SiO2-supported Au-Ni bimetallic catalyst for the selective hydrogenation of acetylene
SiO2-supported Au-Ni bimetallic catalyst for the selective hydrogenation of acetylene
复制标题
SiO2负载Au-Ni双金属乙炔选择性加氢催化剂
DOI：
10.1016/s1872-2067(17)62869-9
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发表时间：
2017-08-01
影响因子：
16.5
通讯作者：
Zhang, Tao
中科院分区：
文献类型：
--
作者：
Chai, Mengqian;Liu, Xiaoyan;Zhang, Tao
负载型Au催化剂在乙炔选择加氢反应中表现出很高的乙烯选择性，但其转化率相对较低.添加第二种金属到Au中已被证明是一种有希望的提高其在乙炔加氢中的催化性能的方法。本文合成了SiO2负载的Au-Ni双金属催化剂，并研究了其在乙炔选择加氢反应中的催化性能。Au-Ni双金属催化剂比相应的单金属Au或Ni催化剂表现出更高的催化性能。通过调节还原温度和/或Ni负载量，得到了性能最佳的Au-Ni/SiO2催化剂。透射电子显微镜（TEM）结果表明，Au-Ni双金属颗粒高度分散在SiO2载体上。同时，通过X射线能谱、高分辨透射电镜和原位漫反射红外光谱对催化剂进行了表征，证实了Au-Ni合金的形成，从而促进了Au和Ni在乙炔加氢反应中的协同作用。(C)2017年，中国科学院大连化学物理研究所。Elsevier B. V.出版，保留所有权利。
Supported Au catalysts have been reported to exhibit high ethylene selectivity in the hydrogenation of acetylene, but the conversion is relatively low. Adding a second metal to Au has proven to be a promising approach to enhance its catalytic performance in acetylene hydrogenation. In this work, SiO2-supported Au-Ni bimetallic catalysts were synthesized and investigated in the selective hydrogenation of acetylene. The Au-Ni bimetallic catalysts exhibited much higher catalytic performance than that of the corresponding monometallic Au or Ni catalysts. By tuning the reduction temperature and/or Ni loading, we obtained an Au-Ni/SiO2 catalyst with optimal performance. The results of transmission electron microscopy imaging revealed that the Au-Ni bimetallic particles were highly dispersed on the SiO2 support. Meanwhile, analysis of the bimetallic catalyst by energy-dispersive X-ray spectroscopy, high-resolution transmission electron microscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy demonstrated the formation of Au-Ni alloy, which contributed to the synergistic effect between Au and Ni in the hydrogenation of acetylene. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.