Molybdenum tailored Co0/Co2+ active pairs on a perovskite-type oxide for direct ethanol synthesis from syngas
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Molybdenum tailored Co0/Co2+ active pairs on a perovskite-type oxide for direct ethanol synthesis from syngas
Molybdenum tailored Co0/Co2+ active pairs on a perovskite-type oxide for direct ethanol synthesis from syngas
中国化学工程学报(英文版)2023年59卷第7期 页码:279-289
Affiliations:
Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University,Tianjin,China,300350
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纸质出版:2023
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Yi Wu, Pengfei Song, Ningyan Li, 等. Molybdenum tailored Co0/Co2+ active pairs on a perovskite-type oxide for direct ethanol synthesis from syngas[J]. 中国化学工程学报(英文版), 2023,59(7):279-289.
/Co
Yi Wu, Pengfei Song, Ningyan Li, 等. Molybdenum tailored Co0/Co2+ active pairs on a perovskite-type oxide for direct ethanol synthesis from syngas[J]. 中国化学工程学报(英文版), 2023,59(7):279-289.DOI:
/CoDOI:
Molybdenum tailored Co0/Co2+ active pairs on a perovskite-type oxide for direct ethanol synthesis from syngas
Selective synthesis of ethanol from syngas under the Co-based catalysts is still challenging due to the hard of regulating the active site Co
0
and Co
2+
ratio. In this work
a series of CaTi
0.9-
x
Co
x
Mo
0.1
O
3
(
x
= 0
0.1-0.4) and CaTi
0.7
Co
0.3
O
3
catalysts were prepared by using citric acid complexation method to promote the synthesis of ethanol. It was found that Mo species in the perovskite lattice can regulate the Co
0
and Co
2+
ratio through the domain-limiting effect of perovskite and the degree of Co reduction could be adjusted by changing the Co/Mo molar ratio. Among these investigated catalysts
the total selectivity of alcohols over the catalyst with the optimal Co/Mo ratio CaTi
0.6
Co
0.3
Mo
0.1
O
3
reached 39.1%
with ethanol accounting for 74.7%
which was ascribed to the moderate and tightly bound ratio of dissociative to non-dissociative adsorption sites on the surface and the balance of CH
x
-CH
y
coupling and CO insertion.
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