@article{899dd908bf79414e90ae401a2a742a98,
title = " Adsorption state of NO on Ir(111) surfaces under excess O 2 coexisting condition ",
abstract = " Iridium (Ir) exhibits a good efficiency for reduction of NO under excess O 2 coexisting conditions at temperatures higher than 250 °C. On the other hand, the advantage is lost at lower temperatures below 250 °C under O 2 existence, compared to any other platinum group metals. In this study, adsorption behavior of NO on Ir(111) single-crystal surfaces under excess O 2 coexisting conditions at the temperatures from room temperature to 250 °C has been studied by in-situ X-ray Photoelectron Spectroscopy (XPS). It is revealed that the coexisting O 2 induces formation of a high-density chemisorbed atomic oxygen (O) phase and the atomic O phase suppresses adsorption of NO at on-top sites significantly, which suggests that the suppression of NO adsorption causes a decrease in the ability of NO reduction at the lower temperatures. ",
keywords = "In-situ observation, Ir(111), NAP-XPS, NO adsorption, Oxygen effects",
author = "H. Ikeda and Y. Koike and K. Shiratori and K. Ueda and N. Shirahata and Kazuhisa Isegawa and R. Toyoshima and S. Masuda and K. Mase and T. Nito and H. Kondoh",
note = "Funding Information: We thank the Photon Factory staffs for their technical supports. This study was supported partly by the Grants-in-Aid for scientific research (Nos. 20245004 and 26248008). The experiments were performed as the facility use at the Photon Factory (2015Y031). We thank Dr E. Mitsuda, Dr T. Baba, and Dr Y. Kawamura of Toyota Motor Corporation, for assistance with the computational modeling in this study. Funding Information: We thank the Photon Factory staffs for their technical supports. This study was supported partly by the Grants-in-Aid for scientific research (Nos. 20245004 and 26248008). The experiments were performed as the facility use at the Photon Factory (2015Y031). We thank Dr E. Mitsuda, Dr T. Baba, and Dr Y. Kawamura of Toyota Motor Corporation , for assistance with the computational modeling in this study. ",
year = "2019",
month = jul,
doi = "10.1016/j.susc.2019.01.015",
language = "English",
volume = "685",
pages = "1--6",
journal = "Surface Science",
issn = "0039-6028",
publisher = "Elsevier",
}