电极
电解质
材料科学
X射线光电子能谱
分析化学(期刊)
离子液体
可逆氢电极
工作电极
钯氢电极
扫描电子显微镜
透射电子显微镜
参比电极
化学工程
化学
纳米技术
催化作用
复合材料
色谱法
生物化学
工程类
物理化学
作者
E. Jayanthi,N. Murugesan,A. S. Suneesh,C. Ramesh,S. Anthonysamy
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2017-01-01
卷期号:164 (8): H5210-H5217
被引量:18
摘要
A fuel cell based amperometric room temperature hydrogen sensor with Nafion as proton conducting electrolyte, Pd as sensing electrode, Pt as both counter and reference electrodes has been developed. Sensing electrode was prepared by electrodeposition of Pd on carbon gas diffusion electrode using room temperature ionic liquid electrolyte. Pt spray coated on gas diffusion electrode forms the counter electrode in the sensor. Pd electrodeposition was carried out at an applied potential of −1.0 V vs Pd wire and resulted in the formation of Pd clusters. The microstructure of electrodeposited Pd was investigated using field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). The crystal structure of the Pd nanoparticles was indexed to face centered cubic by X-ray diffraction (XRD) and selected area electron diffraction (SAED). X-ray photoelectron spectroscopy (XPS) confirmed metallic form of the deposited Pd nanoparticles. The scratch test endorsed the fact that Pd nanoparticles adhered firmly to the surface of the gas diffusion electrode and it is found to be stable up to the load of 2 N. Range of response of the sensor to H2 was in the concentration range 1% to 5% and found to be linear.
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