Modification of Nafion™ membrane to reduce methanol crossover via self-assembled Pd nanoparticles

Autor:	San Ping Jiang, Run Zhang Yuan, Haolin Tang, Mu Pan
Rok vydání:	2005
Předmět:	Materials science Proton Mechanical Engineering Inorganic chemistry Nanoparticle Conductivity Condensed Matter Physics Charged particle Direct methanol fuel cell chemistry.chemical_compound Membrane chemistry Mechanics of Materials General Materials Science Methanol Self-assembly
Zdroj:	Materials Letters. 59:3766-3770
ISSN:	0167-577X
DOI:	10.1016/j.matlet.2005.07.013
Popis:	Positive-ion charged Pd nanoparticles were synthesized and anchored to –SO 3 − clusters on Nafion™ membrane surface by means of selective force between –SO 3 − clusters and charged particles, namely, electrostatic self-assembly of the membrane. The Pd loading of self-assembled membrane was about 1.73 μg/cm 2 . Methanol crossover of the Nafion™ membranes was suppressed after the assembled procedure. The methanol crossover current was reduced by as much as eight orders of magnitude compared to pure Nafion™ membrane while there was no reduction in the proton conductivity of the membrane. Methanol permeating across the resulting Nafion™ membranes was 1.3 × 10 − 15 mol cm − 2 s − 1 , comparing with the value of pure Nafion™ membranes (self-assembled for 0 h) of 1.4 × 10 − 7 mol cm − 2 s − 1 . The results demonstrate the promises of the application of such Pd-PDDA nanoparticle self-assembled Nafion™ membrane in DMFC.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0d76921c42582e731ba1ef0eaf0e30aa https://doi.org/10.1016/j.matlet.2005.07.013 Zobrazit plný text záznamu Full Text from ScienceDirect