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Highly active N-doped-CNTs grafted on Fe/C prepared by pyrolysis of dicyandiamide on Fe2O3/C for electrochemical oxygen reduction reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
46861 46451 2011 7 PDF Available
Title
Highly active N-doped-CNTs grafted on Fe/C prepared by pyrolysis of dicyandiamide on Fe2O3/C for electrochemical oxygen reduction reaction
Abstract

Non-noble electro-catalysts were synthesized by pyrolyzing dicyandiamide (DCDA) on carbon supported iron oxide at 700 °C, 800 °C and 900 °C. The effects of pyrolysis temperature on electrochemical properties towards oxygen reduction reaction (ORR) were investigated. After pyrolysis, newly generated carbon arising from DCDA was observed in all the catalysts. Especially at 900 °C, carbon nanotubes (CNTs) were grown catalyzed by Fe2O3/C. Pyrolysis of DCDA at higher temperatures increased ORR activity significantly. The catalyst exhibiting the best performance towards ORR was Fe2O3/C pyrolyzed with DCDA at 900 °C. EDX and XPS experiments revealed that nitrogen atoms from DCDA were doped into carbon and the amount of doped nitrogen increased with increasing temperature. The reason for high reactivity towards oxygen reduction reaction is due to nitrogen doped CNTs grown on Vulcan carbon support. The reactivity increased as the amount of doped nitrogen increased.

Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► N-doped CNTs grafted on carbon Vulcan are synthesized. ► The catalyst shows high activity towards electro-oxygen reduction reaction (ORR). ► Increasing pyrolysis temperature assists the doping of nitrogen into carbon. ► ORR activity is proportional to the amount of nitrogen doped.

Keywords
CNT-grafted Carbon; Nitrogen doped carbon; Fuel Cell Cathode; Oxygen reduction reaction
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Highly active N-doped-CNTs grafted on Fe/C prepared by pyrolysis of dicyandiamide on Fe2O3/C for electrochemical oxygen reduction reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 103, Issues 3–4, 5 April 2011, Pages 362–368
Authors
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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