- Titel
- Structural investigations of Au–Ni aerogels
- Untertitel
- morphology and element distribution
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-943405
- Quellenangabe
- Nanoscale advances
Erscheinungsjahr: 2023
Jahrgang: 5
Heft: 20
E-ISSN: 2516-0230
Artikelnummer: 5487 - Erstveröffentlichung
- 2023
- Abstract (EN)
- The physical properties of nanomaterials are determined by their structural features, making accurate structural control indispensable. This carries over to future applications. In the case of metal aerogels, highly porous networks of aggregated metal nanoparticles, such precise tuning is still largely pending. Although recent improvements in controlling synthesis parameters like electrolytes, reductants, or mechanical stirring, the focus has always been on one particular morphology at a time. Meanwhile, complex factors, such as morphology and element distributions, are studied rather sparsely. We demonstrate the capabilities of precise morphology design by deploying Au–Ni, a novel element combination for metal aerogels in itself, as a model system to combine common aerogel morphologies under one system for the first time. Au–Ni aerogels were synthesized via modified one- and two-step gelation, partially combined with galvanic replacement, to obtain aerogels with alloyed, heterostructural (novel metal aerogel structure of interconnected nanoparticles and nanochains), and hollow spherical building blocks. These differences in morphology are directly reflected in the physisorption behavior, linking the isotherm shape and pore size distribution to the structural features of the aerogels, including a broad-ranging specific surface area (35–65 m² g⁻¹). The aerogels were optimized regarding metal concentration, destabilization, and composition, revealing some delicate structural trends regarding the ligament size and hollow sphere character. Hence, this work significantly improves the structural tailoring of metal aerogels and possible up-scaling. Lastly, preliminary ethanol oxidation tests demonstrated that morphology design extends to the catalytic performance. All in all, this work emphasizes the strengths of morphology design to obtain optimal structures, properties, and (performances) for any material application.
- Andere Ausgabe
- Link zum Artikel, der zuerst in der Zeitschrift „Nanoscale advances” im Verlag Royal Society of Chemistry erschienen ist.
DOI: 10.1039/D3NA00359K - Verweis
- Ergänzendes Material ist unter folgendem Link zu finden.
Link: https://www.rsc.org/suppdata/d3/na/d3na00359k/d3na00359k1.pdf - Freie Schlagwörter (EN)
- Structural investigations, Au–Ni aerogels, morphology, element distribution, nanomaterials
- Klassifikation (DDC)
- 540
- Verlag
- Royal Society of Chemistry, Cambridge
- Förder- / Projektangaben
- Deutsche Forschungsgemeinschaft (DFG)
GRK 2767: Suprakolloidale Strukturen: Von Materialien zu optischen und elektronischen Bauteilen
ID: 451785257 - Bundesministerium für Bildung und Forschung (BMBF)
ID: 03SF0451 - Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-943405
- Veröffentlichungsdatum Qucosa
- 07.11.2024
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY-NC 4.0