Volume 17, Issue 14 2007302
Research Article

Single-Nanoparticle Coulometry Method with High Sensitivity and High Throughput to Study the Electrochemical Activity and Oscillation of Single Nanocatalysts

Mohan Lin

Mohan Lin

School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Suzhou, 215123 China

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

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Yingke Zhou

Yingke Zhou

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

School of Materials Science and Technology, Xi'an Jiaotong University, Xi'an, 710049 China

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Lingzheng Bu

Lingzheng Bu

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 China

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Chuang Bai

Chuang Bai

School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Suzhou, 215123 China

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

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Muhammad Tariq

Muhammad Tariq

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

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Huihui Wang

Huihui Wang

School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Suzhou, 215123 China

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

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Jinli Han

Jinli Han

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072 China

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Xiaoqing Huang

Xiaoqing Huang

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 China

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Xiaochun Zhou

Corresponding Author

Xiaochun Zhou

School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Suzhou, 215123 China

Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123 China

E-mail: [email protected]

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First published: 14 March 2021
Citations: 9

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.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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