Zaiwei Cai, Zihao Li, Yingtao Zhang, Chiyi Wei, Hao Tian, Molei Hao, Xiaoming Wei, Zhongmin Yang, "High repetition rate ultrafast laser-structured nickel electrocatalyst for efficient hydrogen evolution reaction," Adv.Photon.Nexus 2, 056009 (2023)
- Advanced Photonics Nexus
- Vol. 2, Issue 5, 056009 (2023)
Fig. 1. SEM images of (a)–(c) low scan speed group samples S-2, S-4, and S-6; (d)–(f) high scan number group samples N-50, N-150, and N-250; and (g)–(i) high-pulse fluence group samples F-1, F-2, and F-3.
Fig. 2. Schematic illustration of the morphology formation processes of (a) a low scan speed group sample and (b) a high scan number group sample.
Fig. 3. Energy-dispersive spectroscopy mapping images of (a) S-2, (b) N-150, and (c) F-3. (d) XRD pattern of S-2.
Fig. 4. Linear sweep voltammograms of (a) low scan speed group, (b) high scan number group, and (c) high-pulse fluence group and bare Ni electrodes.
Fig. 5. Electrochemical impedance spectra and the corresponding fitted curves of (a) low scan speed group, (b) high scan number group, and (c) high-pulse fluence group and bare Ni electrodes. (d) Equivalent circuit used for fitting.
Fig. 6. Chronopotentiograms of (a) low scan speed group, (b) high scan number group, and (c) high-pulse fluence group and bare Ni electrodes.
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Table 1. Key parameters used in laser structuring of different groups of samples.
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