In situ facile loading of noble metal nanoparticles on polydopamine nanospheres via galvanic replacement reaction for multifunctional catalysis

In situ facile loading of noble metal nanoparticles on polydopamine nanospheres via galvanic replacement reaction for multifunctional catalysis
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通过原位取代反应将贵金属纳米颗粒轻松负载在聚多巴胺纳米球上以实现多功能催化

DOI:
10.1007/s11426-017-9042-x
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发表时间:
2017-07
期刊:
Science China Chemistry
影响因子:
--
通讯作者:
Song Wei-Guo
Song Wei-Guo
中科院分区:
其他
文献类型:
--
作者:
Wei Fang;Liu Jian;Zhu Ya-Nan;Wang Xiao-Shi;Cao Chang-Yan;Song Wei-Guo

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在水溶液中,通过原位电偶置换反应,将尺寸较小且相对均匀的贵金属纳米颗粒(Pd、Ag、Pt、Au)负载到聚多巴胺纳米球上。不需要额外的还原剂、表面活性剂或有机溶剂。X射线光电子能谱分析表明,苯二酚含量增加,酚羟基含量减少,表明邻苯二酚基团与贵金属离子发生了电偶置换反应。所制备的PDA/Pd催化剂在苯乙烯加氢反应中表现出较高的催化活性和良好的稳定性。此外,PDA微球保留了光热效应,作为纳米级的加热器,加速了近红外光下的催化反应。
Noble metal nanoparticles (Pd, Ag, Pt, Au) with small and relatively uniform sizes were loaded on polydopamine nanospheres through in situ galvanic replacement reaction in aqueous solution. No additional reductant, surfactant or organic solvent was needed. X-ray photoelectron spectroscopy results revealed that the amount of quinone increased, while the amount of phenolic hydroxyl decreased on PDA nanospheres, indicating that the galvanic displacement reaction occurred between catechol groups and noble metal ions. The as-prepared PDA/Pd exhibited high catalytic activity and excellent stability in styrene hydrogenation. Moreover, PDA spheres retains the photo-thermal effect to serve as a nano-sized heater to accelerate the catalytic reactions under near-infrared illumination.
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