All measurements were controlled using the potentiostat
Autolab PGSTAT126N and the software Metrohm NOVA 1.8.
A three-electrode setup was used in all experiments: reference
electrode (Ag/AgCl, 3 M KCl; double junction; Metrohm
6.07.29.100) using CH3COOLi as the bridge electrolyte, a counter
electrode (Metrohm platinum rod, 2 mm in diameter), and the
working electrode (200 mm in diameter, see section Electrode
fabrication). Before each experiment, the electrolyte was degassed
with nitrogen gas. During the electrochemical measurements,
the electrolyte solution was flushed with nitrogen gas to prevent
oxygen from dissolving into the electrolyte. All experiments were
performed at room temperature (22 1C 1 1C).