Highly dispersed cobalt on N-doped carbon nanotubes with improved Fischer–Tropsch synthesis activity
Highly dispersed cobalt on N-doped carbon nanotubes with improved Fischer–Tropsch synthesis activity
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DOI：
10.1016/j.catcom.2014.01.008
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发表时间：
2014-03
影响因子：
3.7
通讯作者：
Tingjun Fu;Zhenhua Li
中科院分区：
文献类型：
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作者：
Tingjun Fu;Zhenhua Li
以N掺杂的碳纳米管（NCNT）为载体制备了Co催化剂（Co/A-NCNT）。酸处理后，纳米碳管的竹节状结构消失，表面缺陷增多，但纳米管的内径和含氮量变化不大。这导致Co在NCNT的空腔内的改善的分散。将Co/A-NCNT催化剂与酸处理过的CNTs负载Co催化剂进行比较，发现Co/A-NCNT催化剂具有较小的比表面积，在费托合成中具有较高的CO转化率和较窄的低碳数烃分布。Co在Co/A-NCNTs中的高分散度是FT合成性能提高的主要原因。
N-doped carbon nanotubes (NCNTs) were used as the support for a Co catalyst (Co/A-NCNTs). After acid treatment, the bamboo-like structure of the NCNTs disappeared and more defects were formed on the surface of the NCNTs; however there was little change in the inner diameter and N content of the nanotubes. This resulted in an improved dispersion of Co inside the cavities of the NCNTs. The Co/A-NCNT catalyst was compared with Co supported on acid treated CNTs, and the Co/A-NCNT catalyst had a smaller surface area and for Fischer–Tropsch (FT) synthesis, it had a higher CO conversion with producing a narrower distribution of low carbon number hydrocarbons. The high Co dispersion in the Co/A-NCNTs is the main reason for the improved FT synthesis performance.