期刊
CHEMICAL ENGINEERING & TECHNOLOGY
卷 40, 期 7, 页码 1242-1246出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201600656
关键词
Crystal size distribution; Polyethyleneimine; Platinum nanoparticles; Reductive crystallization
Sub-10-nm-sized Pt nanoparticles were synthesized by reducing Pt ions with NaBH4, with the addition of polyethyleneimine (PEI) as a protective reagent. Well-dispersed Pt nanoparticles with a narrow size distribution were successfully produced. When lowering the pH of the PEI solution, cubic and tetrahedral nanoparticles were observed, while at a higher pH, only spherical nanoparticles were produced. In addition, by selecting a suitable concentration of PEI, the protective reagent itself can reduce Pt ions to generate Pt nanoparticles with diameters in the range of 12.9-70.7 nm. This shows the potential of one-pot synthesis of Pt nanoparticles by just adding Pt ions and PEI.
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