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首页> 外文期刊>Chemistry: A European journal >Development of palladium surface-enriched heteronuclear Au-Pd nanoparticle dehalogenation catalysts in an ionic liquid
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Development of palladium surface-enriched heteronuclear Au-Pd nanoparticle dehalogenation catalysts in an ionic liquid

机译：离子液体中钯表面富集异核Au-Pd纳米粒子脱卤催化剂的开发

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摘要

Heteronuclear Au-Pd nanoparticles were prepared and immobilized in the functionalized ionic liquid [C_2OHmim][NTf_2]. The structural and electronic properties of the nanoparticles were characterized by a range of techniques and the surface of the nanoparticles was found to be enriched in Pd. Moreover, the extent of Pd enrichment is easily controlled by varying the ratio of Au and Pd salts used in the synthesis. The heteronuclear nanoparticles were found to be effective catalysts in dehalogenation reactions with no activity observed for the pure Au nanoparticles and only limited activity for the pure Pd nanoparticles. The activity of the heteronuclear nanoparticles may be attributed to charge transfer from Pd to Au and consequently to more efficient reductive elimination.
机译：制备了异核Au-Pd纳米颗粒，并将其固定在功能化离子液体[C_2OHmim] [NTf_2]中。纳米颗粒的结构和电子特性通过一系列技术进行了表征，并且发现纳米颗粒的表面富含Pd。而且，通过改变合成中所用的金和钯盐的比例，可以容易地控制钯的富集程度。发现异核纳米颗粒是脱卤反应中的有效催化剂，对于纯金纳米颗粒没有观察到活性，而对于纯钯纳米颗粒只有有限的活性。异核纳米颗粒的活性可以归因于从Pd到Au的电荷转移，因此归因于更有效的还原消除。

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