Immobilization of Pt nanoparticles on hydrolyzed polyacrylonitrile-based nanofiber paper
| Autor: | Seong Ho Kong, Soon Yeol Kwon, Dong Geon Jung, EunJu Ra |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Science Dispersity Nucleation 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Article chemistry.chemical_compound Engineering Adsorption Nanoscience and technology Multidisciplinary Polyacrylonitrile 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry Chemical engineering chemistry Nanofiber Electrode Medicine Particle size 0210 nano-technology |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | The electrochemical activity of catalysts strongly depends on the uniform distribution of monodisperse Pt nanoparticles without aggregates. Here, we propose a new hydrolysis-assisted smearing method for Pt loading on a free-standing paper-type electrode. Polyacrylonitrile (PAN)-based nanofiber paper was used as the electrode, and it acted as a Pt support. Hydrolysis of the electrode tripled the number of active nucleation sites for Pt adsorption on the PAN nanofibers, thereby significantly enhancing the wettability of the nanofibers. This facilitated the uniform distribution of Pt nanoparticles without aggregate formation up to 40 wt% (about 0.8 mg/cm2) with a particle size of about 3 nm. The catalytic current of the hydrolyzed Pt electrode in CH3OH/H2SO4 solution exceeded 213 mA/cm2 Pt mg, which was considerably greater than the current was 148 mA/cm2 Pt mg for an unhydrolyzed electrode. |
| Databáze: | OpenAIRE |
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