Kirkendall effect Strengthened-Superhydrophilic/superaerophobic Co-Ni3N/NF heterostructure as electrode catalyst for High-current hydrogen production

Designed Synthesis and Electrochemical Performance Regulation of the Hierarchical Hollow Structure Cu2S/Cu7S4/NC Anode for Hybrid Supercapacitors

“…The formation of the unique structure, on the one hand, is due to the uniform coating of a dense carbon layer on the surface of the Cu 2 O template, which could stabilize the cubic structure after the following treatments. On the other hand, because of the concentration and diffusion rate differences of the S 2– ions and Cu + ions, according to the Kirkendall effect, − the consumption rate of Cu 2 O core is higher than the growth rate of copper sulfide shell, which is beneficial for the generation of hollow structures.…”

“…During this process, the dosage of Na 2 S·9H 2 O could greatly increase the S 2– ion concentration near the surface of the annealed product, leading to a larger concentration difference between the Cu + ions and the S 2– ions. Therefore, the S 2– ions prefer to diffuse along the concentration gradient during the reaction, reacting with Cu + ions on the carbon material to generate copper-based sulfide, and the hollow structure could be formed because of the Kirkendall effects. − As the gradual growth of the sulfide and the diffusion of the Cu + ions, the sulfide could be generated on both sides of the carbon layer. Then, the above product is etched by aerobic acid to eliminate the residue impurities.…”

Three-dimensional nickel nanowires modified by amorphous Fe nanosheets as electrocatalysts for the oxygen evolution reaction

“…In addition, the bubble separation characteristics on the surface of electrode materials have a great influence on the stability of the structure, while the small size and high-frequency bubble release has little influence on the surface structure, resulting in good stability. 52,53…”

“…In addition, the bubble separation characteristics on the surface of electrode materials have a great influence on the stability of the structure, while the small size and high-frequency bubble release has little influence on the surface structure, resulting in good stability. 52,53 In LSV tests, carried out in 1 M KOH electrolyte at a scanning rate of 5 mV s −1 , Fe/Ni NWs/NF exhibited the highest current density, pointing to its highest intrinsic catalytic activity towards the OER (Fig. 5a).…”

Performance of Low-Pressure-Plasma-Processed RuCo Electrocatalysts for Hydrogen Evolution Reaction

“…In addition to the successful removal of surface organic pollutants, the increase in the surface area of the plasma-treated electrode produced more vacancies, making the electrolyte solution penetrate the electrode more easily. 36,37 Furthermore, the surface of the hydrophilic structure showed air repellency under water; in particular, it repelled the underwater bubbles generated during the HER process, making the bubbles detach easily and promoting interface charge transfer. [38][39][40] XPS and XRD.-XRD analysis was performed to identify the crystal structures of the prepared samples.…”