Lee, Jae Kwang Choi, Jinsub Kang, Sung Jin Lee, Jong Min Tak, Yongsug Lee, Jaeyoung 2024-01-21T01:34:30Z 2024-01-21T01:34:30Z 2021-09-04 2007-01-20 0013-4686 https://pubs.kist.re.kr/handle/201004/134729 To determine whether a copper oxide modified Pt cathode (PtCuOm) improves a performance of direct methanol fuel cells (DMFC), we performed structural and morphological analysis of the cathode and measured current-potential profile and impedance spectroscopy. Comparing with an unmodified Pt cathode, we found that PtCuOm prepared by rf sputtering techniques induced higher oxygen reduction reaction rate and suppressed electrocatalytic oxidation of methanol, which is the main reason of the mixed potential occurred at a cathode. Therefore, PtCuOm increased the power performance of DMFC applying both oxygen and air and electrochemical impedance spectra clearly supported the difference of the performance between unmodified and modified Pt electrodes. These results may play a role in better long-term stability of DMFC systems. (c) 2006 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD OXYGEN REDUCTION REACTION CATALYSTS CROSSOVER O-2 ELECTROCATALYSTS ELECTROREDUCTION PERFORMANCE ALLOYS CARBON Influence of copper oxide modification of a platinum cathode on the activity of direct methanol fuel cell Article 10.1016/j.electacta.2006.05.064 1 ELECTROCHIMICA ACTA, v.52, no.6, pp.2272 - 2276 ELECTROCHIMICA ACTA 52 6 2272 2276 scie scopus 000244023700008 2-s2.0-33846044143 Electrochemistry Electrochemistry Article; Proceedings Paper OXYGEN REDUCTION REACTION CATALYSTS CROSSOVER O-2 ELECTROCATALYSTS ELECTROREDUCTION PERFORMANCE ALLOYS CARBON copper oxide DMFC oxygen reduction reaction methanol tolerant cathode