Co3O4@Co3S4 core-shell neuroid network for high cycle-stability hybrid-supercapacitors

Oxygen and sulfur dual vacancy engineering on a 3D Co3O4/Co3S4heterostructure to improve overall water splitting activity

“…In addition, it can be obtained by partially replacing the oxygen atom in Co 3 O 4 with a sulfur atom, and thus maintaining the aboriginal spinel structure of Co 3 O 4 . [38][39][40] To the best of our knowledge, the combination of oxygen vacancy and sulfur vacancy as the overall water splitting electrocatalyst has not been reported yet.…”

One‐Dimensional Spinel Transition Bimetallic Oxide Composite Carbon Nanofibers (CoFe2O4@CNFs) for Asymmetric Supercapacitors

“…At the same time, the shapes of these CV curves are considered as quasi-rectangular shapes with redox peaks, and there are both double-layer capacitance and faraday pseudo-capacitance behavior on the ASC. [46] As shown in Figure 8(d), the GCD curves at current densities from 1 A g À 1 to 5 A g À 1 are used to further evaluate the ASC, and the specific capacitance value is 53.3 F g À 1 at the current density of 1 A g À 1 . Besides, cycle stability has a great influence on the practical application of a supercapacitor, and the stability of 7000 cycles at 1 A g À 1 for the CFO/C-800-2//AC ASC is tested.…”

Revealing the Structural Transformation between the Activity and Stability of 2D and 3D Co–Mo Metal–Organic Frameworks for a Highly Active Oxygen Evolution Reaction

“…The development of robust, cost-effective, and high-activity catalysts to reduce energy barriers and improve the reaction efficiency has received increasing attention. Recently, organicmodulated metallic materials, 6−8 oxides, 9−11 oxyhydroxides, 12−15 nitrides, 16−18 sulfides, 19,20 phosphides, 21,22 and also non-noble metal-based 23−25 OER catalysts have shown excellent electrocatalytic activity for water oxidation. Currently, cobalt (Co)-derived catalysts demonstrate better activity for OERs.…”

“…The development of robust, cost-effective, and high-activity catalysts to reduce energy barriers and improve the reaction efficiency has received increasing attention. Recently, organic-modulated metallic materials, − oxides, − oxyhydroxides, − nitrides, − sulfides, , phosphides, , and also non-noble metal-based − OER catalysts have shown excellent electrocatalytic activity for water oxidation. Currently, cobalt (Co)-derived catalysts demonstrate better activity for OERs. , During the water oxidation reaction, the Co-derived catalyst undergoes several intermediate steps involving primary electrochemical phase conversion from a hydroxyl (−OH) to (oxy)­hydroxyl (−OOH). ,, This type of phase conversion can tune the Gibbs free energy of adsorbed hydrogen, resulting in balanced metal–OH bonding, which will help improve the intrinsic catalytic activity of the OER.…”