Characterization of a highly sensitive and selective hydrogen gas sensor employing Pt nanoparticle network catalysts based on different bifunctional ligands
| Autor: | Volkmar Zielasek, Daniel Loof, Anmona Shabnam Pranti, Sebastian Kunz, Marcus Bäumer, Walter Lang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Inorganic chemistry Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Methane Catalysis chemistry.chemical_compound Diamine Materials Chemistry Electrical and Electronic Engineering Bifunctional Instrumentation Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Benzidine 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry 0210 nano-technology Selectivity |
| Zdroj: | Sensors and Actuators B: Chemical. 322:128619 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2020.128619 |
| Popis: | A catalytic hydrogen gas sensor of superior sensitivity, selectivity, resolution and dynamic response was developed with catalysts composed of ligand-stabilized Pt nanoparticles. We have characterized different catalysts utilizing the bi-functional ligands trans-1,4-diaminocyclohexane (DACH), 1,5-diaminonaphthalene (DAN), 4,4´´-diamino-p-terphenyl (DATER), benzidine (BEN) and p-phenylene diamine (PDA) for hydrogen gas sensing. A comprehensive evaluation by comparison, with respect to both, structural aspects (TEM and SEM) and gas sensing performance of the 5 types of ligand-linked Pt nanoparticles and non-stabilized Pt nanoparticles was conducted to select the optimized catalysts. From this investigation, DATER-linked Pt nanoparticles appear immensely promising: the sensor is selective to hydrogen and shows extremely high sensitivity, around 400 mV/1% vol., but exhibits no crosssensitivity to methane and ethane. Likewise, sensors with DATER- and DAN-linked Pt nanoparticles can detect down to 0.001 % (10 ppm) alongside 650 ms average response time (t90). |
| Databáze: | OpenAIRE |
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