Search

Noble‐metal aerogels (NMAs) have drawn increasing attention because of their self‐supported conductive networks, high surface areas, and numerous optically/catalytically active sites, enabling their impressive performance in diverse fields. However, the fabrication methods suffer from tedious procedures, long preparation times, unavoidable impurities, and uncontrolled multiscale structures, discouraging their developments. By utilizing the self‐healing properties of noble‐metal aggregates, the freezing‐promoted salting‐out behavior, and the ice‐templating effect, a freeze–thaw method is crafted that is capable of preparing various hierarchically structured noble‐metal gels within one day without extra additives. In light of their cleanliness, the multi‐scale structures, and combined catalytic/optical properties, the electrocatalytic and photoelectrocatalytic performance of NMAs are demonstrated, which surpasses that of commercial noble‐metal catalysts. [ABSTRACT FROM AUTHOR]

Keywords: electrochemistry; gels; nanostructures; photocatalysis; sol-gel process EN electrochemistry gels nanostructures photocatalysis sol-gel process 8379 8379 1 05/13/20 20200518 NES 200518 B Edelmetall-Aerogele b wurden durch die Harmonisierung von Gefrier-Tau- und Gefrier-Guss-Methoden hergestellt, wie R. Du, A. Eychmüller et al. in in ihrem Forschungsartikel auf S. 8370 beschreiben. Durch die intrinsischen Eigenschaften der nanostrukturierten Edelmetalle und den Eistemplateffekt zeigen die resultierenden Metall-Aerogele eindrucksvolle elektrokatalytische und photoelektrokatalytische Aktivitäten in der Ethanol-Oxidation. Electrochemistry, gels, nanostructures, photocatalysis, sol-gel process. [Extracted from the article]