Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells.

Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells. Research Abstract Details 

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Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells. Abstract Text:

Wenjing Zhang,Martin Ka Shing Li,Po-Lock Yue,Ping Gao,

Monolayers of Pt nanoparticles of diameters of 2-3 nm with a high crystallinity were successfully anchored onto exfoliated nanoclay surfaces using a novel chemical vapor deposition process. Chemical bonding of Pt to the oxygen on the clay surface ensured the stability of the Pt nanoparticles, and hence, no leaching of Pt particles was observed after a prolonged ultrasonication and a rigorous mechanical agitation of Pt-clay in the Nafion solution during the membrane casting process. Systematic analysis using WAXD and TEM showed that the recasting process produced a new self-humidifying exfoliated Pt-clay/Nafion nanocomposite membrane with a high crystallinity and proton conductivity. In situ water production for humidification of the dry membranes without any external humidification was characterized by a combined water uptake and FTIR analysis of the as-prepared membrane after a single cell testing without using electrodes. The power density at 0.5 V of a single cell made of a Pt-clay/Nafion nanocomposite membrane was 723 mW/cm2, which is 170% higher than that made of a commercial Nafion 112 membrane of similar thickness. No compromise in mechanical properties was observed.

Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells. Publishing Authors By Initials

W Zhang,MK Li,PL Yue,P Gao,

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Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Langmuir : the ACS journal of surfaces and colloid

VOLUME: 24

Page Numbers: 2663-70

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ISSN: 0743-7463

DAY: 7

MONTH: 02

YEAR: 2008

Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Exfoliated pt-clay/nafion nanocomposite membrane for self-humidifying polymer electrolyte fuel cells.

AFFILIATION: Department of Chemical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People's Republic of China.

Country: United States

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MEDLINETA: Langmuir

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