An ionic liquid-present hydrothermal method for preparing hawthorn sherry ball shaped palladium (Pd)-based composite catalysts for ethanol oxidation reaction (EOR) |
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| Affiliation: | 1. College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei, 050024, China;2. Institute of Nuclear & New Energy Technology, Beijing Key Lab of Fine Ceramics, College of Chemistry and Materials Science, Tsinghua University, Beijing, 100084, China;1. National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, GRINM Group Co., Ltd., Beijing, 100088, China;2. GRIMAT Engineering Institute Co., Ltd., Beijing, 101407, China;1. School of Materials Science and Engineering, Hebei University of Technology, And Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Tianjin, 300130, China;2. Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, And School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, Shandong, China;3. Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, DK, 8000, Denmark;1. School of Chemistry and Chemical Engineering, Key Laboratory of Electrochemical Energy Conversion Technology and Application, North Minzu University, Yinchuan, 750021, PR China;2. Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, PR China;3. Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan 750021, PR China;1. Eskisehir Technical University, Faculty of Science, Department of Physics, Yunusemre Campus, 26470 Tepebasi, Eskisehir, Turkey;2. Central Research Laboratory, Eskisehir Osmangazi University, Eskisehir, Turkey |
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| Abstract: | For the first time, a hawthorn sherry ball shaped Pd-based composite catalyst for EOR was prepared via an ionic liquid-present two-step hydrothermal method in this work. In the first hydrothermal step, micron-scale solid carbon spheres (MSCS) were fabricated in the presence of glucose, an ionic liquid of 1-butyl-3-methyl tetrafluoroboric acid and one kind of surfactant. And in the second hydrothermal process, sesame like Pd particles were immobilized on the surface of MSCS forming a hawthorn sherry ball shaped Pd-based composite catalyst (denoted as Pd/MSCS) using PdO as the source of Pd. In the course of preparing MSCS, four kinds of surfactants were respectively employed desiring to study the influence of surfactant type on the physicochemical properties of the produced samples. The prepared MSCS and Pd/MSCS were examined majorly by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). It was addressed by SEM images that in the presence of SDS and EDTA, hawthorn sherry ball shaped Pd-based composite catalysts were successfully prepared. XRD and XPS analysis substantially documented that metallic palladium was the main component of the synthesized Pd/MSCS catalysts. The electrocatalytic abilities of the Pd/MSCS catalysts for EOR were examined in 1 M C2H5OH alkaline solution mainly utilizing cyclic voltammetry (CV) and chronoamperometry (CA), illustrating that all produced Pd/MSCS catalysts had an electrocatalytic activity towards EOR, and the forward peak current density of EOR on the catalyst of Pd/MSCS (prepared in the presence of SDS) was 7 times larger, along with 60 mV decrease in the onset potential of EOR, than that on the Pd/MSCS (prepared with CATB) catalyst. Summarily, a very cost-effective and facile method for fabricating hawthorn sherry ball shaped Pd-based composite catalysts towards EOR was created in this work, which was very meaningful not only to the further development of EOR catalysts but also to the exploration of micron-devices. |
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| Keywords: | Hawthorn sherry ball Micron-scale solid carbon spheres Pd-based composite catalyst Hydrothermal method Ethanol oxidation reaction |
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