香兰素
催化作用
加氢脱氧
选择性
化学
氢解
化学工程
双功能
活性炭
材料科学
纳米颗粒
核化学
无机化学
吸附
有机化学
纳米技术
工程类
作者
Ruoyu Fan,Chun Chen,Miaomiao Han,Wanbing Gong,Haimin Zhang,Yunxia Zhang,Huijun Zhao,Guozhong Wang
出处
期刊:Small
[Wiley]
日期:2018-07-29
卷期号:14 (36)
被引量:58
标识
DOI:10.1002/smll.201801953
摘要
Abstract Highly dispersed copper nanoparticles (Cu NPs) supported on activated carbon (AC) are effectively synthesized by one‐pot carbothermal method at temperature range of 400–700 °C. The X‐ray diffraction, transmission electron microscopy, X‐ray photoelectron spectroscopy, and Brunauer–Emmett–Teller analysis reveal that Cu NPs with diameters of 20–30 nm are evenly anchored in carbon matrix. The 15 wt%‐Cu/AC‐600 catalyst (derived at 600 °C) exhibits best bifunctional catalysis of aqueous‐phase hydrodeoxygenation (HDO) and organic‐phase transfer‐hydrogenation reaction (THR) to selectively transform vanillin to 2‐methoxy‐4‐methylphenol (MMP). In HDO of vanillin, the as‐prepared catalyst achieves a 99.9% vanillin conversion and 93.2% MMP selectivity under 120 °C, 2.0 MPa H 2 within 5 h. Meanwhile, near‐quantitative vanillin conversion and 99.1% MMP selectivity are also obtained under 180 °C within 5 h in THR of vanillin by using 2‐propanol as hydrogen donor. The transforming pathways of vanillin are also proposed: vanillin is transformed into MMP via intermediate of 4‐hydroxymethyl‐2‐methoxyphenol in HDO case and by direct hydrogenolysis of vanillin in THR course. More importantly, the activity and the selectivity do not change after 5 cycles, indicating the catalyst has excellent stability. The Cu‐based catalyst is relatively cheap and preparation method is facile, green, and easy scale‐up, thus achieving a low‐cost transformation of biomass to bio‐oils and chemicals.
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