| 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 |
| 金属配比对IrRe催化剂结构及其甘油氢解催化性能的影响 |
| Effect of Ir/Re Mole Ratio on Structure and Activity of Ir-Re/G-6 Catalyst in Glycerol Hydrogenolysis |
| 投稿时间：2018-05-03 修订日期：2018-08-19 |
| DOI： |
| 中文关键词: 铱/铼摩尔配比 铱-铼合金 酸量 甘油氢解 |
| 英文关键词:Ir/Re mole ratio Ir-Re alloy acidity glycerol hydrogenolysis |
| 基金项目:国家自然科学基金（批准号：21106047） |
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| 摘要点击次数: 1449 |
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| 中文摘要: |
| 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. |
| 英文摘要: |
| 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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