Hierarchical Ni3S2-NiOOH hetero-nanocomposite grown on nickel foam as a noble-metal-free electrocatalyst for hydrogen evolution reaction in alkaline electrolyte

Nickel sulfide nanostructures prepared by laser irradiation for efficient electrocatalytic hydrogen evolution reaction and supercapacitors

“…Recently, Wang et al reported that amorphous Ni 3+ OOH electrodeposited on the Ni3S2@nickel foam exhibited synergistic effect for improving its electrocatalytic HER activity in 1 M NaOH electrolyte [20]. The Raman spectra of NiS compounds synthesized by 2h, 4h and 6h (Fig.…”

Fabrication of Magnetic Superstructure NiFe2O4@MOF-74 and Its Derivative for Electrocatalytic Hydrogen Evolution with AC Magnetic Field

“…The Tafel slope of sample NC-1/2 is 106 mV dec −1 , much lower than that of samples NM-0 (268 mV dec −1 ), NM-1/8 (181 mV dec −1 ), NM-1/4 (147 mV dec −1 ), and NM-1/2 (141 mV dec −1 ), suggesting its enhanced HER kinetics. 54,55 The Nyquist curves shown in Figure 6d indicate that sample NC-1/2 displays the smallest semicircle diameter than other samples, demonstrating a faster charge transfer rate, 56 but a slightly larger electrolyte resistance, which is related to the form of MgO with poor electrical conductivity (the content of MgO in the sample is 39.8 wt %; the calculation details are shown in the Supporting Information). Besides, electrochemically active surface areas (ECSA) estimated by C dl is also used to evaluate the HER activity of samples.…”

Design, Synthesis and High HER Performances of 3D Ni/Mo Sulfide on Ni Foam

“…). [28] The emergence of Ni 3 S 2 in the samples indicates that the surface of the nickel foam was transformed into Ni 3 S 2 by reaction with H 2 S, which was oriented from ammonium tetrathiomolybdate. [37] To identify the morphology of the product, the scanning electron microscope (SEM) image was recorded ( Figure 1-c).…”

“…[26] Its HER catalysis ability also needs to be further enhanced, however. Several attempts have been conducted to improve the catalysis efficiency by combination with other materials such as NiOOH, [27] Co (OH) 2 , [28] VS 2 , [29,30] Co 9 S 8 , [31] MoS 2 [32,33] or others. [34] All these efforts are beneficial to the enhancement of HER performances, but complex synthesis limits large production and industrial usage.…”