Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9684733 | Journal of Membrane Science | 2005 | 7 Pages |
Abstract
A Pd layer was deposited on Nafion® membrane by electroless plating in order to reduce methanol crossover. The composite membrane was characterized by using the following techniques of X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDXS) and transmission electron microscopy (TEM). Methanol crossover was determined by the electrochemical method. The experimental results indicated that Pd film was successfully deposited onto the Nafion® membrane. The methanol permeability was effectively suppressed by the Pd layer, with methanol-related current decreasing from 64Â mA/cm2 (Jlim) to 57Â mA/cm2 for 1Â M methanol and from 267Â mA/cm2 to 170Â mA/cm2 for 5Â M methanol, respectively. Furthermore, by employing the novel Pd-Nafion® composite electrolyte, the performance of single fuel cell was obviously improved with a high concentration of methanol such as 5Â M, indicating that depositing Pd layer onto the Nafion® membrane is an effective method to suppress the methanol crossover.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Hai Sun, Gongquan Sun, Suli Wang, Jianguo Liu, Xinsheng Zhao, Guoxiong Wang, Hengyong Xu, Shoufu Hou, Qin Xin,