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Looking into More Eyes Combining In Situ Spectroscopy in Catalytic Biofuel Upgradation with Composition-Graded Ag–Co Core–Shell Nanoalloys by Paramita Koley; Subhash Chandra Shit; Ylias M. Sabri; Bolla Srinivasa Rao; Lingaiah Nakka; James Tardio; John Mondal is a Engineering article available to read on EtoBox.

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γ-Valerolactone (GVL), which can be generated from levulinic acid (LA), has attained a humongous amount of interest due to its implantation in various fields, which includes fuels and fuel additives. Herein, for the first time, we have sequentially synthesized silver-cobalt core-shell nanoalloy-based catalysts through a simple wet impregnation method for selective conversion of LA to GVL. The highest catalytic proficiency (97.3 LA conversion with 100% GVL selectivity) had been achieved over a composition-graded optimized catalyst, named 5Ag-15Co, under comparatively moderate reaction conditions (150 °C, 1 MPa H 2 pressure). The catalyst structure-activity relationship has been established through an extensive range of in situ spectroscopic characterizations, which included in situ Xray photoelectron spectroscopy (XPS), in situ CO-diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, and in situ attenuated total reflectioninferred (ATR-IR) spectroscopy. The extraordinary catalytic activity could be attributed to the modulation of electronic properties, which is mainly due to the synergistic interaction in the core-shell alloy system, as confirmed from in situ XPS stud

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Author

Paramita Koley; Subhash Chandra Shit; Ylias M. Sabri; Bolla Srinivasa Rao; Lingaiah Nakka; James Tardio; John Mondal

Publisher

American Chemical Society (ACS)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)