Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy

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; Hiroshi Kondoh; Do Young Noh; Bongjin Simon Mun

doi:10.1063/1.5081066

Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy

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, Hiroshi Kondoh, Do Young Noh, Bongjin Simon Mun

化学科

研究成果: Article › 査読

16 被引用数 (Scopus)

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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/O ₂ = 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/O ₂ ) 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.

本文言語	English
論文番号	015314
ジャーナル	AIP Advances
巻	9
号	1
DOI	https://doi.org/10.1063/1.5081066
出版ステータス	Published - 2019 1月 1

ASJC Scopus subject areas

物理学および天文学一般

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10.1063/1.5081066

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Yu, Y., Kim, D., Lim, H., Kim, G., Koh, Y. E., Kim, D., Ueda, K., Hiwasa, S., Mase, K., Bournel, F., Gallet, J. J., Rochet, F., Crumlin, E. J., Ross, P. N., Kondoh, H., Noh, D. Y., & Mun, B. S. (2019). Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy. AIP Advances, 9(1), 記事 015314. https://doi.org/10.1063/1.5081066

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title = "Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy",

abstract = " 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/O 2 = 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/O 2 ) 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.",

author = "Youngseok Yu and Dongwoo Kim and Hojoon Lim and Geonhwa Kim and Koh, \{Yoobin E.\} and Daehyun Kim and Kohei Ueda and Satoru Hiwasa and Kazuhiko Mase and Fabrice Bournel and Gallet, \{Jean Jacques\} and Fran{\c c}ois Rochet and Crumlin, \{Ethan J.\} and Ross, \{Philip N.\} and Hiroshi Kondoh and Noh, \{Do Young\} and Mun, \{Bongjin Simon\}",

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doi = "10.1063/1.5081066",

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AU - Yu, Youngseok

AU - Kim, Dongwoo

AU - Lim, Hojoon

AU - Kim, Geonhwa

AU - Koh, Yoobin E.

AU - Kim, Daehyun

AU - Ueda, Kohei

AU - Hiwasa, Satoru

AU - Mase, Kazuhiko

AU - Bournel, Fabrice

AU - Gallet, Jean Jacques

AU - Rochet, François

AU - Crumlin, Ethan J.

AU - Ross, Philip N.

AU - Kondoh, Hiroshi

AU - Noh, Do Young

AU - Mun, Bongjin Simon

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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/O 2 = 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/O 2 ) 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.

AB - 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/O 2 = 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/O 2 ) 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.

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Operando study of Pd(100) surface during CO oxidation using ambient pressure x-ray photoemission spectroscopy

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