期刊
JOURNAL OF RARE EARTHS
卷 37, 期 8, 页码 819-828出版社
ELSEVIER
DOI: 10.1016/j.jre.2018.11.010
关键词
Oxidative steam reforming; Methanol; Ceria nanopartides; Gold; Synthesis time; Rare earths
资金
- Ratchadaphiseksomphot Endowment Fund, Chulalongkorn University [CU-GES-60-04-63-03]
- Thammasat University Research Fund under the Research University Network Initiative [8/2560]
Ceria (CeO2) supports, synthesized by hydrothermal treatment with different synthesis time (CeO2-X h, where X is the synthesis time in h) in the presence of the surfactant cetyltrimethyl ammonium bromide, were used as supports for gold (Au) catalysts. The synthesis time significantly affects the morphological structure and crystallite size of CeO2, where CeO2-2 h has the smallest crystallite size with coexisting nanorods and nanoparticles. Transmission electron microscopy analysis confirms the morphology of CeO2 with distinctive (110), (100) and (111) planes, in agreement with interplanar spacings of 0.19, 0.27 and 0.31, respectively. However, the morphology of CeO2-8 h and CeO2-48 h is mainly a truncated octahedral with crystal planes (111) and (100) accompanied by an interplanar spacing of 0.31 and 0.27 nm, respectively. The CeO2-X h supports and those with a 3 wt% Au loading (Au/CeO2-X h) were investigated in the oxidative steam reforming of methanol at temperatures between 200 and 400 degrees C. The Au/CeO2-2 h gave the highest methanol conversion level and hydrogen yield at a low temperature of 250 degrees C. This superior catalytic performance results from the good interaction between the metal and support and the well-distributed Au species on the CeO2 support. (C) 2019 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据