Metal Nanoparticle Aerogels

Abstract

Considering the optical properties, electrical conductivity, and high specific surface area, the design of porous metal materials has become a topic of increasing interest due to their potential applications in electrocatalysis or sensor technology. In this regard, wet gels and aerogels are unique solids with extremely low densities, high porosity, and large inner surface areas, which are able to transfer nanoscopic properties into macroscopic materials. Here, we summarize possible strategies for the creation of a variety of self-supported (noble) metal aerogels. We further discuss their outstanding physical and chemical properties as well as the simple control over their composition. Based on these characteristics, we finally present their excellent performance as electrocatalysts as well as sensors and describe various other attractive applications.