Facile template-free synthesis of Ni-SiO2catalyst with excellent sintering- and coking-resistance for dry reforming of methane
Facile template-free synthesis of Ni-SiO2catalyst with excellent sintering- and coking-resistance for dry reforming of methane
复制标题
轻松无模板合成具有优异抗烧结性和抗结焦性的 Ni-SiO2 催化剂，用于甲烷干重整
DOI：
10.1016/j.catcom.2019.105782
复制
发表时间：
2019
影响因子：
3.7
通讯作者：
Ning Ping
中科院分区：
文献类型：
--
作者：
Zhang Qiulin;Tang Tong;Wang Jing;Sun Menghan;Wang Huimin;Sun Haiyang;Ning Ping
以廉价的硅溶胶为前驱体，采用氨辅助的无模板水热法合成了Ni-SiO2催化剂，并成功应用于甲烷干重整反应。结果表明，纳米Ni颗粒粒径在3.2nm左右，分散性好，粒径分布均匀。原位氨辅助过程产生的强金属-载体相互作用进一步稳定了DRM反应期间的Ni物种。在700 °C下反应30 h后，Ni-SiO2催化剂仍保持较高的活性、稳定性和H2/CO比。在废催化剂上几乎没有观察到金属生长和碳沉积。
Ni-SiO2catalysts were synthesized by facile template-free hydrothermal method with ammonia-assisted via using low-cost silica sol as precursor and successfully employed to dry reforming of methane reaction. It was found that ultra-small Ni nanoparticles around 3.2 nm rationally obtained with high dispersion. The strong metal-support interaction generated from thein-situammonia-assisted process further stabilized the Ni species during the DRM reaction. Furthermore, the high activity, stability and H2/CO ratio of Ni-SiO2remained initial value even continued reacting at 700 °C for 30 h. Almost no visualization of metal growth and carbon deposition were observed on the spent catalyst.