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Activity and stability studies of platinized multi-walled carbon nanotubes as fuel cell electrocatalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
45649 46418 2015 11 PDF Available
Title
Activity and stability studies of platinized multi-walled carbon nanotubes as fuel cell electrocatalysts
Abstract

•We offer evidence of strong interaction between Pt and PCA coated MWCNT.•The electrocatalytic activity is related to pyrenecarboxylic acid content.•Platinum-support interaction provides an extended electrochemical stability.•Proof of carbon nanotube transformation to carbon spheres under potential cycling.

A non-covalent functionalization for multi-walled carbon nanotubes has been used as an alternative to the damaging acid treatment. Platinum nanoparticles with similar particle size distribution have been deposited on the surface modified multi-walled carbon nanotubes. The interaction between platinum nanoparticles and multi-walled carbon nanotubes functionalized with 1-pyrenecarboxylic acid is studied and its electrochemical stability investigated. This study reveals the existence of a platinum-support interaction and leads to three main conclusions. First, the addition of 1-pyrenecarboxylic acid is improving the dispersion of platinum nanoparticles, leading to an improved electrochemical activity towards oxygen reduction reaction. Second, the investigations regarding the electrochemical stability showed that the platinum-support interaction plays an important role in improving the long-term stability by as much as 20%. Third, post-mortem microscopy analysis showed a surprising effect. During the electrochemical stability investigations concerned with carbon corrosion it was found that the multi-walled carbon nanotubes were undergoing severe structural change, transforming finally into carbon spheres.

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Keywords
Oxygen reduction reaction; Platinum nanoparticles; Carbon nanotubes; Electrochemical stability
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Activity and stability studies of platinized multi-walled carbon nanotubes as fuel cell electrocatalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 162, January 2015, Pages 289–299
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us