@article{30ce76558c214e659b27423a88b12e94,
title = "Investigation of selective chemisorption of fcc and hcp Ru nanoparticles using X-ray photoelectron spectroscopy analysis",
abstract = "We investigated the crucial relation between the intrinsic electronic structure and surface chemisorption behavior of prototypical Ruthenium nanoparticles (Ru NPs) by tuning the size (from 2.2 to 5.4 nm) and structure (face centered cubic (fcc) and hexagonal close packed (hcp)). Ru NPs covered with a polyvinylpyrrolidone (PVP) was analysed through the synchrotron-based hard X-ray photoelectron spectroscopy (HAXPES). Core levels (O 1s and C 1s & Ru 3p3/2) and valence band results provide a valuable information about the selective surface interaction of the Ru NPs. Preferential adsorption of CO2, CO and O2 on the surface of fcc Ru 5.4 nm NP have been highlighted. This selective ability of fcc Ru 5.4 nm have been attributed to the existence of intermediate bond strength between the Ru 4d band and the O 2p in the case of the fcc Ru 5.4 nm. Overcrowding effects were introduced to explain surface adsorption depending to the sizes. Thorough analyses of the valence-band maximum (VBM) showed a size dependent for hcp 2.4 nm (−0.14 eV) and 5.4 nm (−0.12 eV) while VBM is fixed at −0.19 eV for all hcp NPs. Electronic and chemical results and explanations are consistent with the catalytic efficiencies recorded on the Ru NPs. The current work provides a new step towards a complete understanding on the catalytic behaviour of metallic alloy nanoparticles based on the Ru.",
author = "Ibrahima Gueye and Jaemyung Kim and Kumara, {L. S.R.} and Anli Yang and Okkyun Seo and Yanna Chen and Chulho Song and Satoshi Hiroi and Kohei Kusada and Hirokazu Kobayashi and Hiroshi Kitagawa and Osami Sakata",
note = "Funding Information: This work was partly supported by ACCEL, Japan Science and Technology Agency (JST) under Grant No. JPMJAC1501. The measurements were performed at SPring-8 with the approval of the NIMS synchrotron X-ray Station at SPring-8 under proposals No. 2013A4908, as part of the project NIMS Nanotechnology Platform (Project No. 12024046, Proposal No. A-13-NM-0009), 2018A4506, and 2018B4504 and were also performed at SPring-8 with the approval of the JASRI under proposal No. 2018A1351. This work was also partly supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan (OS:18K04868). Funding Information: This work was partly supported by ACCEL, Japan Science and Technology Agency (JST) under Grant No. JPMJAC1501 . The measurements were performed at SPring-8 with the approval of the NIMS synchrotron X-ray Station at SPring-8 under proposals No. 2013A4908, as part of the project NIMS Nanotechnology Platform (Project No. 12024046, Proposal No. A-13-NM-0009), 2018A4506, and 2018B4504 and were also performed at SPring-8 with the approval of the JASRI under proposal No. 2018A1351. This work was also partly supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan ( OS:18K04868 ). Publisher Copyright: {\textcopyright} 2019 The Author(s)",
year = "2019",
month = dec,
doi = "10.1016/j.jcat.2019.10.004",
language = "English",
volume = "380",
pages = "247--253",
journal = "Journal of Catalysis",
issn = "0021-9517",
publisher = "Academic Press Inc.",
}