Field emission scanning electron microscopy (FE-SEM) images
were obtained on a JEOL Model JSM6335F equipment working at
5 kV. The aluminum mount stubs used for the FE-SEM analysis
were obtained from Electron Microscopy Sciences (Hatfield, UK).
Direct determination of oxygen was carried out with a Flash
1112 analyzer from Thermo Fisher Scientific.
All electrochemical measurements were performed, at room
temperature, on an USB-based portable electrochemical station
m-Stat 100 potentiostat controlled by PSLite 1.6 software and on a
carbon screen-printed electrode (CSPE), which integrates the
three-electrode system, a carbon working electrode of 4mm
diameter as well as a carbon counter and silver (Ag) pseudoreference
electrodes (Dropsens, Oviedo, Spain).
Field emission scanning electron microscopy (FE-SEM) imageswere obtained on a JEOL Model JSM6335F equipment working at5 kV. The aluminum mount stubs used for the FE-SEM analysiswere obtained from Electron Microscopy Sciences (Hatfield, UK).Direct determination of oxygen was carried out with a Flash1112 analyzer from Thermo Fisher Scientific.All electrochemical measurements were performed, at roomtemperature, on an USB-based portable electrochemical stationm-Stat 100 potentiostat controlled by PSLite 1.6 software and on acarbon screen-printed electrode (CSPE), which integrates thethree-electrode system, a carbon working electrode of 4mmdiameter as well as a carbon counter and silver (Ag) pseudoreferenceelectrodes (Dropsens, Oviedo, Spain).
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