Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 847, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.113194
Keywords
Nickel foam; SEM/EDX; OER; Electrochemical impedance spectroscopy
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Funding
- University of Warmia and Mazury in Olsztyn [20.610.001-300]
- program Interdisciplinary Doctoral Studies in Bioeconomy - European Social Fund [POWR.03.02.00-00-1034/16-00]
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This article reports on oxygen evolution reaction (OER), studied in 0.1 M NaOH solution on as received, electrooxidized and Pt-activated (via spontaneous deposition of very small amount: ca. 0.2 wt% of platinum element) nickel foam catalyst materials. The OER characteristics were comparatively evaluated through a.c. impedance spectroscopy, cyclic voltammetry and Tafel polarization experiments, also in function of electrolyte temperature. Morphology of Ni foam materials and the presence of Pt catalytic additives were spectroscopically evaluated through the combined SEM/EDX (Scanning Electron Microscopy/Energy Dispersive X-Ray Spectroscopy) analysis. The results could be beneficial with respect to defining an electrochemical operating window for baseline and platinum-modified nickel foam materials, processed under alkaline environment.
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