| 金属配比对IrRe催化剂结构及其甘油氢解催化性能的影响 |
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| 引用本文： | 任鑫,朱夏杰,张宏,周静红,周兴贵.金属配比对IrRe催化剂结构及其甘油氢解催化性能的影响[J].分子催化,2018,32(5):405-414. |
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| 作者姓名： | 任鑫 朱夏杰 张宏 周静红 周兴贵 |
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| 作者单位： | 华东理工大学化工学院 化学工程联合国家重点实验室, 上海 200237,华东理工大学化工学院 化学工程联合国家重点实验室, 上海 200237,华东理工大学化工学院 化学工程联合国家重点实验室, 上海 200237,华东理工大学化工学院 化学工程联合国家重点实验室, 上海 200237,华东理工大学化工学院 化学工程联合国家重点实验室, 上海 200237 |
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| 基金项目： | 国家自然科学基金（批准号：21106047） |
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| 摘 要： | 采用分步-等体积浸渍法制备了不同Ir/Re摩尔比的Ir-Re/G-6双金属催化剂，并应用于甘油氢解制备1，3-丙二醇反应，利用XRD、TEM、H2-TPR、XPS、NH3-TPD、Py-IR和CO-DRIFTs等手段对催化剂进行了系统表征，探讨了Ir/Re摩尔比对Ir-Re催化剂结构、性质及其催化性能的影响.研究结果表明：Ir/Re摩尔比对Ir-Re双金属催化剂的合金结构和酸性能影响显著，并决定了其甘油氢解催化性能；当Ir/Re摩尔配比为1.0时，能形成高度分散的Ir-Re合金结构催化剂，具有最多的表面Brønsted酸性位（Ir-Re-OH），表现出最高的甘油转化率和较好的1，3-丙二醇选择性.
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| 关 键 词： | 铱/铼摩尔配比 铱-铼合金 酸量 甘油氢解 |
| 收稿时间： | 2018/5/3 0:00:00 |
| 修稿时间： | 2018/8/19 0:00:00 |
Effect of Ir/Re Mole Ratio on Structure and Activity of Ir-Re/G-6 Catalyst in Glycerol Hydrogenolysis |
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| REN Xin,ZHU Xia-jie,ZHANG Hong,ZHOU Jing-hong and ZHOU Xing-gui.Effect of Ir/Re Mole Ratio on Structure and Activity of Ir-Re/G-6 Catalyst in Glycerol Hydrogenolysis[J].Journal of Molecular Catalysis (China),2018,32(5):405-414. |
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| Authors: | REN Xin ZHU Xia-jie ZHANG Hong ZHOU Jing-hong and ZHOU Xing-gui |
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| Institution: | State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China and State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | A series of bimetallic Ir-Re/G-6 catalysts with different Ir/Re mole ratios were synthesized by impregnation method using H2IrCl6 and NH4ReO4 as precursors. The physiochemical properties of the catalysts were investigated by the techniques of X-ray diffraction(XRD), transmission electron microscopy(TEM), H2 temperature-programmed reduction(H2-TPR), X-ray photoelectron spectroscopy(XPS), NH3 temperature-programmed desorption(NH3-TPD), pyridine adsorption Fourier-transform infrared(Py-IR) and in-situ CO adsorption diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFTs). These catalysts were examined in a 100 mL stainless steel autoclave in glycerol hydrogenolysis. Results demonstrated that the Ir/Re mole ratio could greatly impact on the Ir-Re alloy structure and acid density, thus varied activity of the catalysts; When the Ir/Re mole ratio was 1.0, the 4Ir-4Re/G-6 catalyst had the highly dispersed Ir-Re alloy structure and the largest number of surface acid sites, known as Ir-Re-OH, resulting in the best performance in glycerol hydrogenolysis to 1,3-propanediol. |
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| Keywords: | Ir/Re mole ratio Ir-Re alloy acidity glycerol hydrogenolysis |
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