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

Figure 2

Normalized Ni 2p_3/2 X-ray photoelectron spectrum (a) and the corresponding O 1s spectrum (b) of NiO powder used as reference sample and the tempered as well as laser-structured Ni electrodes. Fitted X-ray photoelectron spectra of NiO powder (c-d), Ni tempered (e-f), and Ni CLPs 0° (g-h). Data were fitted according to Grosvenor et al. [29].

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