Aerobic oxidation of glucose and 1-phenylethanol over gold nanoparticles directly deposited on ion-exchange resins
Aerobic oxidation of glucose and 1-phenylethanol over gold nanoparticles directly deposited on ion-exchange resins
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DOI：
10.1016/j.apcata.2008.10.049
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发表时间：
2009-02
影响因子：
5.5
通讯作者：
T. Ishida;Shinpei Okamoto;Risa Makiyama;M. Haruta
中科院分区：
文献类型：
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作者：
T. Ishida;Shinpei Okamoto;Risa Makiyama;M. Haruta
通过用 NaBH4 或阴离子交换树脂中的表面胺和铵基团还原 HAuCl4 或 Au(en)2Cl3(en=乙二胺)，将金纳米颗粒 (Au NPs) 直接沉积到离子交换树脂上。分子氧氧化葡萄糖和 1-苯基乙醇的催化活性受聚合物载体性质的影响比受 Au NP 尺寸的影响更大，并且按照离子交换树脂的碱度增加。强碱性阴离子交换树脂，如季铵盐 (–N+Me3) 功能化树脂，在 60°C、pH 9.5 条件下，葡萄糖氧化的 TOF（每负载 Au 的反应速率）高达 27,000h−1(7.5s−1)。对于无碱条件下的 1-苯基乙醇，在 60°C 下获得的 TOF 为 60h−1，表明阴离子交换树脂可作为固体碱。
Gold nanoparticles (Au NPs) were deposited directly onto ion-exchange resins by reducing HAuCl4or Au(en)2Cl3(en=ethylenediamine) with NaBH4or with surface amine and ammonium groups in anion-exchange resins. Catalytic activity for the oxidation of glucose and of 1-phenylethanol with molecular oxygen was more greatly influenced by the nature of polymer supports than by the size of Au NPs and increased in the order of the basicity of ion-exchange resins. Strongly basic anion-exchange resins such as quaternary ammonium salt (–N+Me3) functionalized resin exhibited a TOF (the reaction rate per loaded Au) as high as 27,000h−1(7.5s−1) for glucose oxidation at 60°C and at pH 9.5. For 1-phenylethanol under base-free conditions, a TOF of 60h−1was obtained at 60°C, indicating that anion-exchange resins worked as solid bases.