Localized Electrochemical Impedance Measurements on Nafion Membranes: Observation and Analysis of Spatially Diverse Proton Transport Using Atomic Force Microscopy
文献类型：期刊论文
| 作者 | Wang, Xiaojiang2,3; Habte, Bereket T.4,5; Zhang, Shuomeng2,3; Yang, Houhua1; Zhao, Jing6; Jiang, Fangming4 ; He, Qinggang2,3
|
| 刊名 | ANALYTICAL CHEMISTRY
 |
| 出版日期 | 2019-09-17 |
| 卷号 | 91期号:18页码:11678-11686 |
| ISSN号 | 0003-2700 |
| DOI | 10.1021/acs.analchem.9b02218 |
| 通讯作者 | Jiang, Fangming(jiangfm@ms.giec.ac.cn) ; He, Qinggang(qghe@zju.edu.cn) |
| 英文摘要 | The distribution of ion conductive channels on the Nafion membrane surface, which determines the formation of the three-phase boundary, plays a very important role in improving the performance of proton-exchange membrane fuel cells. Therefore, understanding the microstructures at the catalyst layer/membrane interfaces of proton-exchange membranes is essential. Although current-sensing atomic force microscopy (AFM) can present some surface conductance data, localized impedance measurement providing more accurate proton-transport information is desirable. To obtain this information, in our study, localized electrochemical impedance spectroscopy was measured automatically with a home-built AFM-electrochemical impedance spectroscopy setup in which AFM was coupled with an impedance tester by a customized procedure. By this method, the localized proton-transport resistance at different humidities was observed in spatially diverse locations, and the value decreased as the membrane became hydrated. Furthermore, the microstructure of the Nafion membrane was numerically reconstructed at different hydration levels to examine the relationship between the membrane microstructural morphology and proton-transport resistance. The results showed that the spatial diversity of proton-transport resistance arose from the variable concentration of hydrophilic groups at the contact location of the AFM tip and the membrane, and from the heterogeneity of dry sulfonic acid groups in the membrane that creates local variation in water content. |
| WOS关键词 | EXCHANGE MEMBRANES ; PHASE-SEPARATION ; SURFACE ; CONDUCTIVITY ; IONOMER ; MORPHOLOGY ; HYDROGEN ; VAPOR ; AFM |
| 资助项目 | National Natural Science Foundation of China[21676241] ; National Natural Science Foundation of China[U1732111] ; The Recruitment Program of Global Youth Experts from the Chinese government ; Hundred Talents Program of Zhejiang University ; Guangdong Science and Technology Department[2016A030313172] ; Guangzhou Scientific and Technological Development Plan[201804020020] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000487156900028 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Natural Science Foundation of China ; The Recruitment Program of Global Youth Experts from the Chinese government ; Hundred Talents Program of Zhejiang University ; Guangdong Science and Technology Department ; Guangzhou Scientific and Technological Development Plan |
| 源URL | [http://ir.giec.ac.cn/handle/344007/25661]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Jiang, Fangming; He, Qinggang |
| 作者单位 | 1.Metrohm China Ltd, Shanghai 200050, Peoples R China 2.Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Zhejiang, Peoples R China 3.Inst Zhejiang Univ Quzhou, 78 Jiuhua Blvd North, Quzhou 324000, Zhejiang, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Lab Adv Energy Syst, Guangzhou 510640, Guangdong, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Keysight Technol, Nanotechnol Measurement Div, Shanghai 200080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiaojiang,Habte, Bereket T.,Zhang, Shuomeng,et al. Localized Electrochemical Impedance Measurements on Nafion Membranes: Observation and Analysis of Spatially Diverse Proton Transport Using Atomic Force Microscopy[J]. ANALYTICAL CHEMISTRY,2019,91(18):11678-11686. |
| APA | Wang, Xiaojiang.,Habte, Bereket T..,Zhang, Shuomeng.,Yang, Houhua.,Zhao, Jing.,...&He, Qinggang.(2019).Localized Electrochemical Impedance Measurements on Nafion Membranes: Observation and Analysis of Spatially Diverse Proton Transport Using Atomic Force Microscopy.ANALYTICAL CHEMISTRY,91(18),11678-11686. |
| MLA | Wang, Xiaojiang,et al."Localized Electrochemical Impedance Measurements on Nafion Membranes: Observation and Analysis of Spatially Diverse Proton Transport Using Atomic Force Microscopy".ANALYTICAL CHEMISTRY 91.18(2019):11678-11686. |
入库方式： OAI收割
来源：广州能源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。