Oxygen evolution reaction on Ni-substituted Co3O4 nanowire array electrodes

One dimensionally spinel NiCo2O4 nanowire arrays: facile synthesis, water oxidation, and magnetic properties

“…Compared to the conventional twodimensional (2D) planar architecture and 3D porous architecture, electrodes based on 1D ordered architecture can offer several critical advantages, such as facilitating electron transportation, promoting electrolyte penetration, and increasing the electrochemically active surface area (ECSA). Recent reports have also confirmed the great benefit of 1D architecture in enhancing the OER activity [21][22][23].…”

B, N-codoped 3D micro-/mesoporous carbon nanofibers web as efficient metal-free catalysts for oxygen reduction

“…The C dl is determined by measuring the CV curves in the potential range of 0.125e0.175 V without redox processes at different scan rates and taking the current density at 1.275 V as a function of scan rate (Fig. 5(c) and (d)) [45]. As can be seen, the C dl of BNC f -NA is much larger than that of BNC f -N. Thus the NH 3 activation greatly promote the ECSA [46], thereby further enhancing the ORR activity.…”

Nickel Cobaltite Nanostructures for Photoelectric and Catalytic Applications

“…The chronopotentiometric investigation of the Ni x Co 3-x O 4 NW electrode at a 1:1 ratio for OER (Figure 8 e) exhibits nearly constant potentials at different current densities within the whole 10 h, indicating the excellent long-term stability of such nickel cobaltite electrodes. [ 55 ] www.small-journal.com nanoplates, [ 38 ] NiCo 2 O 4 aerogels, [ 125 ] NiCo 2 O 4 nanorods, [ 25 ] and porous nanosheet-stacked NiCo 2 O 4 structures [ 126 ] are also found to be remarkable electrocatalysts for the OER with quite low overpotentials at 0.315 V (vs. SCE electrode), 0.184 V (vs. Hg/HgO electrode), ≈0.31 V (vs. Ag/AgCl electrode), and 0.438 V (vs. SCE electrode), respectively. Moreover, the nanocomposite of NiCo 2 O 4 with other elements or substances can effectively improve its catalytic performance towards the OER.…”

“…[ 42 ] The extensive applications of NiCo 2 O 4 has encouraged the exploration of precise syntheses of particular NiCo 2 O 4 nanostructures. So far, the synthesis of 1D nanowires, [ 43,44 ] nanorods, [ 25,45 ] nanotubes, [ 46 ] 2D nanosheets, [ 15,16,18,28,38,47 ] nanofl akes, [ 31 ] and 3D hierarchical structures [ 48 ] such as urchin-like structures, [49][50][51][52][53] nanofl owers, [ 17 ] and arrays composed of nanowires, [ 11,[54][55][56][57][58] nanorods, [ 59,60 ] nanofl akes, [ 32 ] and nanosheets, [ 61 ] have been comprehensively investigated. One-dimensional NiCo 2 O 4 nanostructured materials provide effi cient pathways for the transport of electrons and ions, leading to faster diffusion kinetics and a higher rate capability for energy-storage applications.…”