催化作用
钌
介孔材料
碳纤维
苯甲醇
化学
材料科学
胶束
化学工程
无机化学
有机化学
复合数
工程类
复合材料
水溶液
作者
Li Wang,Jiahua Zhao,Pengfei Zhang,Shize Yang,Wangcheng Zhan,Sheng Dai
标识
DOI:10.1002/chem.201901714
摘要
Abstract Ruthenium (Ru)@Ordered mesoporous carbon (OMC) is a key catalyst in fine‐chemical production. In general, the OMC support is prepared by a wet self‐assembly requiring excessive solvent, toxic phenol–aldehyde precursors and a long reaction time, followed by post‐immobilization to load Ru species. Herein, we wish to report a solid‐state, rapid, and green strategy for the synthesis of Ru@OMC with biomass tannin as the precursor. The chemistry essence of this strategy lies in the mechanical‐force‐driven assembly, during which tannin‐metal (Zn 2+ and Ru 3+ ) coordination polymerization and hydrogen‐bonding interactions between tannin‐block copolymer (PEO‐PPO‐PEO, F127) simultaneously occur. After thermal treatment, Ru@OMC catalysts with mesoporous channels, narrow pore‐size distribution (≈7 nm), and high surface area (up to 779 m 2 g −1 ) were directed by F127 micelles. Meanwhile, the Zn 2+ ions dilute Ru 3+ and avoid the sintering of Ru species, resulting in Ru clusters around 1.4–1.7 nm during carbonization (800 °C). Moreover, the Ru@OMC catalyst afforded a good activity (TOF: up to 4170 h −1 ) in the selective oxidation of benzyl alcohol to benzaldehyde by molecular oxygen.
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