Imaging the electrocatalytic activity of single nanoparticles
| Autor: | Lihua Zhang, Ying Gu, Xiaonan Shan, Nongjian Tao, Qihuang Gong, Ismael Díez-Pérez, Wei Wang, Luojia Wang, Jinghong Li, Peter Wiktor, Jin Lu, Shaopeng Wang |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Biomedical Engineering Metal Nanoparticles Nanoparticle Bioengineering Nanotechnology Electrochemical Techniques Condensed Matter Physics Electrochemistry Platinum nanoparticles Catalysis Atomic and Molecular Physics and Optics Electrode General Materials Science Imaging technique Electrical and Electronic Engineering Plasmon Platinum |
| Zdroj: | Nature Nanotechnology. 7:668-672 |
| ISSN: | 1748-3395 1748-3387 |
| DOI: | 10.1038/nnano.2012.134 |
| Popis: | The electrocatalytic properties of nanoparticles depend on their size, shape and composition1,2. These properties are typically probed by measuring the total electrocatalytic reaction current of a large number of nanoparticles, but this approach is time-consuming and can only measure the average catalytic activity of the nanoparticles under study. However, the identification of new catalysts requires the ability to rapidly measure the properties of nanoparticles synthesized under various conditions and, ideally, to measure the electrocatalytic activity of individual nanoparticles. Here, we show that a plasmonic-based electrochemical current-imaging technique3 can simultaneously image and quantify the electrocatalytic reactions of an array of 1.6 × 105 platinum nanoparticles printed on an electrode surface, which could facilitate high-throughput screening of the catalytic activities of nanoparticles. We also show that the approach can be used to image the electrocatalytic reaction current and measure the cyclic voltammograms of single nanoparticles. A plasmonic-based electrochemical current imaging technique can be used to study the electrocatalytic properties of individual platinum nanoparticles. |
| Databáze: | OpenAIRE |
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