期刊
ELECTROCHIMICA ACTA
卷 321, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.134657
关键词
Carbon materials; Oxygen evolution reaction (OER); Rotating ring-disk electrode (RRDE); Carbon corrosion; Lifetime
资金
- National Centre for Scientific Research (France)
- Russian Foundation for Basic Research (Russia) [16-53-76014, 270]
- French Embassy in Russia
Carbon materials are widely applied as conductive additives in studies of the oxygen evolution reaction (OER) in alkaline media catalyzed by transition metal oxides. In this work we investigate the anodic behavior of three representative carbon materials: furnace black (Vulcan XC-72R), acetylene black, and pyrolytic carbon of the Sibunit family (Sibunit-152), in 1 M NaOH at high potentials (ranging from the OER onset and up to ca. 2 V vs. RHE) in the time span from several minutes to several hours. We apply the rotating ring-disk electrode (RRDE) to separate the OER current from the carbon corrosion current. We then use transmission electron microscopy (TEM) to visualize changes in the carbon morphology resulting from corrosion. Finally, we study the OER performance of composite electrodes comprising carbon materials mixed with a La0.5Sr0.5Mn0.5Co0.5O3-delta perovskite OER catalyst, and discuss possible influence of the oxide on the carbon corrosion. (C) 2019 Elsevier Ltd. All rights reserved.
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