12013-10-4

Usage

Uses

Used in Energy Storage Industry:
Cobalt (IV) Sulfide is used as a battery electrode material for its good electrochemical properties. It is particularly effective in lithium sulfur batteries, thermal batteries, and lithium-ion secondary batteries, making it a valuable component in the development of advanced energy storage solutions.
Used in Electronics Industry:
Due to its enhanced energy efficiency, Cobalt (IV) Sulfide can also be utilized in the electronics industry for various applications, such as improving the performance of electronic devices and components that require efficient energy storage and delivery systems.

InChI:InChI=1/Co.2S/q+4;2*-2

Upstream product

• 7783-06-4 hydrogen sulfide 
• 71-48-7 cobalt(II) acetate 
• 12135-76-1 ammonium sulfide 
• 22541-53-3 cobalt(II) 
• 13859-51-3 pentaaminechlorocobalt(III) dichloride 
• 22868-13-9 sodium disulfide 
• 7646-79-9 cobalt(II) chloride 
• 10544-50-0 sulfur 
• 295-37-4 1,4,8,11-Tetraazacyclotetradecane 
• 7704-34-9 sulfur 
• 1313-82-2 sodium sulfide 
• 17356-08-0 thiourea 
• 7757-83-7 sodium sulfite 
• 52-90-4 L-Cysteine 

Relevant academic research and scientific papers

Solid state synthesis of binary metal chalcogenides

Solid state reaction of metal halides MXn (n = 1 or 2) with stoichiometric amounts of sodium chalcogenide (Na2S2 or Na2E where E = S, Se or Te) at 300 °C for 48 h in evacuated ampoules affords a range of transition and main-group metal chalcogenides: ME2 (M = Fe or Co, E = S or Te); M(1-x)E (M = Fe or Co, E = S); Ag2E (E = S, Se or Te), Ni(1-xE (E = S, Se or Te); NiS2, MnS, FeSe, SnSe and SnTe along with co-formed salt. Washing of the highly sintered, fused product mixture with water resulted in isolation of crystalline binary chalcogenides, typically of a single phase in good yield (90%). The products were characterised by X-ray powder diffraction, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDXA) and infrared spectroscopy.

The preparation and phase transformation of nanocrystalline cobalt sulfides via a toluene thermal process

Nanocrystalline cobalt sulfides were prepared by the reactions between cobalt chlorides and sodium polysulfide via a toluene thermal process in the temperature range 120-170°C. Two single phases of Co9S8 and CoS2 were obtained. TEM microphotos showed that the Co9S8 and CoS2 particles were both spherical in shape with sizes of about 20 nm. Chemical analysis gave the formulas Co9S7.93 and CoS1.97, respectively. The transformations among cobalt sulfides (Co9S8, Co3S4, and CoS2) with changing reaction conditions and precursors were studied.

On the synergism between La2O2S and CoS2 in the reduction of SO2 to elemental sulfur by CO

In our study of the catalytic reduction of SO2 to elemental sulfur by CO in the presence of La2O2S and CoS2, a synergistic effect between the two sulfides was observed which not only increased the catalytic activity but also suppressed the formation of the side-product COS. It was also found that the crystal phase of CoS2, which can be easily reduced by CO, could be retained when La2O2S coexisted even in small quantities. A mechanism was proposed based on the COS intermediate mechanism and the remote control concept.

A Solution-based Method for Synthesizing Pyrite-type Ferrous Metal Sulfide Microspheres with Efficient OER Activity

Simple and stable synthesis of transition metal sulfides and clarification of their growth mechanisms are of great importance for developing catalysts, metal-air batteries and other technologies. In this work, we developed a one-step facile hydrothermal approach to successfully synthesize NiS2 microspheres. By changing the experimental parameters, the reason that affects the formation of nanostructured spheres is investigated and discussed in detail, and the formation mechanism of microspheres is proposed innovatively. Furthermore, electrochemical testing results show that the 7 h-NiS2 catalyst exhibits a remarkable oxygen evolution reaction (OER) activity with an overpotential of 311 mV at 10 mA cm?2 in 1.0 M KOH, superior to precious metal RuO2. The NiS2 catalyst also exhibits a robust durability. This work will contributes to the rational design and the understanding of growth mechanism of transition metal chalcogenide electrocatalysts for diverse energy conversion technologies.

Synthesis and properties of cobalt sulfide phases: CoS2 and Co9S8

Single phase cobalt disulfide (CoS2) nanoparticles were prepared by thermal decomposition of cobalt-thiourea complex at a low temperature (400 °C). CoS2 nanoparticles exhibit ferromagnetic ordering at 122 K below which the temperatur

Magnetic properties of Co(S1-xSex)2 under high magnetic field and high pressure

The magnetization of the metamagnetic Co(S1-xSex)2 system with 0 ≤ x ≤ 0.2 has been measured under high magnetic field and high pressure. The magnetic phase diagram is determined in the x-T plane. The magnetic properties a

X-RAY PHOTOELECTRON SPECTRA OF 3d TRANSITION METAL PYRITES.

