Fig. 2. a. Cyclic voltammograms on Co core/Pt partial shell electrocatalysts in 1 M KOH
with no lignin. Room temperature, 0.05 V/s scan rate. b. Cyclic voltammograms on Co
core/Pt partial shell electrocatalysts in 1 M KOH with 10 g lignin per liter. Room
temperature, 0.05 V/s scan rate.