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

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 re...

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Bibliographic Details
Published in:Science China. Chemistry 2017-09, Vol.60 (9), p.1236-1242
Main Authors: Wei, Fang, Liu, Jian, Zhu, Ya-Nan, Wang, Xiao-Shi, Cao, Chang-Yan, Song, Wei-Guo
Format: Article
Language:English
Subjects:
Ammonia
Aqueous solutions
Catalysis
Catalytic activity
Catechol
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Dopamine
Electron microscopes
Ethanol
Gold
Hydrogenation
Nanoparticles
Nanospheres
Noble metals
Palladium
Photoelectrons
Quinones
Radiation
Reducing agents
Silver
Surfactants
Temperature effects
X ray photoelectron spectroscopy
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Summary: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.
ISSN:1674-7291
1869-1870
DOI:10.1007/s11426-017-9042-x