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Electrochemical Characteristics of Pt/PEM/Pt-Ru MEA for Water Electrolysis  

Kweon, Oh-Hwan (Department of Chemical Engineering, Myongji University)
Kim, Kyung-Eon (Department of Chemical Engineering, Myongji University)
Jang, In-Young (Department of Chemical Engineering, Myongji University)
Hwang, Yong-Koo (Department of Chemical Engineering, Myongji University)
Chung, Jang-Hoon (Department of Chemistry, Myongji University)
Moon, Sang-Bong (Elchem Tech Co., Ltd.)
Kang, An-Soo (Department of Chemical Engineering, Myongji University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.19, no.1, 2008 , pp. 18-25 More about this Journal
Abstract
The membrane electrode assembly(MEA) was prepared by a nonequilibrium impregnation- reduction (I-R) method. Nafion 117 and covalently cross-linked sulfonated polyetherether with tungsto- phosphoric acid (CL-SPEEK/TPA30) prepared by our laboratory, were chosen as polymer electrolyte membrane(PEM). $Pt(NH_3)_4Cl_2$, $RuCl_3$ and reducing agent $(NaBH_4)$ were used as electrocatalytic materials. Electrochemical activity surface area(ESA) and specific surface area(SSA) of Pt cathodic electrode with Nafion 117 were $22.48m^2/g$ and $23.50m^2/g$ respectively under the condition of 0.8 M $NaBH_4$. But Pt electrode prepared by CL-SPEEK/TPA30 membrane exhibited higher ESA $23.46m^2/g$ than that of Nafion 117. In case of Pt-Ru anodic electrode, the higher concentration of Ru was, the lower potential of oxygen reduction and region of hydrogen desorption was, and Pt-Ru electrode using 10 mM $RuCl_3$ showed best properties of SSA $34.09m^2/g$ with Nafion 117. In water electrolysis performance, the cell voltage of Pt/PEM/Pt-Ru MEA with Nafion 117 showed cell property of 1.75 V at $1A/cm^2$ and $80{\circ}C$. On the same condition, the cell voltage with CL-SPEEK/TPA30 was the best of 1.73 V at $1A/cm^2$.
Keywords
PEM electrolysis(PEME); membrane electrode assembly(MEA); nonequilibrium impregnation-reduction method; Pt-Ru anodic electrode; cell voltage;
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Times Cited By KSCI : 1  (Citation Analysis)
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