Journal
JOURNAL OF POWER SOURCES
Volume 364, Issue -, Pages 392-399Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2017.08.019
Keywords
Carbon nanotubes; Chemical reduction; Catalyst; Platinum nanoparticles; Direct methanol fuel cell
Funding
- Department of Science and Technology (DST) INSPIRE Faculty grant [IFA 12-PH 33]
- DST-INSPIRE Fellowship grant [IF150016]
- DST-SERB grant, Government of India [SR/FTP/PS-045/2012]
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A strategy for tuning the surface property of Single Walled Carbon Nanotubes (SWNTs) for enhanced methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) along with methanol tolerance is presented. The surface functionality is tailored using controlled acid and base treatment. Acid treatment leads to the attachment of carboxylic carbon (CC) fragments to SWNT making it hydrophilic (P3-SWNT). Base treatment of P3-SWNT with 0.05 M NaOH reduces the CCs and makes it hydrophobic (P33-SWNT). Pt catalyst supported on the P3-SWNT possesses enhanced MOR whereas that supported on P33-SWNT not only enhances ORR kinetics but also possess good tolerance towards methanol oxidation as verified by the electrochemical technique. (C) 2017 Elsevier B.V. All rights reserved.
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