Lilac flower-shaped ZnCo₂O₄electrocatalyst for efficient methanol oxidation and oxygen reduction reactions in an alkaline medium

Abstract

A ZnCo2O4 electrocatalyst for the efficient MOR and ORR.

Flower‐Like Superstructures: Structural Features, Applications and Future Perspectives

“…Yoo et al recently reported the lilac flower‐like microstructures of ZnCo 2 O 4 to be an effective electrocatalyst, with high activity for methanol oxidation and oxygen reduction reactions in alkaline medium (Figure 14). [41] They synthesized the ZnCo 2 O 4 lilac flowers by a microwave irradiation method and the lilac flower‐like structure was confirmed by HR‐TEM, containing small nanoparticles as building blocks, with the self‐assembly of these nanoparticles leading to the formation of lilac flower‐like structure. The ZnCo 2 O 4 lilac flower was found to be active for methanol oxidation and oxygen reduction in 0.1 M KOH electrolyte.…”

“… Schematic representation of the growth mechanism of lilac flower‐shaped ZnCo 2 O 4 , and the (A) SEM image of ZnCo 2 O 4 and the corresponding elemental images of cobalt (B), zinc (C), and oxygen (D). Reprinted from [41] permission of the Royal Society of Chemistry.…”

The Effect of an External Magnetic Field on the Electrocatalytic Activity of Heat-Treated Cyanometallate Complexes towards the Oxygen Reduction Reaction in an Alkaline Medium

“…In the last few decades, several concepts and precursors have been utilized to develop many advanced non-precious metal catalysts that show enhanced activity towards the electrochemical reduction of oxygen in both alkaline and acidic media. These materials include metal-organic frameworks [19][20][21][22], conductive-polymer-based complexes (pyrolyzed and non-pyrolyzed) [23,24], non-pyrolyzed transition metal macrocycles [25,26], materials based on metal oxides/carbides/nitrides [27,28], and heat-treated and untreated metal-nitrogen-carbon catalysts [29][30][31]. Recently, a curious approach emerged regarding transition metal-nitrogen-carbon electrocatalytic materials derived from the thermal decomposition of hexacyanometallates, where a carbon-nitrogen-based matrix coordinates metal centers [16,[32][33][34][35][36].…”

In situ microwave-assisted solvothermal synthesis via morphological transformation of ZnCo2O4 3D nanoflowers and nanopetals to 1D nanowires for hybrid supercapacitors

“…[1][2][3] Supercapacitors (SCs) and li-ion batteries (energy storage) and fuel cells (conversion) are the most promising alternative technologies for energy and environmental applications. [4][5][6] Particularly, SCs are also called electrochemical capacitors or ultracapacitors, and are capable of providing a higher power density with an improved long-life than batteries and storing more than the conventional energy storage devices. [7][8][9] Generally energy storage of the SCs depend on ionic adsorption (for electrical double-layer capacitors, EDLCs) or fast surface redox reactions (for pseudocapacitors).…”