多孔石墨烯限域的 Fe-K 作为高效催化剂用于 CO 直接加氢制低碳烯烃。
Porous Graphene-Confined Fe-K as Highly Efficient Catalyst for CO Direct Hydrogenation to Light Olefins.
机构信息
Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Fudan University , Shanghai 200433 , P. R. China.
Key Laboratory of Nuclear Analysis Techniques, Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201800 , P. R. China.
出版信息
ACS Appl Mater Interfaces. 2018 Jul 18;10(28):23439-23443. doi: 10.1021/acsami.8b05411. Epub 2018 Jul 2.
We devised iron-based catalysts with honeycomb-structured graphene (HSG) as the support and potassium as the promoter for CO direct hydrogenation to light olefins (CO-FTO). Over the optimal FeK1.5/HSG catalyst, the iron time yield of light olefins amounted to 73 μmol g s with high selectivity of 59%. No obvious deactivation occurred within 120 h on stream. The excellent catalytic performance is attributed to the confinement effect of the porous HSG on the sintering of the active sites and the promotion effect of potassium on the activation of inert CO and the formation of iron carbide active for CO-FTO.
我们设计了一种以具有蜂窝状结构的石墨烯（HSG）为载体、钾为促进剂的铁基催化剂，用于 CO 直接加氢制轻烯烃（CO-FTO）。在最优的 FeK1.5/HSG 催化剂上，铁的轻烯烃时空收率达到 73 μmol g s，选择性高达 59%。在 120 小时的连续运行中，没有明显的失活现象。优异的催化性能归因于多孔 HSG 对活性位烧结的限制作用和钾对惰性 CO 活化以及对 CO-FTO 活性的碳化铁形成的促进作用。
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