Robust Colloidal Synthesis of Palladium–Gold Alloy Nanoparticles for Hydrogen Sensing
| Autor: | Iwan Darmadi, Kasper Moth-Poulsen, Michal Strach, Alicja Stolaś, Sarah Lerch, Xin Wen, Christoph Langhammer |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Aqueous solution Hydrogen Hydride Dispersity Alloy chemistry.chemical_element Nanoparticle Nanotechnology engineering.material sensors Dissociation (chemistry) chemistry hydrogen engineering nanoparticle synthesis General Materials Science metal nanoparticles colloidal synthesis palladium−gold alloys Research Article Palladium |
| Zdroj: | ACS Applied Materials & Interfaces |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c15315 |
| Popis: | Metal nanoparticles are currently used in a variety of applications, ranging from life sciences to nanoelectronic devices to gas sensors. In particular, the use of palladium nanoparticles is gaining increasing attention due to their ability to catalyze the rapid dissociation of hydrogen, which leads to an excellent response in hydrogen-sensing applications. However, current palladium-nanoparticle-based sensors are hindered by the presence of hysteresis upon hydride formation and decomposition, as this hysteresis limits sensor accuracy. Here, we present a robust colloidal synthesis for palladium-gold alloy nanoparticles and demonstrate their hysteresis-free response when used for hydrogen detection. The obtained colloidal particles, synthesized in an aqueous, room-temperature environment, can be tailored to a variety of applications through changing the size, ratio of metals, and surface stabilization. In particular, the variation of the viscosity of the mixture during synthesis resulted in a highly tunable size distribution and contributed to a significant improvement in size dispersity compared to the state-of-the-art methods. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|