Kwon Jae In, Kim Tae Wan, Park Ji Chan, Yang Jung-Il, Lee Kwan Young
J Nanosci Nanotechnol. 2016 Feb;16(2):1787-92. doi: 10.1166/jnn.2016.11934.
Recently, a convenient melt-infiltration method, using a hydrated metal salt with porous support, was developed to prepare various metal/metal-oxide nanocatalysts. Until now, millimeter-scale, bead-shaped, cobalt egg-shell catalysts have been used to enhance the rate of reactant diffusion and catalyst performance. In the present work, new SiO2@Co/mSiO2 egg-shell nanoreactors (~300 nm) were synthesized with controlled Co content of 10 and 20 wt%. This was accomplished using a selective melt-infiltration process with porous silica shells around solid-silica cores. The SiO2@Co(10 wt%)/mSiO2 egg-shell catalyst that bears small cobalt nanoparticles of -2 nm was successfully employed for the industrially valuable Fischer-Tropsch synthesis reaction, showing the high activity of -8.0 x 10(-5) mol(CO) x gCo(-1) x S(-1).
最近，人们开发了一种便捷的熔融渗透法，该方法使用水合金属盐和多孔载体来制备各种金属/金属氧化物纳米催化剂。到目前为止，毫米级的珠状钴蛋壳催化剂已被用于提高反应物扩散速率和催化剂性能。在本工作中，合成了新的SiO2@Co/mSiO2蛋壳纳米反应器（约300纳米），其钴含量控制在10%和20%（重量）。这是通过在固体二氧化硅核周围使用多孔二氧化硅壳的选择性熔融渗透过程实现的。负载有-2纳米小钴纳米颗粒的SiO2@Co(10%重量)/mSiO2蛋壳催化剂成功应用于具有工业价值的费托合成反应，显示出-8.0×10(-5) mol(CO)×gCo(-1)×S(-1)的高活性。
