Self-supporting hierarchical porous PtAg alloy nanotubular aerogels as highly active and durable electrocatalysts
Liu W, Haubold D, Rutkowski B, Oschatz M, Huebner R, Werheid M, Ziegler C, Sonntag L, Liu S, Zheng Z, Herrmann AK, Geiger D, Terlan B, Gemming T, Borchardt L, Kaskel S, Czyrska-Filemonowicz A, Eychmueller A (2016)
Publication Type: Journal article
Publication year: 2016
Journal
Book Volume: 28
Pages Range: 6477-6483
Journal Issue: 18
DOI: 10.1021/acs.chemmater.6b01394
Abstract
Developing electrocatalysts with low cost, high activity, and good durability is urgently demanded for the wide commercialization of fuel cells. By taking advantage of nanostructure engineering, we fabricated PtAg nanotubular aerogels (NTAGs) with high electrocatalytic activity and good durability via a simple galvanic replacement reaction between the in situ spontaneously gelated Ag hydrogel and the Pt precursor. The PtAg NTAGs have hierarchical porous network features with primary networks and pores from the interconnected nanotubes of the aerogel and secondary networks and pores from the interconnected thin nanowires on the nanotube surface, and they show very high porosities and large specific surface areas. Due to the unique structure, the PtAg NTAGs exhibit greatly enhanced electrocatalytic activity toward formic acid oxidation, reaching 19 times higher metal-based mass current density as compared to the commercial Pt black. Furthermore, the PtAg NTAGs show outstanding structural stability and electrochemical durability during the electrocatalysis. Noble metal-based NTAGs are promising candidates for applications in electrocatalysis not only for fuel cells, but also for other energy-related systems.
Involved external institutions
Technische Universität Dresden
Germany (DE)
University of Science and Technology (AGH) / Akademia Górniczo-Hutnicza
Poland (PL)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Universität Ulm
Germany (DE)
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden
Germany (DE)
Germany (DE)
University of Science and Technology (AGH) / Akademia Górniczo-Hutnicza
Poland (PL)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Universität Ulm
Germany (DE)
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden
Germany (DE)
How to cite
APA:
Liu, W., Haubold, D., Rutkowski, B., Oschatz, M., Huebner, R., Werheid, M.,... Eychmueller, A. (2016). Self-supporting hierarchical porous PtAg alloy nanotubular aerogels as highly active and durable electrocatalysts. Chemistry of Materials, 28(18), 6477-6483. https://doi.org/10.1021/acs.chemmater.6b01394
MLA:
Liu, Wei, et al. "Self-supporting hierarchical porous PtAg alloy nanotubular aerogels as highly active and durable electrocatalysts." Chemistry of Materials 28.18 (2016): 6477-6483.
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