Pd-Ni nanoparticles supported on titanium oxide as effective catalysts for Suzuki-Miyaura coupling reactions
Pd-Ni nanoparticles supported on titanium oxide as effective catalysts for Suzuki-Miyaura coupling reactions
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二氧化钛负载的钯镍纳米粒子作为铃木-宫浦偶联反应的有效催化剂
DOI：
10.1007/s11705-017-1669-4
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发表时间：
2018-03-01
影响因子：
4.5
通讯作者：
Ren, Qilong
中科院分区：
文献类型：
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作者：
Han, Dongxu;Zhang, Zhiguo;Ren, Qilong
我们采用一步还原法成功地制备了一系列Pd-Ni/TiO_2催化剂。在不同Ni和Pd组成的催化剂中，Ni：Pd比为2.95的催化剂活性最好。TEM和EDS分析表明，在纳米二氧化钛粉体表面负载了单分散的钯镍复合纳米粒子。XPS分析表明，Pd以31%的Pd（II）物种和69%的Pd（0）物种存在，并且所有的镍都是Ni（II）。所制备的Pd-Ni/TiO 2催化剂对Suzuki-Miyaura反应的催化活性比相同量的Pd/TiO 2催化剂高，且具有良好的适用性和可重复使用性。
We have successfully prepared a series of Pd-Ni/TiO2 catalysts by a one-step impregnation-reduction method. Among these catalysts with different compositions of Ni and Pd, the one with the Ni:Pd ratio of 2.95 showed the best activity. Small monodispersed Pd-Ni bimetallic nanoparticles were loaded on the surface of titanium oxide nanopowder as confirmed with TEM and EDS mapping. The XPS analysis demonstrated that Pd exists as 31% Pd(II) species and 69% Pd(0) species and all nickel is Ni(II). The prepared Pd-Ni/TiO2 exhibited enhanced catalytic activity compared to an equal amount of Pd/TiO2 for Suzuki-Miyaura reactions together with excellent applicability and reusability.