화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.16, No.5, 688-697, September, 2010
DOI10.1016/j.jiec.2010.07.017  Export Citation
Electrocatalytic characteristics of Pt-Ru-Co and Pt-Ru-Ni based on covalently cross-linked sulfonated poly(ether ether ketone)/heteropolyacids composite membranes for water electrolysis
Je-Young Woo, Kwang-Mun Lee, Bong-Chul Jee, Cheol-Hwi Ryu, Cheol-Hun Yoon, Jang-Hoon Chung1, Yong-Ryul Kim2, Sang-Bong Moon3, and An-Soo Kang†
  • Department of Chemical Engineering, Myongji University, San 38-2 Nam-dong, Cheoin-gu, Yongin, Gyeonggi-do 449-728, Republic of Korea
  • 1Department of Chemistry, Myongji University, San 38-2 Nam-dong, Cheoin-gu, Yongin, Gyeonggi-do 449-728, Republic of Korea
  • 2Department of Chemical Engineering, Daejin University, Phochon, Gyeonggi-do 487-711, Republic of Korea
  • 3Elchem Tech Co., Ltd., New T Castle 1001, 429-1 Gasan-dong, Geumchun-gu, Seoul 153-803, Republic of Korea
E-mail:
Membrane electrode assemblies (MEAs) of covalently cross-linked sulfonated poly(ether ether ketone) (CL-SPEEK)/heteropolyacids (HPAs) composite polymer with platinum-based alloys such as Pt-Ru-Co and Pt-Ru-Ni were prepared and their electrochemical properties for water electrolysis were investigated. The HPAs, which were used in the composite membranes, were tungstophosphoric acid (TPA) (the part of TPA data was permitted by the previous authors), molybdophosphoric acid (MoPA), and tungstosilicic acid (TSiA). The MEAs with Pt-Co, Pt-Ru-Co, and Pt-Ru-Ni in the anode catalyst layer were prepared by means of a non-equilibrium impregnation.reduction (I-R) method. The electrocatalytic properties of composite membranes, such as the cell voltage and coulombic charge in CV, were in the following order: CL-SPEEK/MoPA40 > CL-SPEEK/TPA30 > CL-SPEEK/TSiA40 (wt%). For the optimum cell applications of water electrolysis, the cell voltage of Pt/PEM/Pt-Ru-Co (Electrodeposited (Dep)-MoPA) MEA with a CL-SPEEK/MoPA40 membrane was 1.70 V at 80 ℃ and 1 A cm^(-2), and this voltage carried a value lower than that of 1.81 V of Nafion 117. In addition, the observed activity of Pt-Ru-Co (75:12:13 by EDX) is a little higher than that of Pt-Ru-Ni (79:10:11 by EDX). The mean coulombic charge and activity enhancement of Pt-Ru-Co catalysts, with and without electrodeposition, showed the same CV profiles of the Pt-Ru-Co catalysts and were in the following order: Nafion 117 < CL-SPEEK/TSiA40 < CL-SPEEK/TPA30 < CL-SPEEK/MoPA40. The current density peak of electrodeposited electrodes was a little better than those of inactivated electrodes on the same membranes. The current peak by Pt-Ru-Co with CL-SPEEK/MoPA40 (Dep-MoPA) is more than about three times as high as those of Pt electrodes on the same membranes.
Keywords:Electrocatalytic heteropolyacid;Pt-Ru-Co and Pt-Ru-Ni catalysts;Electrodeposition;Covalently cross-linked sulfonated;poly(ether ether ketone) (CL-SPEEK);Cell voltage
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