An Efficient Bi-functional Electrocatalyst Based on Strongly Coupled CoFe 2 O 4 /Carbon Nanotubes Hybrid for Oxygen Reduction and Oxygen Evolution

Tunable Bifunctional Activity of MnxCo3−xO4 Nanocrystals Decorated on Carbon Nanotubes for Oxygen Electrocatalysis

“…However,f urthere fforts are needed to enhance their efficiency,r educe toxicity,a nd increase electronic conductivity.P art of the issues can be addressed by multicomponent metal oxidest hrough improved electron hopping and enriched metal-ion redoxc ouples. [21] Recently,m ore abundant and cost-effectivem anganese-based [22] or combined cobaltmanganese complexes [19,[23][24][25] have shown promise for electrocatalysis over other spinel oxides, such as NiCo 2 O 4 , [26][27][28] CoFe 2 O 4 , [29][30][31] and ZnCo 2 O 4 . [32] Recent studies reveal that the spinelM n x Co 3Àx O 4 is ap otential candidate, and the corresponding activities can be further tuned through its phase and composition.…”

A Review of Carbon-Composited Materials as Air-Electrode Bifunctional Electrocatalysts for Metal–Air Batteries

“…have gained much attention because of their low costs, considerable activities, high abundance (stability), and environmental friendliness [136][137][138]. To achieve better catalytic activities toward ORR and OER, however, net spinel oxides are usually attached onto conducting carbon substrates with the aim of assuring fast electron transport and good interaction between oxides and carbon [136].…”

Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

“…SEM images for CoFe 2 O 4 electrodeposited on CCC are given in Figure S3a [15]. The electrochemical effective surface area was calculated using cyclic voltammetry (CV) curves in the non-faradic region ( Figure S5) and the plotting relation of current density with respective scan rate is given in Figure 4d [31]. Another hybrid of CoFe 2 O 4 nanoparticles supported on nitrogen/sulfur dual-doped three-dimensional (3D) reduced graphene oxide networks (CFO/NS-rGO) showed an overpotential of about 0.55 V to achieve the current density of 10 mA/cm 2 [32].…”

“…The chronical current measurement showed almost constant values without any detriment over the catalytic performance of the electrodes, suggesting the durable performance of the electrode for longterm use. As several reports suggest the use of spinels for multifunctional catalytic application [7,31,40], herein we evaluated the performance of the CoFe2O4 ED@NF electrode for HER catalysis. Figure S6a As several reports suggest the use of spinels for multifunctional catalytic application [7,31,40], herein we evaluated the performance of the CoFe 2 O 4 ED@NF electrode for HER catalysis.…”

“…Several methods such as solvothermal, hydrothermal, chemical co-precipitation, and solution reduction reaction are reported for the synthesis of iron-cobalt oxide [30][31][32][33][34][35]. Most of the synthesized iron-cobalt oxide samples were powders, which are coated onto conductive substrates by dip-coating.…”