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Nafion

About: Nafion is a research topic. Over the lifetime, 9110 publications have been published within this topic receiving 320865 citations.


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Journal ArticleDOI
TL;DR: In this paper, the morphology of the proton-conducting membrane was modified by using plasma etching and palladium-sputtering on a Nafion™ polymer membrane.

235 citations

Journal ArticleDOI
TL;DR: In this article, a four-electron mechanism appears to be the main pathway, with particle size and carbon substrate effects on the H2O2 production on platinum particles supported on carbon inside a proton exchange membrane (Nafion®).
Abstract: Dihydrogen peroxide production on platinum particles supported on carbon inside a proton exchange membrane (Nafion®), that is, under the working conditions of PEMFC cathodes, is rather small at the usual oxygen reduction potentials. As on bulk platinum, a four-electron mechanism appears to be the main pathway, with particle size and carbon substrate effects on the H2O2 production. A large increase in the H2O2 contribution takes place at low potentials, that is, at the working potentials of PEMFC anodes.

235 citations

Journal ArticleDOI
TL;DR: In this paper, a triblock copolymer ionomer, sulfonated poly(styrene-isobutylene-styrene) (S-SIBS), was investigated for its application to the direct methanol fuel cell (DMFC).

234 citations

Journal ArticleDOI
TL;DR: In this paper, perfluorosulfonate acid (PFOA) membranes were doped with cesium ions to several degrees, and they were investigated in relation to methanol permeability as well as hydrogen ion conductivity.
Abstract: Poly(perfluorosulfonate acid) membranes were doped with cesium ions to several degrees. These, along with the H{sup +}-form membrane, were investigated in relation to methanol permeability as well as hydrogen ion conductivity. While retaining considerable conductivity, the cesium-doped membranes are highly impermeable to methanol. The author found that methanol permeability in the membrane reduced by over one order of magnitude, owing to the presence of cesium ions. These findings are discussed on the basis of alterations produced by cesium in the membrane microstructure. Also discussed is the potential implication of these results in the direct methanol fuel cell technology.

234 citations

Journal ArticleDOI
TL;DR: The feasibility of using nonvolatile molten and solid acidic electrolyte impregnated ion exchange membranes in higher temperature proton-exchange membrane fuel cells (PEMFCs) to alleviate their water dependence is investigated in this paper.
Abstract: The feasibility of using nonvolatile molten and solid acidic electrolyte impregnated ion-exchange membranes in higher temperature proton-exchange membrane fuel cells (PEMFCs) to alleviate their water dependence is investigated. Higher temperature PEMFC operation reduces CO poisoning as well as passivation of the Pt electrocatalyst by other condensable species. Further, higher temperature operation could eventually allow direct use of low-temperature reformable fuels such as methanol in the PEMFC. The methodology proposed here involves supporting an appropriate acidic solid, melt, or solution of low volatility within the pores of Nafion{reg_sign} so as to enhance its protonic conductivity at higher temperatures and lower humidity levels. Preliminary experimental results reported here for a PEM fuel cell operating at temperatures of 110 to 120 C based on Nafion supported solutions of heteropolyacid indicate the feasibility of the technique.

233 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023253
2022503
2021338
2020367
2019386
2018393