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Construction of Synergistic Co/CoO Interface to Enhance Hydrogenation Activity of Ethyl Lactate to 1,2‐Propanediol
Ist Teil von
Chemistry, an Asian journal, 2024-03, Vol.19 (6), p.e202301103-n/a
Ort / Verlag
Germany: Wiley Subscription Services, Inc
Erscheinungsjahr
2024
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The development of effective and stable non‐precious catalysts for hydrogenation of ester to diols remains a challenge. Herein, the catalytic hydrogenation of ethyl lactate (EL) to 1,2‐propanediol (1,2‐PDO) with supported Co catalysts derived from layered double hydroxides (LDHs) is investigated. Catalytic tests reveal that LDH‐derived Co catalysts exhibit the best catalytic performance with 98 % of EL conversion and >99 % of 1,2‐PDO selectivity at mild conditions, compared with other Co catalysts (supported on Al2O3, and TiO2) and LDH‐derived Cu catalysts. Due to the strong interaction among Co and Al matrix, the main composition is metallic Co0 and CoO after reduction at 600 °C. Besides, the catalyst shows good recyclability in the liquid phase hydrogenation. The superior catalytic performance can be attributed to the synergistic effect between Co0 and CoO, in which H2 molecule is activated on Co0 and EL is strongly adsorbed on CoO via hydroxyl groups.
A selective and stable hydrogenation of EL to diol is achieved over a bifunctional Co/CoO catalyst derived from CoAl−LDH, where the synergetic catalysts are found to promote the hydrogenation at the unique Co/CoO interfacial structure with the activation of H2 on metallic Co0 and strong adsorption of EL via hydroxyl groups over CoO site.