Emerging spinel ferrite catalysts for driving CO2 hydrogenation to high-value chemicals

Insights into the Structural Evolution Process of Na/ZnFe2O4 Spinel Catalyst in CO2 Hydrogenation

“…[14] Alkali metal promoters such as Na [15,16] or K [15,17] can improve the catalytic activity by promoting CO 2 adsorption and suppressing surface hydrogenation, thus yielding long-chain hydrocarbons. Moreover, Fe can form a solid solution or alloy with several different secondary metals, such as Co, [18,19] Mn, [20] and Zn; [9,21,22] a bimetallic effect plays an important role in the multicomponent system. It is noteworthy that Zn promoter has been demonstrated to accelerate the FTS reaction and increase stability of the catalysts, to enhance the light olefins selectivity and improve CO 2 adsorption.…”

“…It is noteworthy that Zn promoter has been demonstrated to accelerate the FTS reaction and increase stability of the catalysts, to enhance the light olefins selectivity and improve CO 2 adsorption. [9,21] Although many researchers have found the excellent selectivity of FeÀ Zn bimetallic catalysts in the CO 2 hydrogenation to lower olefins or LAOs, the dynamic structure evolution of various active phase in FeÀ Zn catalysts is still need to be further understood. Herein, Na promoted ZnFe 2 O 4 spinel catalyst was synthesized by a citric acid modified coprecipitation method, and the structural evolution during reduction and reaction was elucidated by various ex-situ /in situ characterization methods.…”

“…Moreover, Fe can form a solid solution or alloy with several different secondary metals, such as Co, [18,19] Mn, [20] and Zn; [9,21,22] a bimetallic effect plays an important role in the multi‐component system. It is noteworthy that Zn promoter has been demonstrated to accelerate the FTS reaction and increase stability of the catalysts, to enhance the light olefins selectivity and improve CO 2 adsorption [9,21] …”

Recent Advances Hydrogenation of Carbon Dioxide to Light Olefins over Iron-Based Catalysts via the Fischer–Tropsch Synthesis

“…The RWGS reaction is adsorptive, whereas the FTS reaction is exothermic, which gives FTS a thermodynamic advantage over MTO . CO 2 -FTS with excellent RWGS performance and high toxicity resistance requires relatively low feed gas composition and purity and has a wider temperature operating range, which makes it suitable for carbon-rich feed gas produced by coal or biomass gasification . Moreover, CO 2 -FTS is mainly a Fe-based catalyst, which is less expensive than Co and Ru catalysts …”

Selective conversion of carbon dioxide into heavy olefins over Ga modified delafossite-CuFeO2

“…The excessive emissions of CO 2 caused by the consumption of fossil resources and other human activities bring serious environmental and ecological issues. 1 Catalytic hydrogenation of CO 2 with renewable H 2 into liquid fuels and commodity chemicals, such as methane, formic acid, methanol, olefin, aromatics and liquid fuels, is a promising route for CO 2 recycling utilization, due to its potential to reduce over-reliance on fossil feedstocks, and realize a circular carbon economy and net-zero emission. 1–4…”