@article{be597a349f5d4014b0282ea6c944e118,
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}",
note = "Funding Information: This study is supported in part by Basic Science Research Program for support through grants from the National Research Foundation of Korea (NRF) funded by the Korean Government (MOE) (NRF-2015R1A2A2A01004084, NRF-2015K1A3A1A14021261). B. S. Mun would like to acknowledge the supports from SRC (C-AXS, NRF-2015R1A5A1009962) and “GRI (GIST Research Institute)” Project through a grant provided by GIST in 2018. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, Materials Science Division, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 at Lawrence Berkeley National Laboratory. The AP-XPS experiments were performed under the approval of the Photon Factory Program Advisory Committee (PF PAC-2016G128).",
year = "2019",
month = jan,
day = "1",
doi = "10.1063/1.5081066",
language = "English",
volume = "9",
journal = "AIP Advances",
issn = "2158-3226",
publisher = "American Institute of Physics Publising LLC",
number = "1",
}