Solvent-Free Synthesis of Zeolite Crystals Encapsulating Gold-Palladium Nanoparticles for the Selective Oxidation of Bioethanol
Solvent-Free Synthesis of Zeolite Crystals Encapsulating Gold-Palladium Nanoparticles for the Selective Oxidation of Bioethanol
复制标题
无溶剂合成包裹金钯纳米颗粒的沸石晶体用于生物乙醇的选择性氧化
DOI：
10.1002/cssc.201500261
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发表时间：
2015
期刊：
影响因子：
8.4
通讯作者：
Xiao Feng-Shou
中科院分区：
文献类型：
--
作者：
Zhang Jian;Wang Liang;Zhu Longfeng;Wu Qinming;Chen Chunyu;Wang Xiong;Ji Yanyan;Meng Xiangju;Xiao Feng-Shou
生物乙醇转化为有价值产品是生物质转化的一个重要领域。我们证明了通过无溶剂策略成功合成了包裹在S‐1沸石晶体（AuPd@S‐1）内的双金属金-钯（Au-Pd）纳米颗粒。这种策略允许贵金属的高效利用，超过96%的黄金和钯被装载到最终样品中。电子显微镜表征和探针分子的研究证实，Au-Pd纳米颗粒被封装在S‐1晶体中。AuPd@S‐1催化剂对生物乙醇的好氧氧化非常活跃，对乙酸的转化率为100%，选择性为99%。即使在90%的水存在的情况下，催化剂的转化率仍然高于80%，选择性仍然高于95%。更重要的是，AuPd@S‐1催化剂在生物乙醇氧化中表现出优异的稳定性。这些特性对于AuPd@S‐1催化剂的未来实际应用非常重要。
The conversion of bioethanol into valuable products is an important area in the conversion of biomass. We demonstrate the successful synthesis of bimetallic gold–palladium (Au–Pd) nanoparticles encapsulated within S‐1 zeolite crystals (AuPd@S‐1) by a solvent‐free strategy. This strategy allows highly efficient use of the noble metals, with more than 96 % of the gold and palladium being loaded into the final samples. Electron microscopy characterization and investigations with probe molecules confirm that the Au–Pd nanoparticles are encapsulated inside the S‐1 crystals. The AuPd@S‐1 catalyst is very active for the aerobic oxidation of bioethanol, giving 100 % conversion and 99 % selectivity to acetic acid. Even in the presence of 90 % water, the catalyst still gives a conversion higher than 80 % and a selectivity of 95 %. More importantly, the AuPd@S‐1 catalyst exhibits excellent stability in the oxidation of bioethanol. These features are important for future practical applications of the AuPd@S‐1 catalyst.