Authors: Kai Zhao Qing Xu DuanPing Huang Min Chen BokHee Kim
Publish Date: 2011/08/05
Volume: 18, Issue: 1-2, Pages: 75-83
Abstract
Porous La2NiO4+δ electrodes were prepared from superfine starting powder on dense substrates of Ce08Sm02O19 electrolyte by a spin coating technique The microstructure and electrochemical properties of the electrodes were investigated within the sintering temperature range of 1000–1100 °C An obvious effect of sintering temperature on the microstructure and electrochemical properties was detected The variation of the electrochemical properties with sintering temperature was explained in relation to the microstructural evolution of the porous electrodes It was detected that the electrode processes greatly depended on the microstructure of the electrodes The polarization of surface oxygen exchange process was found to be the major contribution to the total electrode polarization The electrode sintered at 1050 °C showed the optimum electrocatalytic activity among the investigated electrodes At 800 °C the electrode exhibited a polarization resistance of 042 Ω cm2 an overpotential of 48 mV at a current density of 200 mA cm−2 and an exchange current density of 121 mA cm−2This work was supported by the Natural Science Foundation of China 50572079 and A3 Foresight Program50821140308 Ministry of Education 200804971002 and Wuhan Science and Technology Bureau 200851430485 The authors are grateful to the International Collaborative Research Program of Chonbuk National University 2009 for supporting the research
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