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- W3136135223 abstract "Abstract To explore nanocatalysts with high electro‐catalytic performance and less loading of precious metals, efforts have been made to develop electrochemical methods with high spatial resolution at the single nanoparticle level. Herein, a highly sensitive single‐nanoparticle coulometry method is successfully developed to study the electrochemical activity and oscillation of single PtTe nanocatalysts. Based on microbattery reactions involving the formic acid electro‐oxidation and the deposition of Ag on the single PtTe nanocatalyst surface, this method enables the transition from the undetectable sub‐fA electric signal of the formic acid electro‐oxidation into strong localized surface plasmon resonance scattering signal of Ag detected by dark‐field microscopy. The lowest limiting current for a single nanocatalyst is found to be as low as 25.8 aA. Different trends of activity versus the formic acid concentration and types of activity of the single nanocatalyst have been discovered. Unveiled frequency‐amplitude graph shows that the two electrochemical oscillation modes of low frequency with high amplitude and vice versa coexist in a single PtTe nanocatalyst, indicating the abundantly smooth surfaces and defects of nanocatalysts. This conducted study will open up the new avenue for further behavioral and mechanistic investigation of more types of nanocatalysts in the electrochemistry community." @default.
- W3136135223 created "2021-03-29" @default.
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- W3136135223 date "2021-03-14" @default.
- W3136135223 modified "2023-10-14" @default.
- W3136135223 title "Single‐Nanoparticle Coulometry Method with High Sensitivity and High Throughput to Study the Electrochemical Activity and Oscillation of Single Nanocatalysts" @default.
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- W3136135223 doi "https://doi.org/10.1002/smll.202007302" @default.
- W3136135223 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33719172" @default.
- W3136135223 hasPublicationYear "2021" @default.
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