Fan Xuelin, Zerebecki Swen, Du Ran, Hübner René, Marzum Galina, Jiang Guocan, Hu Yue, Barcikowki Stephan, Reichenberger Sven, Eychmüller Alexander
Physical Chemistry, Technische Universität Dresden, Bergstr. 66b, 01069, Dresden, Germany.
Technical Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, 47057, Duisburg, Germany.
Angew Chem Int Ed Engl. 2020 Mar 27;59(14):5706-5711. doi: 10.1002/anie.201913079. Epub 2020 Jan 28.
Noble metal aerogels (NMAs) are an emerging class of porous materials. Embracing nano-sized highly-active noble metals and porous structures, they display unprecedented performance in diverse electrocatalytic processes. However, various impurities, particularly organic ligands, are often involved in the synthesis and remain in the corresponding products, hindering the investigation of the intrinsic electrocatalytic properties of NMAs. Here, starting from laser-generated inorganic-salt-stabilized metal nanoparticles, various impurity-free NMAs (Au, Pd, and Au-Pd aerogels) were fabricated. In this light, we demonstrate not only the intrinsic electrocatalytic properties of NMAs, but also the prominent roles played by ligands in tuning electrocatalysis through modulating the electron density of catalysts. These findings may offer a new dimension to engineer and optimize the electrocatalytic performance for various NMAs and beyond.
贵金属气凝胶（NMAs）是一类新兴的多孔材料。由于包含纳米尺寸的高活性贵金属和多孔结构，它们在各种电催化过程中展现出前所未有的性能。然而，各种杂质，特别是有机配体，在合成过程中常常会参与其中并残留在相应产物中，这阻碍了对NMAs本征电催化性能的研究。在此，从激光产生的无机盐稳定的金属纳米颗粒出发，制备了各种无杂质的NMAs（金、钯和金 - 钯气凝胶）。有鉴于此，我们不仅展示了NMAs的本征电催化性能，还展示了配体通过调节催化剂的电子密度在调控电催化中所起的重要作用。这些发现可能为设计和优化各种NMAs及其他材料的电催化性能提供一个新的维度。
