Direct solution-based reduction synthesis of Au, Pd, and Pt aerogels
| Autor: | Fred J Burpo, Jesse L. Palmer, Lauren A. Morris, Joshua P. McClure, Madeline Y Ryu, Enoch A. Nagelli |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Dielectric spectroscopy chemistry.chemical_compound Sodium borohydride chemistry Mechanics of Materials Specific surface area engineering General Materials Science Noble metal Cyclic voltammetry 0210 nano-technology Platinum Dimethylamine Palladium |
| Zdroj: | Journal of Materials Research. 32:4153-4165 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2017.412 |
| Popis: | Gold, palladium, and platinum aerogels were prepared by a rapid, direct solution-based reduction synthesis with densities of 0.54, 0.065, and 0.055 g/cm3, respectively. Salt solutions were reduced at 1:1 (v/v) with dimethylamine borane and sodium borohydride to rapidly form gels within seconds to minutes above a threshold salt concentration and were then rinsed and freeze dried. Au, Pd, and Pt aerogels had no presence of oxide phases confirmed by X-ray diffractometry. Specific surface areas determined with gas physisorption were 3.06, 15.43, and 20.56 m2/g for Au, Pd, and Pt. Electrochemically determined specific capacitances using electrochemical impedance spectroscopy and cyclic voltammetry were 2.18, 4.13, and 4.20 F/g, and 2.67, 7.99, and 5.12 F/g for Au, Pd, and Pt, respectively. The rapid synthesis, high solvent accessible specific surface area, conductivity, and capacitance make these noble metal aerogels candidates for many of catalytic, energy, and sensor applications. |
| Databáze: | OpenAIRE |
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