F-75005 Paris, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement – Campus Pierre et Marie Curie, F-75005 Paris, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement – Campus Pierre et Marie Curie, F-75005 Paris, FranceAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USAAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USADepartment of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, JapanDepartment of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaDepartment of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of KoreaThe surface chemical states of Pd(100) during CO oxidation were investigated using ambient pressure x-ray photoelectron spectroscopy and mass spectroscopy. Under the reactant ratio of CO/O2 = 0.1, i.e. an oxygen-rich reaction condition, the formation of surface oxides was observed with the onset of CO oxidation reaction at T = 525 K. As the reactant ratio (CO/O2) increased from 0.1 to 1.0, ∼ 90 % surface oxides remains on surface during the reaction. Upon the formation of surface oxides, the core level shift of oxygen gas phase peak was observed, indicating that change of surface work function. As CO oxidation takes places, i.e. making a transition from CO covered surface to the oxidic surface, the work functions of surface oxide on Pd(100) and Pt(110) display opposite behavior.http://dx.doi.org/10.1063/1.5081066 |
| spellingShingle | Youngseok Yu Dongwoo Kim Hojoon Lim Geonhwa Kim Yoobin E. Koh Daehyun Kim Kohei Ueda Satoru Hiwasa Kazuhiko Mase Fabrice Bournel Jean-Jacques Gallet François Rochet Ethan J. Crumlin Philip N. Ross Jr. Hiroshi Kondoh Do Young Noh Bongjin Simon Mun Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy AIP Advances |
| title | Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy |
| title_full | Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy |
| title_fullStr | Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy |
| title_full_unstemmed | Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy |
| title_short | Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy |
| title_sort | operando study of pd 100 surface during co oxidation using ambient pressure x ray photoemission spectroscopy |
| url | http://dx.doi.org/10.1063/1.5081066 |
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