Preparation and characterization of a highly dispersed and stable Ni catalyst with a microporous nanosilica support
Preparation and characterization of a highly dispersed and stable Ni catalyst with a microporous nanosilica support
复制标题
微孔纳米二氧化硅载体高分散稳定镍催化剂的制备及表征
DOI：
10.1039/c6ra15358e
复制
发表时间：
2016-08
期刊：
影响因子：
3.9
通讯作者：
Huilin Wan
中科院分区：
文献类型：
--
作者：
Chuanjing Huang;Weizheng Weng;Mingshu Chen;Huilin Wan
通过控制后干燥条件，合成了微孔Stober二氧化硅。以二氧化硅为载体，采用简单的浸渍法成功地制备了高分散的镍催化剂。在浸渍过程中，Ni 2+离子可以进入载体的微孔，还原后形成单分散的Ni纳米颗粒（<3 nm）。XRD、TEM、H2-TPR和XPS结果表明，Stober二氧化硅中的微孔在这种高分散Ni催化剂的制备中起着重要作用。制备的Ni/SiO2催化剂表现出高的催化性能和长期稳定性的甲烷部分氧化（POM）合成气，即使在非常低的金属负载量（1.5重量%）。对于用于POM反应的Ni基和Co基催化剂，迄今为止很少报道这种不利于碳沉积的低金属负载。更重要的是，这一策略为进一步设计具有高分散性和抗烧结能力的其他二氧化硅负载金属催化剂提供了一种简单、低成本的方法。
A microporous Stober silica was synthesized by controlling the post-drying conditions. Using the silica as a support, a highly dispersed Ni catalyst was successfully prepared by a simple impregnation method. During the impregnation process, the Ni2+ cations could access the micropores of the support and they were turned into monodispersed Ni nanoparticles (<3 nm) after reduction. XRD, TEM, H2-TPR and XPS results revealed that the micropores within the Stober silica play an important role in the preparation of such a highly dispersed Ni catalyst. The as-prepared Ni/SiO2 catalyst showed high catalytic performance and long-term stability for the partial oxidation of methane (POM) to synthesis gas, even at a very low metal loading (1.5 wt%). Such a low metal loading, which is not favorable to the carbon deposition, has been seldom reported so far for Ni- and Co-based catalysts for the POM reaction. More importantly, this strategy provides a simple and low cost method for further designing other silica-supported metal catalysts with high dispersion and anti-sintering ability.
登录
查看更多内容
阳离子表面活性剂辅助空心介孔二氧化硅球的选择性蚀刻策略
影响因子：
6.7
作者：
Fang, Xiaoliang;Chen, Cheng;Zheng, Nanfeng
通讯作者：
Zheng, Nanfeng
影响因子：
4.4
作者：
Wan, Quan;Ramsey, Christopher;Baran, George
通讯作者：
Baran, George
影响因子：
3.7
作者：
GALEENER, FL
通讯作者：
GALEENER, FL
影响因子：
7.3
作者：
S. Takenaka;Hiroshi Umebayashi;E. Tanabe;H. Matsune;M. Kishida
通讯作者：
S. Takenaka;Hiroshi Umebayashi;E. Tanabe;H. Matsune;M. Kishida
影响因子：
7.3
作者：
B. Solsona;T. Blasco;J. Nieto;M. L. Peña;F. Rey;A. Vidal-Moya
通讯作者：
B. Solsona;T. Blasco;J. Nieto;M. L. Peña;F. Rey;A. Vidal-Moya