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Journal articles
X-ray Photoelectron Spectroscopy Surface Quantification of Sulfided CoMoP Catalysts – Relation Between Activity and Promoted Sites – Part I: Influence of the Co/Mo Ratio
Abstract : This work is dedicated to the characterization of CoMoP/Al2O3 hydrotreatment catalysts. In order to identify the neighboring of cobalt and molybdenum, X-ray photoelectron spectroscopy (XPS), transmission electron spectroscopy (TEM) and activity measurements were used. Indeed, a quantitative XPS characterization was developed to study the effect of the Co/Mo atomic ratio on CoMoP-type hydrodesulfurization catalysts.
Identification and quantification of the various species present on the
surface of the catalysts were performed. We showed that the catalyst exhibiting both the maximum activity in hydrogenation of toluene
and the maximum amount of CoMoS active, determined through the XPS
quantitative analysis, is the catalyst with a Co/Mo atomic ratio equal to 0.5. However, all the cobalt atoms are not completely engaged
in the CoMoS mixed phase.
Cited literature [16 references]
https://hal-ifp.archives-ouvertes.fr/hal-02005560
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Submitted on : Monday, February 4, 2019 - 11:01:28 AM
Last modification on : Wednesday, October 20, 2021 - 9:58:18 AM
Long-term archiving on: : Sunday, May 5, 2019 - 1:23:23 PM
Contributor : Edp Sciences Connect in order to contact the contributor
Submitted on : Monday, February 4, 2019 - 11:01:28 AM
Last modification on : Wednesday, October 20, 2021 - 9:58:18 AM
Long-term archiving on: : Sunday, May 5, 2019 - 1:23:23 PM
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ogst06037.pdf
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