Self-Supporting Hierarchical Porous PtAg Alloy Nanotubular Aerogels as Highly Active and Durable Electrocatalysts | Zendy

Wei Liu | Zendy; Danny Haubold | Zendy; Bogdan Rutkowski | Zendy; Martin Oschatz | Zendy; René Hübner | Zendy; Matthias Werheid | Zendy; Christoph Ziegler | Zendy; Luisa Sonntag | Zendy; Shaohua Liu | Zendy; Zhikun Zheng | Zendy; AnneKristin Herrmann | Zendy; Dorin Geiger | Zendy; Bürgehan Terlan | Zendy; Thomas Gemming | Zendy; Lars Borchardt | Zendy; Stefan Kaskel | Zendy; A. CzyrskaFilemonowicz | Zendy; Alexander Eychmüller | Zendy

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Self-Supporting Hierarchical Porous PtAg Alloy Nanotubular Aerogels as Highly Active and Durable Electrocatalysts

Author(s) -

Wei Liu,

Danny Haubold,

Bogdan Rutkowski,

Martin Oschatz,

René Hübner,

Matthias Werheid,

Christoph Ziegler,

Luisa Sonntag,

Shaohua Liu,

Zhikun Zheng,

AnneKristin Herrmann,

Dorin Geiger,

Bürgehan Terlan,

Thomas Gemming,

Lars Borchardt,

Stefan Kaskel,

A. CzyrskaFilemonowicz,

Alexander Eychmüller

Publication year - 2016

Publication title -

chemistry of materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.741

H-Index - 375

eISSN - 1520-5002

pISSN - 0897-4756

DOI - 10.1021/acs.chemmater.6b01394

Subject(s) - electrocatalyst , aerogel , materials science , nanowire , catalysis , nanotechnology , electrochemistry , porosity , durability , nanostructure , fuel cells , chemical engineering , composite material , electrode , chemistry , organic chemistry , engineering

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 elect...

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