Abstract: This study investigates the catalytic conversion of ethanol over novel carbon nanofiber (CNF)-supported K-promoted Co–Ñi-MoS2/CNF catalysts (where Ñi is the nickel particle from the support), demonstrating how the support materials and metal composition govern product selectivity. The K–Ñi-MoS2/CNF system exhibited exceptional ethanol conversion (70.5%, with 37.73% ethyl acetate selectivity, nearly double that of cobalt-containing counterparts), while maintaining only 7.94% acetaldehyde formation. Remarkably, characterization data and performance trends suggest nickel (Ñi) migration from carbon nanofiber supports may form active K-NiMoS structures, consistent with observed enhancements in catalytic activity and reduced particle aggregation. This phenomenon aligns with established benefits of nickel promotion, explaining the superior performance of CNF-supported systems compared to conventional activated carbon catalysts. Density functional theory (DFT) calculations were employed to probe electronic structure changes on introduction of nickel (from carbon nanofibers) into K-CoMoS active phase, using projected density of states (PDOS) near the Fermi level across varying promoter configurations (Co/Ni) as an indicator. Nickel incorporation was found to consolidate Co-localized d-states below the Fermi level into a single peak, enhancing electron back-donation while simultaneously reducing Lewis acidity.

Cite: Osman M.E. , Permyakov E.A. , Repev N.A. , Kogan V.M.
Catalytic Conversion of Ethanol over Supported MoS 2 Catalysts: Enhancing Activity Using Novel Nickel-Containing Carbon Nanofiber Materials
Energy & Fuels. 2025. V.39. N46. P.22398–22415. DOI: 10.1021/acs.energyfuels.5c04617 WOS Scopus OpenAlex

Identifiers:

Web of science:	WOS:001610031900001
Scopus:	2-s2.0-105022160989
OpenAlex:	W4415982042

Citing:

DB	Citing
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Scopus	Нет цитирований

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