Ultrathin MoS₂ wrapped N-doped carbon-coated cobalt nanospheres for OER applications

Abstract

The possibilities to resolve the exponential increase in energy demand using water splitting have also triggered huge worldwide attention towards the oxygen evolution reaction using an efficient, earth-abundant and low-cost electrocatalyst.

Gelatin-assisted co-exfoliation of graphene nanoplatelets/MoS2for high-performance supercapacitors

“…The S 2p having characteristic peaks at 161.6 eV and 162.8 eV, which are assigned to S 2p 3/2 and S 2p 1/2 , respectively exhibit the binding energies of S 2− as shown in Fig. S8c † 62.…”

“…S8c. † 62 To the best of our knowledge, this is the rst report on a new and facile synthesis pathway for producing high-quality coexfoliated 2D nanosheets. Therefore, GNP/MoS 2 was further explored for energy storage applications.…”

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

“…The Co@NC@MoS 2 catalyst was synthesized using a hydrothermal treatment of the Co@NC nanoparticles, where Co@NC nanoparticles were dispersed in deionized water and sonicated for 1 h. Afterwards (NH 4 ) 6 -Mo 7 O 24 ·4H 2 O and L-cysteine were added to the Co@NC dispersion and again sonicated for 1 h. The obtained dispersion was transferred into a Teflon-lined autoclave and heated at 200 °C for 20 h. The cooled-down precipitate was recovered by centrifugation, washed with ethanol and water, and dried in a vacuum dryer [ 110 ]. A Co 9 S 8 /graphene composite was obtained with sodium sulfide (Na 2 S) solution mixed with a graphene dispersion followed by ultrasonication and transferred to an autoclave where subsequently cobalt nitrate solution was poured in with gentle stirring whereupon a black gel was formed.…”

Interfacial interaction induced OER activity of MOF derived superhydrophilic Co3O4–NiO hybrid nanostructures

“…Tremendous attempts have been made in the recent past for exploring transition metal (Fe, Ni, Co, Mo) based cost-effective substitutes to replace precious IrO 2 and RuO 2 electrocatalysts. [10][11][12][13][14] The development of transition metal-based electrocatalysts including phosphides, oxides and sulphides [15][16][17] for the oxygen evolution reaction is a well-studied area and currently under exploration. Among them, oxides, due to their structural tenability and high valence state, have attracted considerable attention for the oxygen evolution reaction.…”

“…In Co 3 O 4 , the Co 3+ site is considered as an electrocatalytically active site for the OER by enhancing the deprotonation of OOH* species 11 to O 2 ; similarly, in the nickel oxide surface, Ni 3+ is considered as a highly active site for the OER. 12 Several techniques have been applied to improve the electrocatalytic activities, such as utilizing conductive carbon supports, 13,14 introducing heterointerfaces, 15,16 and doping elements. 17,18 Among these approaches, fabricating heterostructures could modulate the surface electronic structure, induce synergistic effects among different components, and expose more active sites.…”