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Gold nanoparticles deposited on surface modified carbon materials as reusable catalysts for hydrocarboxylation of cyclohexane
Applied Catalysis A: General ( IF 5.5 ) Pub Date : 2017-08-26 , DOI: 10.1016/j.apcata.2017.08.028
A.P.C. Ribeiro , L.M.D.R.S. Martins , S.A.C. Carabineiro , J.L. Figueiredo , A.J.L. Pombeiro

Gold nanoparticles were deposited on different carbon materials and used as catalysts for the alkane hydrocarboxylation reaction. Cyclohexane hydrocarboxylation to cyclohexanecarboxylic acid was carried out in the presence of CO and water, peroxodisulfate, in water/acetonitrile medium, at ca. 50 °C, with gold nanoparticles deposited by a colloidal method on carbon nanotubes and activated carbon with three different surface chemistries: in their original forms (CNT or AC, respectively), oxidized with HNO3 (-ox) or oxidized with HNO3 and subsequently treated with NaOH (-ox-Na). Au/CNT-ox-Na was the best catalyst, yielding cyclohexanecarboxylic acid up to 88.2% yield, with excellent recyclability (97.5% of the initial activity was maintained after five consecutive catalytic cycles).



中文翻译:

沉积在表面改性的碳材料上的金纳米颗粒,可作为可重复使用的环己烷加氢羧化催化剂

金纳米颗粒沉积在不同的碳材料上,并用作烷烃加氢羧化反应的催化剂。在CO和水,过二硫酸盐的存在下,在水/乙腈介质中,在约70℃下,将环己烷加氢羧化为环己烷羧酸。50°C,通过胶体法将金纳米颗粒沉积在碳纳米管和具有三种不同表面化学性质的活性炭上:分别处于原始形式(分别为CNT或AC),被HNO 3(-ox)氧化或被HNO 3和HNO 3氧化随后用NaOH(-ox-Na)处理。Au / CNT-ox-Na是最好的催化剂,环己烷羧酸的收率高达88.2%,具有出色的可循环性(在连续五个催化循环后保持97.5%的初始活性)。

更新日期:2017-08-26
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