首页|Effect of synthesis time on morphology of CeO2 nanoparticles and Au/CeO2 and their activity in oxidative steam reforming of methanol

Effect of synthesis time on morphology of CeO2 nanoparticles and Au/CeO2 and their activity in oxidative steam reforming of methanol

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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 °C. The Au/CeO2-2 h gave the highest methanol conversion level and hydrogen yield at a low temperature of 250 °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.

Oxidative steam reformingMethanolCeria nanoparticlesGoldSynthesis timeRare earths

Srisin Eaimsumang、Sujitra Wongkasemjit、Sangobtip Pongstabodee、Siwaporn Meejoo Smith、Sukritthira Ratanawilai、Nuwong Chollacoop、Apanee Luengnaruemitchai

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The Petroleum and Petrochemical College, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand

Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand

Center of Sustainable Energy and Green Materials and Department of Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Road, Salaya, NakornPathom 73170, Thailand

Department of Chemical Engineering, Faculty of Engineering, Prince of Songkla University, Songkla 90112, Thailand

Renewable Energy Laboratory, National Metal and Materials Technology Center (MTEC), 114 Thailand Science Park, Paholyothin Rd., Klong 1, KlongLuang, Pathumthani 12120, Thailand

Center of Excel ence in Catalysis for Bioenergy and Renewable Chemicals (CBRC), Chulalongkorn University, Bangkok 10330, Thailand

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Project supported by the Ratchadaphiseksomphot Endow-ment Fundand the Thammasat University Research Fund under the Research University Network Initiative

Chulalongkorn University CU-GES-60-04-63-038/2560

2019

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDCSCDSCIEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2019.37(8)
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