کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1654794 | 1007704 | 2005 | 5 صفحه PDF | دانلود رایگان |
Positive-ion charged Pd nanoparticles were synthesized and anchored to –SO3− clusters on Nafion™ membrane surface by means of selective force between –SO3− clusters and charged particles, namely, electrostatic self-assembly of the membrane. The Pd loading of self-assembled membrane was about 1.73 μg/cm2. 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.
Journal: Materials Letters - Volume 59, Issue 28, December 2005, Pages 3766–3770