The effect of alkaline earth metals Ca, Mg on Cu–Fe catalysts synthesized by solvothermal method and their CO2 hydrogenation performance

Cai, Zhenyu; Zhang, Fenglei; He, Zhipeng; Cao, Xinjie; Zhang, Lei; Huang, Kai

doi:10.1016/j.solidstatesciences.2022.107015

Cited by 2 publications

(3 citation statements)

References 44 publications

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“…Still, the CO 2 conversion rate is significantly reduced when the force between Ca and Fe increases. This result is similar to our previous research [46] . In addition, the Fe−C content in the Fe phase was correlated with the Ca doping amount, and the Fe−C content in each catalyst was ranked as follows: Ca0.5Zn9.5Fe20 (15.99 %)>Zn10Fe20 (11.97 %)>Ca1Zn9Fe20 (10.16 %)>Ca1.5Zn8.5Fe20 (9.96 %).…”

Section: Resultssupporting

confidence: 89%

“…In our group‘s previous study, [45] it was found that Zn doping was more effective than other transition metal doping in improving the performance of Fe catalysts. A subsequent study [46] also found that a small amount of alkaline earth metal doping has the same effect on the Fe catalyst. However, the impact of alkaline earth metal doping on Fe catalyst is unclear.…”

Section: Introductionmentioning

confidence: 83%

“…This result is similar to our previous research. [46] In addition, the FeÀ C content in the Fe phase was correlated with the Ca doping amount, and the FeÀ C content in each catalyst was ranked as follows: Ca0.5Zn9.5Fe20 (15.99 %) > Zn10Fe20 (11.97 %) > Ca1Zn9Fe20 (10.16 %) > Ca1.5Zn8.5Fe20 (9.96 %). Therefore, the doping of Ca changes the Fe composition in the spent catalyst to some extent, and the FeÀ C content decreases with the increase of Ca doping.…”

Section: Catalysts X Co2 [%] S Co [%]mentioning

confidence: 99%

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The Effect Of Ca Doping On The CO2 Hydrogenation Performance Of CaxZn10‐xFe20 Catalysts (x=0, 0.5, 1 and1.5)

Cai

Zhang

Cao

et al. 2023

Chemistry An Asian Journal

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In this paper, CaxZn10-xFe20 catalysts were prepared by the co-precipitation method and applied to CO 2 hydrogenation. The experimental results show that the CO 2 conversion of the catalyst Ca1Zn9Fe20 at a Ca doping amount of 1 mmol can reach 57.91 %, which is 13.5 % more than the CO 2 conversion of the catalyst Zn10Fe20. Moreover, the catalyst Ca1Zn9Fe20 has the lowest selectivity for both CO and CH 4, with 7.40 % and 6.99 %, respectively. The catalysts were characterized by XRD, N 2 adsorption-desorption, CO 2 -TPD, H 2 -TPR, and XPS. The results demonstrate that the doping of Ca increases the basic sites on the catalyst surface and thus allows the catalyst to adsorb more CO 2 to promote the reaction. Besides, the Ca doping amount of 1 mmol can suppress the formation of graphitic carbon on the catalyst surface and prevent the excess graphitic carbon from covering the active site Fe 5 C 2 .