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- W4313478615 abstract "A2BO4 perovskite oxides display excellent heterogeneous catalytic performance, yet the development of high-efficient A2BO4 acid-base catalysts still faces great challenges. Herein, we synthesize a series of lanthanum-copper composite oxides (La-Cu-O) with different ratios of La and Cu to investigate the effect of acid-base cooperation on ethylene carbonate (EC) synthesis. The optimal La-Cu-O-1 displays the excellent performance of urea alcoholysis to EC with ethylene glycol (EG) conversion of ∼ 100% and EC selectivity of 96.6% at 140 °C after 7 h, which is much higher than that of lanthanum oxide and copper oxide. Furthermore, La-Cu-O-1 possess higher catalytic stability than commercial catalysts (zinc oxide). Detailed studies indicate that La-Cu-O-1 with the proper acid-base cooperation can improve the hydroxyl (O−H) dissociative adsorption of EG to alkoxide and weaken the dehydration performance of intermediate (hydroxyethyl carbamate) to by-product (2-oxazolidinone), causing the high selectivity of EC. This work not only presents efficient catalysts for the urea alcoholysis, but also upgrades the study on structure-performance relationship in acid-base catalysis." @default.
- W4313478615 created "2023-01-06" @default.
- W4313478615 creator A5005110633 @default.
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- W4313478615 date "2023-03-01" @default.
- W4313478615 modified "2023-10-16" @default.
- W4313478615 title "La2CuO4 perovskite enhanced ethylene carbonate synthesis via tuning the acid-base cooperation" @default.
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- W4313478615 doi "https://doi.org/10.1016/j.mtcomm.2022.105262" @default.
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