@article{c4ff1138d50742f4ad8c2acae93f416a,
title = "Highly dispersive Au nanoparticles on TiO2 nanofibers as a supported catalyst synthesized from Al-Ti-Au intermetallic compound",
abstract = "In the present study, we highly dispersed the Gold nanoparticles onto TiO2 nanofibers from leached Al-Ti-Au intermetallic compounds (IMCs) as a catalyst. The IMCs have an ordered structure, which could let the substitutional Au atoms neighboring to Ti atoms in IMC structure. The Al-based IMC single phase was proposed to obtain a high specific area and highly dispersive Au nanoparticles instead of the solid solution after leaching. Therefore, single phase L12-Al67Ti25Au8 was prepared and homogenized by arc-melting and conducted annealing. The ingot of L12-Al67Ti25Au8 was crushed and gathered under 25 µm as precursors. The leaching processes were using the aq. NaOH and aq. HCl. The removal Al of the precursors achieved 95%, and exhibits the special urchin-like particles with TiOx nanofibers. The urchin-like morphology provided a high surface area. After heat treatment, the TiOx transformed to the anatase TiO2 at 500 °C for 2 h under the air or CO/O2/He. The TEM images showed lots of Gold nanoparticles dispersing homogeneously onto the TiOx nanofibers. The CO conversion efficiency of Au/TiO2 was 50% at 50 °C without heat-treatment. Although the contribution mainly attributed to Au nanoparticles, Au/TiO2 exhibited significantly higher catalytic activity than Au/TiOx composite. The CO oxidation activity Au/TiO2 could reach up to 98% when as lower as 50 °C.",
keywords = "Au/TiO, Catalysis, Intermetallic compound, L1 phase, Leaching",
author = "Liu, {Yi Xin} and Satoshi Ohhashi and Satoshi Kameoka and Tsai, {An Pang}",
note = "Funding Information: The authors are grateful to Dr. Masahiko Shimoda (NIMS, Japan), Dr. Shigenori Ueda (NIMS, Japan), Professor Kazuya Kobiro (Kochi University of Technology, Japan), Mr. Jhong-Ren Huang (IMRAM Tohoku University, Japan) for fruitful discussions, Mr. Shun Ito and Mr. Eiji Aoyagi (IMR Tohoku University, Japan) for TEM observations. The HAXPES measurements at BL15XU of SPring-8 were performed with the approval of the NIMS Synchrotron X-ray Station (Proposal Nos. 2018A4910, 2018B4912, 2019A4906). This work was supported financially by Grants-in-Aid for Scientific Research [(A) 15H02299, (B) 18H01783] from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan, NIMS microstructural characterization platform as a program of “Nanotechnology Platform” (Project No. 12024046), and “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials.” Funding Information: The authors are grateful to Dr. Masahiko Shimoda (NIMS, Japan), Dr. Shigenori Ueda (NIMS, Japan), Professor Kazuya Kobiro (Kochi University of Technology, Japan), Mr. Jhong-Ren Huang (IMRAM Tohoku University, Japan) for fruitful discussions, Mr. Shun Ito and Mr. Eiji Aoyagi (IMR Tohoku University, Japan) for TEM observations. The HAXPES measurements at BL15XU of SPring-8 were performed with the approval of the NIMS Synchrotron X-ray Station (Proposal Nos. 2018A4910, 2018B4912, 2019A4906). This work was supported financially by Grants-in-Aid for Scientific Research [(A) 15H02299 , (B) 18H01783 ] from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan, NIMS microstructural characterization platform as a program of “Nanotechnology Platform” (Project No. 12024046 ), and “ Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials. ” Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",
year = "2020",
month = jan,
day = "16",
doi = "10.1016/j.ces.2019.115249",
language = "English",
volume = "211",
journal = "Chemical Engineering Science",
issn = "0009-2509",
publisher = "Elsevier BV",
}