A simple preparation of very high methanol tolerant cathode electrocatalyst for direct methanol fuel cell based on polymer-coated carbon nanotube/platinum

Zehui Yang, Naotoshi Nakashima

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The development of a durable and methanol tolerant electrocatalyst with a high oxygen reduction reaction activity is highly important for the cathode side of direct methanol fuel cells. Here, we describe a simple and novel methodology to fabricate a practically applicable electrocatalyst with a high methanol tolerance based on poly[2,2′-(2,6-pyridine)-5,5′-bibenzimidazole]-wrapped multi-walled carbon nanotubes, on which Pt nanoparticles have been deposited, then coated with poly(vinylphosphonic acid) (PVPA). The polymer coated electrocatalyst showed an ∼3.3 times higher oxygen reduction reaction activity compared to that of the commercial CB/Pt and methanol tolerance in the presence of methanol to the electrolyte due to a 50% decreased methanol adsorption on the Pt after coating with the PVPA. Meanwhile, the peroxide generation of the PVPA coated electrocatalyst was as low as 0.8% with 2 M methanol added to the electrolyte, which was much lower than those of the non-PVPA-coated electrocatalyst (7.5%) and conventional CB/Pt (20.5%). Such a high methanol tolerance is very important for the design of a direct methanol fuel cell cathode electrocatalyst with a high performance.

Original languageEnglish
Article number12236
JournalScientific reports
Volume5
DOIs
Publication statusPublished - Jul 20 2015

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Carbon Nanotubes
Direct methanol fuel cells (DMFC)
Electrocatalysts
Platinum
Methanol
Polymers
Cathodes
Electrolytes
Oxygen
Peroxides
Nanoparticles
Adsorption
Coatings
poly(vinylphosphonic acid)

All Science Journal Classification (ASJC) codes

  • General

Cite this

A simple preparation of very high methanol tolerant cathode electrocatalyst for direct methanol fuel cell based on polymer-coated carbon nanotube/platinum. / Yang, Zehui; Nakashima, Naotoshi.

In: Scientific reports, Vol. 5, 12236, 20.07.2015.

Research output: Contribution to journalArticle

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