贵金属
材料科学
制作
纳米技术
化学工程
电催化剂
催化作用
气凝胶
金属
冶金
化学
电极
电化学
病理
物理化学
工程类
医学
生物化学
替代医学
作者
Ran Du,Jan‐Ole Joswig,René Hübner,Lin Zhou,Wei Wei,Yue Hu,Alexander Eychmüller
标识
DOI:10.1002/anie.201916484
摘要
Abstract 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.
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