当前位置: X-MOL 学术Solid State Ionics › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Substrate-dependent proton transport and nanostructural orientation of perfluorosulfonic acid polymer thin films on Pt and carbon substrate
Solid State Ionics ( IF 3.2 ) Pub Date : 2020-09-24 , DOI: 10.1016/j.ssi.2020.115456
Xiao Gao , Kentaro Yamamoto , Tomoyasu Hirai , Noboru Ohta , Tomoki Uchiyama , Toshiki Watanabe , Masakuni Takahashi , Naoki Takao , Hideto Imai , Seiho Sugawara , Kazuhiko Shinohara , Yoshiharu Uchimoto

The electrochemical reactions occur on the carbon-supported platinum covered by a proton conducting polymer electrolyte. Thus, it is important to clarify the correlation between proton conductivity and morphology of the polymer electrolyte on Pt or carbon. In this study, the properties of thin films (50–200 nm) of Nafion®, which is the typical polymer electrolyte, were investigated on platinum and carbon substrates. Grazing-incidence small/wide angle X-ray scattering and electrochemical impedance spectroscopy were used to extract morphological and proton transport information. Self-designed interdigitated array electrodes were utilized to test and compare the proton conductivity on the Pt and carbon substrates. Based on the results, the difference in anisotropic behavior of Nafion thin films on each substrate were explored, which exhibit that the proton conductivity of Pt-supported Nafion thin films has more well defined hydrophilic domain structure than that of carbon supported thin films along in-plane direction and while it showed the opposite trend in the out-of-plane direction. These datasets and analyses represented a thorough study of the behavior of Nafion thin films on model substrates of interest, i.e., Pt catalyst/carbon electrodes. These results are expected to further understanding the difference in term of proton transport pathway.



中文翻译:

铂和碳基质上全氟磺酸聚合物薄膜的基质依赖性质子传输和纳米结构取向

电化学反应发生在质子传导聚合物电解质覆盖的碳载铂上。因此,重要的是要阐明质子电导率与Pt或碳上的聚合物电解质的形态之间的相关性。在这项研究中,研究了典型的聚合物电解质Nafion®的薄膜(50-200 nm)在铂和碳基底上的性能。掠入射小/广角X射线散射和电化学阻抗谱用于提取形态和质子传输信息。利用自行设计的叉指阵列电极来测试和比较Pt和碳衬底上的质子传导率。根据结果​​,研究了Nafion薄膜在每个基板上的各向异性行为的差异,它们显示出Pt负载的Nafion薄膜的质子电导率比碳负载的薄膜在面内方向上具有更好定义的亲水域结构,而在面外方向上呈现相反的趋势。这些数据集和分析代表了对Nafion薄膜在感兴趣的模型基底(即Pt催化剂/碳电极)上的行为的全面研究。这些结果有望进一步了解质子运输途径的不同。这些数据集和分析代表了对Nafion薄膜在感兴趣的模型基底(即Pt催化剂/碳电极)上的行为的全面研究。这些结果有望进一步了解质子运输途径的不同。这些数据集和分析代表了对Nafion薄膜在感兴趣的模型基底(即Pt催化剂/碳电极)上的行为的全面研究。这些结果有望进一步了解质子运输途径的不同。

更新日期:2020-09-24
down
wechat
bug