Photoelectron spectra of the synthetic compounds FeS//2, CoS//2, NiS//2, MnSe//2, CoSe//2, and NiSe//2 and of a natural crystal of MnS//2, all with the pyrite structure, are reported. The sulfur 3s and selenium 4s contributions are split into peaks for bonding and antibonding orbitals due to the covalent bonding in the molecular anion pairs. The difference in lineshape of the peaks for the bonding and antibonding orbitals is attributed to vibronic effects. The metal 2p//3/////2 spectra show the effects of multiplet splitting and satellites due to shake-up or shake-off processes. The valence band spectra consist of slightly overlapping contributions of anion p and metal 3d electrons. The metal 3d spectrum of FeS//2 has a single strong peak of width 0. 9 eV.

Pyrite formation via kinetic intermediates through low-temperature solid-state metathesis

The preparation of materials with limited phase stabilities yet high kinetic activation barriers is challenging. Knowledge of their possible formation pathways aids in addressing these challenges. Metathesis reactions present an approach to circumvent these barriers; however, solid-state metathesis reactions are often too rapid from extensive self-heating to understand the reaction. The stoichiometric reaction of MCl2 salts (M = Mn, Fe, Co, Ni, Cu, Zn) with Na2S2 enables the formation of pyrite (FeS2), CoS2, and NiS2 at low temperatures (250-350 °C). Na2S2 has the same polyanionic dimer as found in the pyrite structure, which would suggest the possibility of a facile ion-exchange reaction. However, from high-resolution synchrotron X-ray diffraction and differential scanning calorimetry, the energetic driving force does not appear to result solely from NaCl formation but also from formation of intermediate and pyrite phases. It is apparent that the reaction proceeds through polyanionic disproportionation and formation of a low-density alkali-rich intermediate, followed by anionic comproportionation and atomic rearrangement into the pyrite phase. These results have profound implications for the use of low-temperature metathesis in achieving materials by design.

In situ synthesis of CoS2/RGO nanocomposites with enhanced electrode performance for lithium-ion batteries

This study reports a novel strategy of preparing CoS2/reduced graphene oxides (RGO) nanocomposites by employing graphene oxides (GO) as an oxidizing agent and Na2S2O3 as a reducing agent. CoS2 can be in situ synthesized with GO being reduced. X-ray diffraction (XRD), Raman spectrometry, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electrochemical test are used to characterize the nanocomposite. The CoS2 particles with the size of 150 nm are dispersed in the networks made from thin RGO nanosheets. The CoS 2/RGO nanocomposite as an anode material for lithium-ion batteries can deliver excellent reversible capacity retention (640 mA hg-1) after cycling 50 times when tested at 100 mA g-1 and rate performance. The enhanced electrochemical properties can be attributed to the nanoscale particles sizes of CoS2 in addition to the effects of RGO networks in preventing the agglomeration of CoS2 and absorbing lithium polysulfides during the charge-discharge processes.

Electronic effect of substituents on the hydrodesulfurization of ring substituted benzenethiols

To clarify the electronic factors of the reactants affecting hydrodesulfurization (HDS) reactivity, the o-, m- and p-isomers of aminobenzenethiol (ABT), methoxybenzenethiol (MBT) and toluenethiol (TT) were hydrogenolyzed by a batch method over CoS2, NiS2 and a presulfided commercial HDS catalyst. In the hydrogenolysis of all the isomers of ABT, MBT and TT, HDS by cleavage of the C-S bond occurred selectively and was promoted by the presence of electron-releasing substituents in the ortho- and para-positions. Among the quantities obtained from the MINDO/3 calculation for a reactant, the next three are especially interesting: these are the coefficients of the ipso-carbon and the sulfur atoms in the highest occupied π-orbital (π-HOMO), CCHOMO and CSHOMO, and the energy level of π-HOMO. The differences in reactivity among the isomers of a substituted benzenethiol can be interpreted by use of the frontier π-electron densities (FED), 2(CCHOMO)2 and 2(CSHOMO)2. On the other hand, the differences in reactivity among the molecules, i.e., ABT, MBT, TT, and benzenethiol, shows a close correlation with the ratio of the two FEDs, (CCHOMO/CSHOMO)2, and also with the energy level of π-HOMO. It is suggested that the energy level and the FED assume an important role in the HDS reactivities and that the magnitudes of the FEDs on the positions of both the sulfur and the ipso carbon atoms affect the reactivities not independently but concertedly.