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Full-Text Articles in Engineering
Study On The Microband Array Electrode_Based Glucose Microsensor, Nengqin Jia, Chuijue Sun, Ling Gao, Zongrang Zhang
Study On The Microband Array Electrode_Based Glucose Microsensor, Nengqin Jia, Chuijue Sun, Ling Gao, Zongrang Zhang
Journal of Electrochemistry
The microband array electrode(MAE) consisting of 11 Pt microband of 5 m in wide, 2000 m long and 85 m gap was fabricated with a thin film techology .The MAE was characterized by means of cyclic voltammetry in a solution of K3Fe(CN)6 and H2O2. The results showed higher current density on MAE than on conventional Pt eletrode due to the strong edge effect of the former. A glucose microsensor was constructed with the substrate electrode of microband array. Microband array electrode was modified by Nafion followed by the immobilization of ferrocene onto Nafion layer as the electron transfer mediator,finally a …
Influence Of Ptfe And Nafion On The Utilizationefficiency Of Pt/C Catalyst In Pemfc, Xiaoliang Cheng, Baolian Yi, Jingxin Zhang, Ming Han, Yaguang Qiao
Influence Of Ptfe And Nafion On The Utilizationefficiency Of Pt/C Catalyst In Pemfc, Xiaoliang Cheng, Baolian Yi, Jingxin Zhang, Ming Han, Yaguang Qiao
Journal of Electrochemistry
With cycling voltammetry curve(C-V), TEM and SEM photographs, the influence of PTFE and Nafion on the platinum utilization in catalyst layer of PEMFC was investigated. The results show that in gas diffusion electrode, the blocking effect of PTFE in the platinum utilization is not pronunced. In the thin_film catalyst layer, the electron conduct of the catalyst was blocked by the nafion solid and this caused the decrease of platinum utilization. With the increase of the nafion content in the catalyst layer, both platinum utilization and the electron conductivity decreased in the catalyst layer. Because the molecule size of nafion is …