| Autor: |
Liang, Haoting, Zhao, Qiao, Liu, Shengkun, Wei, Chongyang, Wang, Yidan, Wang, Yue, Huang, Shouying, Ma, Xinbin |
| Zdroj: |
Frontiers of Chemical Science & Engineering; Nov2024, Vol. 18 Issue 11, p1-10, 10p |
| Abstrakt: |
The Fe-Mn bimetallic catalyst is a potential candidate for the conversion of CO2 into value-added chemicals. The interaction between the two metals plays a significant role in determining the catalytic performance, however which remains controversial. In this study, we aim to investigate the impact of tuning the proximity of Fe-Mn bimetallic catalysts with similar nanoparticle size. And its effect on the physicochemical properties of the catalysts and corresponding performance were investigated. It was found that closer Fe-Mn proximity resulted in enhanced CO2 hydrogenation activity and inhibited CH4 formation. The physiochemical properties of prepared catalysts were characterized using X-ray diffraction, H2 temperature programmed reduction, and X-ray photoelectron spectroscopy, revealing that a closer Fe-Mn distance promoted electron transfer from Mn to Fe, thereby facilitating Fe carburization. The adsorption behavior of CO2 and the identification of reaction intermediates were analyzed using CO2-temperature programed desorption and in situ Fourier transform infrared spectroscopy, confirming the intimate Fe-Mn sites contributed to CO2 adsorption and the formation of HCOO* species, ultimately leading to increased CO2 conversion and hydrocarbon production. The discovery of a synergistic effect at the intimate Fe-Mn sites in this study provides valuable insights into the relationship between active sites and promoters. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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