Au nanoparticles self-assembled onto Nafion membranes for use as methanol-blocking barriers
Au nanoparticles self-assembled onto Nafion membranes for use as methanol-blocking barriers
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DOI：
10.1016/j.elecom.2005.08.019
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发表时间：
2005-11
影响因子：
5.4
通讯作者：
Shichun Mu;Haolin Tang;Z. Wan;M. Pan;R. Yuan
中科院分区：
文献类型：
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作者：
Shichun Mu;Haolin Tang;Z. Wan;M. Pan;R. Yuan
在乙醇/水中回流四氯金酸三水溶液和保护性阳离子试剂PDDA，制备了荷电Au纳米粒子。Au纳米粒子的Zeta电位为32 mV，尺寸约为4 nm。荷电的Au纳米粒子以甲醇为阻挡层自组装到NafionPEM212膜表面，在甲醇浓度为2mol/L、温度为60℃的条件下，膜的甲醇渗透率从168 mA/cm2降至18 mA/cm2。所有自组装的™都具有比Nafion212膜更高的OCV和更高的性能。自组装24小时的膜具有最高的性能，这是由于甲醇渗透电流密度和可接受的膜面积电阻降低所致。
Charged Au nanoparticles were prepared by refluxing a solution of hydrogen tetrachloroaurate trihydrate and protective cationic agents, PDDA, in ethanol/water. The Au nanoparticle showed zeta potential of 32mV and size of about 4nm. The charged Au nanparticles were self-assembled onto the Nafion™ 212 membrane surface as methanol barriers and the methanol crossover decreases from 168 to 18mA/cm2at the condition of 2mol/L methanol, 60°C. All the self-assembled PEMs have higher OCV and performance than original Nafion 212 membrane. And the PEMs self-assembled for 24h have the highest performance due to the decrease of the methanol permeation current density and acceptable membrane area resistance.