Nanosheets assembled into nickel sulfide nanospheres with enriched Ni³⁺ active sites for efficient water-splitting and zinc–air batteries

Abstract

Nanosheets assembled into nickel sulfide nanospheres were synthesized in a controlled manner, and exhibited superior tri-functional activities owing to optimized binding with hydrogen/oxygen intermediates.

Boosting Oxygen Evolution Reaction on Metallocene‐based Transition Metal Sulfides Integrated with N‐doped Carbon Nanostructures

“…Moreover, higher HER current density was observed in the Ni 9 S 8 /Ni 3 S 2 −NC than Co 9 S 8 −NC during the cathodic activation step as clearly seen in Figure S2. It is mainly due to the formation of surface‐enriched Ni 3+ sites with the favorable coordination environment after the anodic activation process, which significantly contributes to enhance its HER catalytic activity [37] . This work is considered to be a simple, convenient, and efficient method to attain the highly proficient and inexpensive electrocatalysts that can be obtained by simple electrochemical activation process compared to conventional physicochemical methods.…”

Hierarchical Carbon/Metal Nanostructure with a Combination of 0D Nanoparticles, 1D Nanofibers, and 2D Nanosheets: An Efficient Bifunctional Catalyst for Zinc‐Air Batteries

“…[14] To this end, various carbon and non-precious transition metal-based materials (e. g., oxides, sulfides, and nitrides) have been extensively explored as bifunctional oxygen catalysts recently. [15][16][17][18][19][20][21][22][23][24] In principle, hierarchically porous structure, high specific surface area, and good electronic conductivity are essential parameters for electrocatalysts since they are beneficial to exposing more active sites and promoting electrolyte diffusion and mass transmission. Therefore, various nanomaterials and/or nanostructures including 0D metal single-atoms/ clusters/nanoparticles, [25][26][27] 1D nanowires/nanotubes/nanofibers (e. g., carbon nanotubes, carbon nanofibers), [28][29][30] and 2D nanosheets (e. g., graphene, carbon nanosheets) [31,32] have been rationally designed for oxygen catalysts.…”

“…To this end, various carbon and non‐precious transition metal‐based materials ( e. g ., oxides, sulfides, and nitrides) have been extensively explored as bifunctional oxygen catalysts recently [15–24] . In principle, hierarchically porous structure, high specific surface area, and good electronic conductivity are essential parameters for electrocatalysts since they are beneficial to exposing more active sites and promoting electrolyte diffusion and mass transmission.…”

Electrocatalytic hydrogen evolution properties of anionic NiS 2 ‐Ni(OH) 2 nanosheets produced on the surface of nickel foam

“…13,14 Improvements in conductivity and the number of active sites exposed on the electrode material can effectively improve the electrocatalytic performance. 15,16 Therefore, transition metal compounds (eg, sulfide, [17][18][19][20][21][22] hydroxide, 23 phosphide, [24][25][26][27] oxide, 28 and nitride 29,30 ) have become the focus of research by many scientists.…”