Spiky Nickel Electrodes for Electrochemical Oxygen Evolution Catalysis by Femtosecond Laser Structuring

Table 2

Overview of key indications: double layer capacitance and the corresponding roughness factor as well as the oxygen evolution overpotential @ 10 mA cm⁻² of the tempered Ni electrode and the laser-structured samples Ni CLPs 0° and Ni CLPs 45°as prepared and activated.

Sample name			10 mA cm^−2  as prepared	10 mA cm^−2  activated
Ni tempered	0.02 mF cm^−2	1	0.387 V	0.371 V
Ni CLPs 0°	0.97 mF cm^−2	49	0.328 V	0.204 V
Ni CLPs 45°	1.74 mF cm^−2	87	0.289 V	0.226 V