Facile synthesis of nickel–copper hollow spheres as efficient bifunctional electrocatalysts for overall water splitting

Abstract

In this work, we report the facile synthesis of NixCuy@C hollow spheres as highly efficient bifunctional electrocatalysts for overall water splitting.

Effective Controlling of Ni3S2/MoS2 Porous Hollow Spheres on Ni Foam by Non‐ionic Surfactant Micelles for Oxygen Evolution Reaction

“…Hollow sphere structure has attracted wide attention in the fields of lithium-ion batteries, [1][2][3] catalysis, [4][5][6] gas sensors [7] and biomedicine [8] due to its special morphology and high specific surface. Hollow sphere structures are used commonly as electrocatalysts, especially for hydrogen evolution reaction, [9] oxygen evolution reaction [10] and oxygen reduction reaction.…”

Thermosensitive Hydrogel Loaded with Nickel–Copper Bimetallic Hollow Nanospheres with SOD and CAT Enzymatic-Like Activity Promotes Acute Wound Healing

“…Ni 4 Cu 2 hollow nanospheres were synthesized using a simple template-free solvothermal method. 45 Solid spheres were obtained at the initial stage in a uniform spherical shape. The faster nucleation of Cu and glycerol contributed to the difference in Cu and Ni distribution.…”

“…The preparation method of Ni 4 Cu 2 hollow nanospheres in this study is described in figure A of Scheme . Ni 4 Cu 2 hollow nanospheres were synthesized using a simple template-free solvothermal method . Solid spheres were obtained at the initial stage in a uniform spherical shape.…”

“…Synthesis of Ni 4 Cu 2 Hollow Spheres. A solution of 0.125 mmol Cu(NO 3 ) 2 •3H 2 O, 0.25 mmol Ni(NO 3 ) 2 •6H 2 O, and 8 mL glycerol was dissolved in 40 mL isopropanol, subsequently transferred to an autoclave lined with Teflon and kept at 180 °C for 6 h. 45 When the precipitate naturally cooled to room temperature, centrifugation was applied, and it was washed several times with ethanol and pure water in turn and freeze-dried at −60 °C.…”

Controlled Synthesis and Uniform Anchoring of Hollow CuxO Nanocubes on Carbon Nanofiber for Enhanced Se(S)–Se(S) Bond Activation

“…The nanomaterials with hollow interiors have gained considerable attention over the past decade due to their promising features such as large specific areas, low density, excellent charge/mass transport, high permeability, and most importantly, the void effect. − As a result, they have a variety of potential applications, such as in drug delivery, , sensors, , batteries, ,, and catalysts. − In the construction of materials with hollow spaces, template-assisted synthesis has been very popular, which involves the adsorption of nanoparticles or polymerization on hard templates such as polymeric or inorganic silica surfaces, followed by removal of the template via calcinations or dissolving with solvents. − However, the associated disadvantages, such as surface functionalization, template removal, and poor mechanical strength of the spherical shell, may restrict its further use in large-scale applications. Template-free approaches can also be used to produce materials with void space through different physicochemical techniques such as Ostwald ripening, − Kirkendall effect, − oriented assembly, , galvanic replacement, , and oxidative etching. − It should be noted that the majority of these approaches led to nanoproducts with spherical morphology and polycrystalline structures , excluding some reports on single-crystal metal oxide nanocubes. − Copper metal with different hollow nanostructures has been receiving much attention owing to its unusual properties and promising applications in diverse fields. − However, there are only a few reports on hollow nanocubes. ,− Hence, it still remains a great challenge to overcome multistep preparation routes, and the need for a simple and environmentally friendly approach for the preparation of hollow CuO ...…”