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胶原纤维基氮掺杂碳负载Ru催化二苯醚氢解

Hydrogenolysis of Diphenyl Ether Catalyzed by Collagen Fiber based N-doped Carbon Supported Ru

  • 摘要: 利用胶原纤维富含N元素的特点,以胶原纤维为基底,借鉴胶原纤维固化单宁法结合高温碳化,制备了基于胶原纤维的氮掺杂碳负载Ru催化剂,用于木质素催化氢解。红外光谱和X射线光电子能谱分析表明Ru通过与单宁酸的络合作用负载在胶原纤维上,经碳化后形成胶原纤维基碳负载Ru催化剂(Ru/TNC)。扫描电镜、透射电镜和电感耦合等离子体发射光谱分析表明,Ru/TNC具有较低的Ru负载量(1.14%)和丰富孔隙结构,Ru以较小的纳米颗粒形式均匀负载在碳载体表面。二苯醚氢解结果表明,相比传统浸渍法制备氮掺杂碳负载Ru,Ru/TNC具有更好的性能,其催化二苯醚氢解转化率在280 ℃时达100%,且产物均为小分子单体,包括苯(22.2%)、环己烷(27.8%)、环己醇(35.7%)和环己酮(14.3%)。

     

    Abstract: A N-doped carbon supported Ru catalyst based on collagen was prepared by using the immobilized tannin method combined with carbonization. Collagen fiber was chosen as a substrate due to its rich nitrogen content, and the prepared catalyst was used for the hydrogenolysis of lignin. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis showed that Ru was loaded on collagen fiber through the chelation of Ru and tannic acid, and the collagen-based carbon supported Ru catalyst (Ru/TNC) was fabricated after the carbonization. Scanning electron microscopy, transmission electron microscopy and inductively coupled plasma emission spectroscopy revealed that Ru/TNC exhibited a low Ru loading (1.14%) and porous structures. Ru nanoparticles were homogeneously loaded on the surface of carbon support with a low dimension. The hydrogenolysis results of diphenyl ether indicated that Ru/TNC exhibited higher activity as compared with the carbon supported Ru catalyst prepared by traditional impregnation method. The diphenyl ether hydrogenolysis conversion of 100% was achieved if Ru/TNC was used at 280 ℃, and all products were monomers including benzene (22.2%), cyclohexane (27.8%), cyclohexanol (35.7%), and cyclohexanone (14.3%).

     

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