Unveiling reductant chemistry in fabricating noble metal aerogels for superior oxygen evolution and ethanol oxidation

Ran Du, Jinying Wang, Ying Wang, René Hübner, Xuelin Fan, Irena Senkovska, Yue Hu (), Stefan Kaskel and Alexander Eychmüller ()
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Ran Du: Technische Universität Dresden
Jinying Wang: Purdue University
Ying Wang: Wenzhou University
René Hübner: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research
Xuelin Fan: Technische Universität Dresden
Irena Senkovska: Technische Universität Dresden
Yue Hu: Wenzhou University
Stefan Kaskel: Technische Universität Dresden
Alexander Eychmüller: Technische Universität Dresden

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Amongst various porous materials, noble metal aerogels attract wide attention due to their concurrently featured catalytic properties and large surface areas. However, insufficient understanding and investigation of key factors (e.g. reductants and ligands) in the fabrication process limits on-target design, impeding material diversity and available applications. Herein, unveiling multiple roles of reductants, we develop an efficient method, i.e. the excessive-reductant-directed gelation strategy. It enables to integrate ligand chemistry for creating gold aerogels with a record-high specific surface area (59.8 m2 g−1), and to expand the composition to all common noble metals. Moreover, we demonstrate impressive electrocatalytic performance of these aerogels for the ethanol oxidation and oxygen evolution reaction, and discover an unconventional organic-ligand-enhancing effect. The present work not only enriches the composition and structural diversity of noble metal aerogels, but also opens up new dimensions for devising efficient electrocatalysts for broad material systems.

Date: 2020
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DOI: 10.1038/s41467-020-15391-w

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