乙酰丙酸
催化作用
氧化物
材料科学
催化加氢
化学工程
化学
无机化学
有机化学
工程类
作者
Shanshan Wang,Zewen Zhuang,Xin Chen,Yu Wang,Xiaoxian Li,Mei Yang,Youqing Wu,Qing Peng,Chen Chen,Yadong Li
出处
期刊:Small
[Wiley]
日期:2023-10-08
卷期号:20 (7)
被引量:1
标识
DOI:10.1002/smll.202306227
摘要
γ-valerolactone (GVL) is a key value-added chemical catalytically produced from levulinic acid (LA), an important biomass derivative platform chemical. Here an ultra-efficient 3D Ru catalyst generated by in situ reduction of RuZnOx nanoboxes is reported; the catalyst features a well-defined structure of highly dispersed in situ oxide-derived Ru (IOD-Ru) clusters (≈1 nm in size) spatially confined within the 3D nanocages with rich mesopores, which guarantees a maximized atom utilization with a high exposure of Ru active sites as well as a 3D accessibility for substrate molecules. The IOD-Ru exhibits ultrahigh performance for the hydrogenation of LA into GVL with a record-breaking turnover frequency (TOF) up to 59400 h-1 , 14 times higher than that of the ex situ reduction of RuZnOx nanoboxes catalyst. Structural characterizations and theoretical calculations collectively indicate that the defect-rich and coordination-unsaturated IOD-Ru sites can boost the activation of the carbonyl group in LA with a significantly lowered energy barrier of hydrogenation.
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