An ordered structured cathode based on vertically aligned Pt nanotubes for ultra-low Pt loading passive direct methanol fuel cells
MetadataShow full item record
© 2017 Ordered nanostructured cathodes based on controlled vertically aligned Pt nanotubes are fabricated via combining sacrificial template method and in-situ galvanic replacement for ultra-low Pt loading passive direct methanol fuel cells (DMFCs). The Pt nanotubes are composed of highly dispersed Pt nanoparticles shell with an average thickness of ca. 15 nm. Employed as the oxygen reduction reaction (ORR) electrocatalyst, it exhibits similar activity but better durability than that of the commercial Pt black. Serving as the cathode for passive DMFC, a high electrochemical specific area of 77.48 m 2 g -1 (Pt) is obtained by the ordered nanostructured cathode, which is 3 times higher than that of the conventional Pt/C based cathode (19.46 m 2 g -1 (Pt) ), indicating a significant improvement in the Pt catalyst utilization. Impressively, the Pt loading at the cathode side can be reduced to approximately 1/7 (0.12 mgcm -2 ) of the conventional MEA without sacrificing cell performance by using the vertically aligned Pt nanotubes catalytic layer. This method may provide a new way to fabricate ordered nanostructured cathode for ultra-low Pt loadings fuel cells.
Showing items related by title, author, creator and subject.
Electrochemical method for synthesis of a ZnFe <inf>2</inf>O <inf>4</inf>/TiO <inf>2</inf> composite nanotube array modified electrode with enhanced photoelectrochemical activityHou, Y.; Li, Xin Yong; Zhao, Q.; Quan, X.; Chen, G. (2010)An electrode with intimate and well-aligned ZnFe 2O 4/TiO 2 composite nanotube arrays is prepared via electrochemical anodization of pure titanium foil in fluorine-containing ethylene glycol, followed by a novel cathodic ...
Bielicka, Agnieszka; Wisniewski, Marek; Terzyk, Artur; Gauden, Piotr; Furmaniak, Sylwester; Roszek, Katarzyna; Kowalczyk, Piotr; Bieniek, A (2013)The application of commercially available carbon materials (nanotubes and porous carbons) for the preparation of drug delivery systems is studied. We used two types of carbon nanotubes (CNT) and two activated carbons as ...
Enhanced oxygen reduction at Pd catalytic nanoparticles dispersed onto heteropolytungstate-assembled poly(diallyldimethylammonium)-functionalized carbon nanotubesWang, D.; Lu, S.; Kulesza, P.; Chang, M.L.; De Marco, Roland; Jiang, San Ping (2011)Both Keggin-type phosphotungstic acid (HPW) and Pd are not prominent catalysts towards the oxygen reduction (ORR), but their composite Pd-HPW catalyst produces a significantly higher electrochemical activity for the ORR ...