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Structure Evolution of Ni–Cu Bimetallic Catalysts Derived from Layered Double Hydroxides for Selective Hydrogenation of Furfural to Tetrahydrofurfuryl Alcohol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-08-23 , DOI: 10.1021/acs.iecr.2c01624 Xiao Chen 1 , Wenqi Liu 1 , Jingjie Luo 1 , Hongyu Niu 1 , Rongrong Li 1 , Changhai Liang 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-08-23 , DOI: 10.1021/acs.iecr.2c01624 Xiao Chen 1 , Wenqi Liu 1 , Jingjie Luo 1 , Hongyu Niu 1 , Rongrong Li 1 , Changhai Liang 1
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The hydrogenation of furfural containing multifunctional group often needs the high-efficiency cooperation of multiple catalytic active centers, which is greatly determined by the regulation of the surface and interface structure of multicomponent catalytic materials. Based on such circumstance, a series of highly dispersed supported bimetallic Cu–Ni catalysts prepared by the in situ topological transformation of layered double hydroxides have been investigated for the one-pot hydrogenation of furfural. Compared with the supported monometallic Cu and Ni catalysts, the optimized bimetallic Cu1Ni3/MgAlO catalyst presents highly efficient and good selectivity in the hydrogenation of furfural at the bath reactor. The selectivity to tetrahydrofurfuryl alcohol reaches 94.0% with a complete conversion of furfural at 110 °C under 3 MPa of H2 for 3 h. The results of TEM and in situ FT-IR confirm that the Ni-rich Cu–Ni alloy in the Cu1Ni3/MgAlO catalyst generates a strong synergistic effect, which shifts the adsorption configuration of furfural from parallel or vertical adsorption to tilted adsorption so as to significantly improve the catalytic performance. The intrinsic catalytic performances of CuxNiy/MgAlO catalysts indicate that the TOFC═O and TOFC═C values can be balanced through construction of the structure of the catalyst for achieving the synergistic effect between Cu and Ni significantly to enhance the one-pot selective hydrogenation of furfural to tetrahydrofurfuryl alcohol. Additionally, the Cu1Ni3/MgAlO catalyst presents excellent reusability by six-cycle testing. The above results indicate that the Cu1Ni3/MgAlO with the cooperation of multiple catalytic active centers is a promising catalyst for the selective hydrogenation of furfural.
中文翻译：
用于糠醛选择性加氢制四氢糠醇的层状双氢氧化物Ni-Cu双金属催化剂的结构演变
含多官能团糠醛的加氢往往需要多个催化活性中心的高效配合，这很大程度上取决于多组分催化材料的表面和界面结构的调控。基于这种情况，研究了通过层状双氢氧化物原位拓扑转变制备的一系列高度分散的负载型双金属Cu-Ni催化剂用于糠醛的一锅加氢。与负载型单金属Cu和Ni催化剂相比，优化后的双金属Cu 1 Ni 3/MgAl2O催化剂在浴反应器中糠醛加氢中表现出高效和良好的选择性。四氢糠醇的选择性达到 94.0%，糠醛在 110 ℃、3 MPa H 2条件下 3 h 完全转化。TEM和原位FT-IR结果证实，Cu 1 Ni 3 /MgAlO催化剂中的富Ni Cu-Ni合金产生了很强的协同效应，使糠醛的吸附构型从平行或垂直吸附转变为倾斜吸附从而显着提高催化性能。Cu x Ni y /MgAlO催化剂的内在催化性能表明TOF C=O和TOF C=C通过构建催化剂的结构可以平衡这些值，以实现Cu和Ni之间的协同作用，从而显着提高糠醛一锅选择性加氢制四氢糠醇的能力。此外，Cu 1 Ni 3 /MgAlO 催化剂通过六次循环测试表现出优异的可重复使用性。以上结果表明，具有多个催化活性中心的Cu 1 Ni 3 /MgAlO 是糠醛选择性加氢的一种很有前景的催化剂。
更新日期：2022-08-23
中文翻译：
用于糠醛选择性加氢制四氢糠醇的层状双氢氧化物Ni-Cu双金属催化剂的结构演变
含多官能团糠醛的加氢往往需要多个催化活性中心的高效配合，这很大程度上取决于多组分催化材料的表面和界面结构的调控。基于这种情况，研究了通过层状双氢氧化物原位拓扑转变制备的一系列高度分散的负载型双金属Cu-Ni催化剂用于糠醛的一锅加氢。与负载型单金属Cu和Ni催化剂相比，优化后的双金属Cu 1 Ni 3/MgAl2O催化剂在浴反应器中糠醛加氢中表现出高效和良好的选择性。四氢糠醇的选择性达到 94.0%，糠醛在 110 ℃、3 MPa H 2条件下 3 h 完全转化。TEM和原位FT-IR结果证实，Cu 1 Ni 3 /MgAlO催化剂中的富Ni Cu-Ni合金产生了很强的协同效应，使糠醛的吸附构型从平行或垂直吸附转变为倾斜吸附从而显着提高催化性能。Cu x Ni y /MgAlO催化剂的内在催化性能表明TOF C=O和TOF C=C通过构建催化剂的结构可以平衡这些值，以实现Cu和Ni之间的协同作用，从而显着提高糠醛一锅选择性加氢制四氢糠醇的能力。此外，Cu 1 Ni 3 /MgAlO 催化剂通过六次循环测试表现出优异的可重复使用性。以上结果表明，具有多个催化活性中心的Cu 1 Ni 3 /MgAlO 是糠醛选择性加氢的一种很有前景的催化剂。
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