Overcoating the Surface of Fe-Based Catalyst with ZnO and Nitrogen-Doped Carbon toward High Selectivity of Light Olefins in CO2 Hydrogenation,Industrial & Engineering Chemistry Research

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Overcoating the Surface of Fe-Based Catalyst with ZnO and Nitrogen-Doped Carbon toward High Selectivity of Light Olefins in CO2 Hydrogenation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-03-04 , DOI: 10.1021/acs.iecr.8b05478
Junhui Liu ₁ , Anfeng Zhang ₁ , Xiao Jiang ₂ , Guanghui Zhang ₁ , Yanwei Sun ₁ , Min Liu ₁ , Fanshu Ding ₁ , Chunshan Song _{1,

3} , Xinwen Guo ₁

Affiliation

ZnO and nitrogen-doped carbon (NC) overcoated Fe-based catalysts (Fe@NC) were synthesized and evaluated in CO₂ hydrogenation reaction. The Fe@NC exhibited enhanced catalytic activity, stability, and high selectivity toward light olefins and C₅₊ hydrocarbons. The olefins over paraffins ratio in the range of C₂–C₄ increased 24 times from 0.07 to 1.68 compared with the benchmark Fe₃O₄ catalyst. The evolution of iron species was observed during the hydrogenation reaction. The inactive θ-Fe₃C phase disappeared, and the active phases for CO₂ hydrogenation, Fe₃O₄ and Fe₅C₂, formed during the hydrogenation reaction. Overcoating the surface of Fe-based catalysts can be used as a useful strategy to modulate the product selectivity toward sustainable production of value-added hydrocarbons from CO₂.

中文翻译：

ZnO和氮掺杂的碳在Fe基催化剂的表面覆盖，对CO ₂加氢中轻烯烃的高选择性

合成了ZnO和氮掺杂碳（NC）包覆的Fe基催化剂（Fe @ NC），并在CO ₂加氢反应中进行了评估。Fe @ NC对轻质烯烃和C ₅₊烃具有增强的催化活性，稳定性和高选择性。与基准Fe ₃ O ₄催化剂相比，C ₂ -C ₄范围内的烯烃与链烷烃之比从0.07增至1.68 24倍。在氢化反应过程中观察到铁的放出。无活性的θ-的Fe ₃ C相消失，而对于CO的活性相₂氢化，铁₃ ö ₄和Fe ₅在氢化反应期间形成的C ₂。铁基催化剂表面的覆盖层可以用作调节产品选择性以实现从CO ₂可持续生产增值烃的有用策略。

更新日期：2019-03-05

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