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dc.contributor.author
Liu, Wei
dc.contributor.author
Herrmann, Anne-Kristin
dc.contributor.author
Bigall, Nadja C.
dc.contributor.author
Rodriguez, Paramaconi
dc.contributor.author
Wen, Dan
dc.contributor.author
Oezaslan, Mehtap
dc.contributor.author
Schmidt, Thomas
dc.contributor.author
Gaponik, Nikolai
dc.contributor.author
Eychmüller, Alexander
dc.date.accessioned
2022-08-24T12:03:25Z
dc.date.available
2017-06-11T16:53:47Z
dc.date.available
2022-08-24T12:03:25Z
dc.date.issued
2015-02-17
dc.identifier.issn
0001-4842
dc.identifier.issn
1520-4898
dc.identifier.other
10.1021/ar500237c
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/99822
dc.identifier.doi
10.3929/ethz-b-000099822
dc.description.abstract
Metallic and catalytically active materials with high surface area and large porosity are a long-desired goal in both industry and academia. In this Account, we summarize the strategies for making a variety of self-supported noble metal aerogels consisting of extended metal backbone nanonetworks. We discuss their outstanding physical and chemical properties, including their three-dimensional network structure, the simple control over their composition, their large specific surface area, and their hierarchical porosity. Additionally, we show some initial results on their excellent performance as electrocatalysts combining both high catalytic activity and high durability for fuel cell reactions such as ethanol oxidation and the oxygen reduction reaction (ORR). Finally, we give some hints on the future challenges in the research area of metal aerogels. We believe that metal aerogels are a new, promising class of electrocatalysts for polymer electrolyte fuel cells (PEFCs) and will also open great opportunities for other electrochemical energy systems, catalysis, and sensors. The commercialization of PEFCs encounters three critical obstacles, viz., high cost, insufficient activity, and inadequate long-term durability. Besides others, the sluggish kinetics of the ORR and alcohol oxidation and insufficient catalyst stability are important reasons for these obstacles. Various approaches have been taken to overcome these obstacles, e.g., by controlling the catalyst particle size in an optimized range, forming multimetallic catalysts, controlling the surface compositions, shaping the catalysts into nanocrystals, and designing supportless catalysts with extended surfaces such as nanostructured thin films, nanotubes, and porous nanostructures. These efforts have produced plenty of excellent electrocatalysts, but the development of multisynergetic functional catalysts exhibiting low cost, high activity, and high durability still faces great challenges. In this Account, we demonstrate that the sol–gel process represents a powerful “bottom-up” strategy for creating nanostructured materials that tackles the problems mentioned above. Aerogels are unique solid materials with ultralow densities, large open pores, and ultimately high inner surface areas. They magnify the specific properties of nanomaterials to the macroscale via self-assembly, which endow them with superior properties. Despite numerous investigations of metal oxide aerogels, the investigation of metal aerogels is in the early stage. Recently, aerogels including Fe, Co, Ni, Sn, and Cu have been obtained by nanosmelting of hybrid polymer–metal oxide aerogels. We report here exclusively on mono-, bi- and multimetallic noble metal aerogels consisting of Ag, Au, Pt, and Pd and their application as electrocatalysts.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.title
Noble Metal Aerogels-Synthesis, Characterization, and Application as Electrocatalysts
en_US
dc.type
Journal Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2015-01-22
ethz.journal.title
Accounts of Chemical Research
ethz.journal.volume
48
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Acc. Chem. Res.
ethz.pages.start
154
en_US
ethz.pages.end
162
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02543 - Inst. f. Molekulare Physikalische Wiss. / Institute of Molecular Physical Science::03910 - Schmidt, Thomas J. / Schmidt, Thomas J.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02543 - Inst. f. Molekulare Physikalische Wiss. / Institute of Molecular Physical Science::03910 - Schmidt, Thomas J. / Schmidt, Thomas J.
ethz.date.deposited
2017-06-11T16:54:28Z
ethz.source
ECIT
ethz.identifier.importid
imp59365313bd29165353
ethz.ecitpid
pub:156278
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T11:53:49Z
ethz.rosetta.lastUpdated
2024-02-02T17:54:38Z
ethz.rosetta.versionExported
true
ethz.COinS
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