期刊
NANO LETTERS
卷 12, 期 9, 页码 4859-4863出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl302358e
关键词
PtPd alloy; dumbbell nanoparticles; electrocatalysis; H2O2 detection
类别
资金
- DOE [DE-FG02-07ER46374]
Dumbbell-like PtxPd100-x-Fe3O4 nanoparticles (NPs) were synthesized and studied for electrocatalytic reduction and sensing of H2O2. In 0.1 M phosphate buffered saline (PBS) solution, the 4-10 nm PtxPd100-x-Fe3O4 NPs showed the Pt/Pd composition-dependent catalysis with Pt48Pd52-Fe3O4 NPs having the best activity. The Pt48Pd52-Fe3O4 NPs were tested for H2O2 detection, and their H2O2 detection limit reached 5 nM, which was suitable for monitoring H2O2 generated from Raw 264.7 cells. These dumbbell-like PtPd-Fe3O4 NPs are the most sensitive probe ever reported and can be used to achieve real-time quantitative detection of H2O2 in biological environment for biological and biomedical applications.
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