Cobalt nanoparticles confined in carbon matrix for probing the size dependence in Fischer-Tropsch synthesis
- 影响因子：7.92
- DOI码：10.1016/j.jcat.2018.11.002
- 发表刊物：J. Catal.
- 关键字：Fischer-Tropsch synthesis, Synthesis gas, Product distribution, Cobalt, Size effect, Porous carbon
- 摘要：The size effect of the metallic Co (Co0) over supported catalysts for Fischer-Tropsch synthesis (FTS) has imposed great importance for developing a high-performance catalyst. However, the lack of well-structured catalysts makes the clarification of the intrinsic size-dependence of Co0 still a challenge. In this work, the Co/C catalysts with Co0 particles from 8.4 ± 1.9 to 74.8 ± 11.6 nm were synthesized by well-controlled pyrolysis of ZIF-67. Based on different characterizations, Co/C catalysts via pyrolyzing ZIF-67 above 450 °C were confirmed as Co0 entrapped in partially graphitized carbon matrix polished by a certain amount of pyridinic and graphitic N and a small portion of adsorbed oxygen. Without the limitation of high-temperature reduction and the dispersion-reducibility dependence, the intrinsic size effect of Co0 on the activity and product selectivity of FTS was rigorously revealed, and the critical size was determined to be 10.5 ± 1.9 nm.
- 合写作者：Li-Peng Guo, Si-Yu Yao, Jun Bao, Zhao-Tie, Zhong-wen Liu
- 第一作者：Qun-XingLuo
- 通讯作者：Zhong-WenLiu
- 卷号：369
- 页面范围：143-156
- ISSN号：0021-9517
- 是否译文：否
- 发表时间：2018/11/16
- 发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0021951718304329
