Palladium Nanotubes Formed by Lipid Tubule Templating and Their Application in Ethanol Electrocatalysis

Abstract

Palladium nanotubes were fabricated by using lipid tubules as templates for the first time in a controlled manner. The positively charged lipid 1,2-dioleoyl-3-trimethylammoniumpropane (DOTAP) was doped into lipid tubules to adsorb PdCl4 (2-) on the tubule surfaces for further reduction. The lipid tubule formation was optimized by studying the growing dynamics and ethanol/water ratio. The DOTAP-doped tubules showed pH stability from 0 to 14, which makes them ideal templates for metal plating. The Pd nanotubes are open-ended with a tunable wall thickness. They exhibited good electrocatalytic performance in ethanol. Their electrochemically active surface areas were 6.5, 10.6, and 83.2 m(2) g(-1) for Pd nanotubes with 77, 101, and 150 nm wall thickness, respectively. These Pd nanotubes have great potential in fuel cells. The method demonstrated also opens up a way to synthesize hollow metal nanotubes.

Engineering Ordered and Nonordered Porous Noble Metal Nanostructures: Synthesis, Assembly, and Their Applications in Electrochemistry

“…338,339 Very recently, Han's group successfully illustrated the creation of Pd nanotubes using lipid tubules as soft templates. 340 As shown in Figure 28, 1,2-dioleoyl-3-trimethylammoniumpropane (DOTAP)-doped 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (DC 8,9 PC) tubules were first prepared, which endowed the positive charges to adsorb Pd precursors. The resulting DOTAP-doped tubules exhibited significant stability in wide pH range at optimized synthetic conditions.…”

Metal Bromide Controlled Interfacial Aromatization Reaction for Shape‐Selective Synthesis of Palladium Nanostructures with Efficient Catalytic Performances

“…[42] In that regard, palladium nanostructures are anticipated to meet the expectations well . Direct ethanol fuel cells (DEFCs) are advantageous in terms of high energy density, lower toxicity, easy availability and transportation of ethanol, and also the low operational temperature compared with the rest of the fuels . Here, it is worth noting that Pd catalysts show superior electrocatalytic performances with outstanding stability towards the ethanol oxidation reaction (EOR) under alkaline conditions in comparison to common Pt catalysts .…”

Point‐to‐Plane Nonhomogeneous Electric‐Field‐Induced Simultaneous Formation of Giant Unilamellar Vesicles (GUVs) and Lipid Tubes

“…Meanwhile, a variety of methodologies have been developed to generate the lipid tubes, including self‐assembly of lipid molecules and deformation of lipid aggregates undergoing a certain field ,. Molecular self‐assembly is a simple and powerful technique for lipid‐tube formation, but it is limited to particular lipids, such as1,2‐bis(10,12‐tricosadiynoyl)‐sn‐glycero‐3‐phosphocholine (DC8,9PC). Molecular self‐assembly induced by an external field, including hydrodynamic flow,, electric fields, etc., has been used to generate lipid tubes as well.…”