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Chemical Properties

6mm pieces and smaller with 99.5% purity; yellow hexagonal [KIR79] [CER91]

Check Digit Verification of cas no

The CAS Registry Mumber 1307-99-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,0 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1307-99:
(6*1)+(5*3)+(4*0)+(3*7)+(2*9)+(1*9)=69
69 % 10 = 9
So 1307-99-9 is a valid CAS Registry Number.
InChI:InChI=1/Co.Se/rCoSe/c1-2

1307-99-9 Well-known Company Product Price

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  • Alfa Aesar

  • (40224)  Cobalt(II) selenide, 99+% (metals basis)   

  • 1307-99-9

  • 50g

  • 1938.0CNY

  • Detail
  • Alfa Aesar

  • (40224)  Cobalt(II) selenide, 99+% (metals basis)   

  • 1307-99-9

  • 250g

  • 9670.0CNY

  • Detail

1307-99-9SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name Cobalt(II) Selenide

1.2 Other means of identification

Product number -
Other names selanylidenecobalt

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:1307-99-9 SDS

1307-99-9Downstream Products

1307-99-9Relevant articles and documents

Mechanism and improvement strategy of CoSe capacity change during lithiation/delithiation

Wang, Qingtao,Hou, Minmin,Liu, Dongxu,Zhou, Xiaozhong,Lei, Ziqiang

, (2021)

Studying the reaction mechanism of materials in the process of lithiation/delithiation is important to understand and optimize the electrode materials. In this work, the petal-like CoSe is prepared by a simple hydrothermal method, and its lithium storage mechanism is studied. During the charge/discharge cycles, the capacity of the CoSe decreases first and then increases. In the initial stage, the volume of CoSe expands due to the intercalation of lithium ions, which results in the amorphousness of CoSe and reduces the specific capacity. The subsequent increase in capacity is due to the recrystallization of the material and the formation of a conductive SEI film. The petal-like CoSe displays a specific capacity of 450 mA h g?1 at the current density of 100 mA g?1 after 300 cycles. To improve the lithium storage performance, a CoSe/rGO composite is prepared. The addition of GO during the preparation of CoSe changes the morphology of CoSe from a larger petal shape to a smaller rod shape, which weakens the effect of volume change during lithium ion intercalation and shortens the lithium ion diffusion distance, so improves the reduction of specific capacity. At a current density of 100 mA g?1, the specific capacity of CoSe/rGO composite can be as high as 730 mA h g?1 after 200 cycles. Even under a large current density of 1000 mA g?1, the specific capacity of the CoSe/rGO composite can still reach 570 mA h g?1 after 1000 cycles.

Evaluating DNA Derived and Hydrothermally Aided Cobalt Selenide Catalysts for Electrocatalytic Water Oxidation

Karthick, Kannimuthu,Jagadeesan, Sathya Narayanan,Kumar, Piyush,Patchaiammal, Swathi,Kundu, Subrata

, p. 6877 - 6884 (2019)

Electrocatalysts with engaging oxygen evolution reaction (OER) activity with lesser overpotentials are highly desired to have increased cell efficiency. In this work, cobalt selenide catalysts were prepared utilizing both wet-chemical route (CoSe and CoSe-DNA) and hydrothermal route (Co0.85Se-hyd). In wet-chemical route, cobalt selenide is prepared with DNA (CoSe-DNA) and without DNA (CoSe). The morphological results in the wet-chemical route had given a clear picture that, with the assistance of DNA, cobalt selenide had formed as nanochains with particle size below 5 nm, while it agglomerated in the absence of DNA. The morphology was nano networks in the hydrothermally assisted synthesis. These catalysts were analyzed for OER activity in 1 M KOH. The overpotentials required at a current density of 10 mA cm-2 were 352, 382, and 383 mV for Co0.85Se-hyd, CoSe, and CoSe-DNA catalysts, respectively. The Tafel slope value was lowest for Co0.85Se-hyd (65 mV/dec) compared to CoSe-DNA (71 mV/dec) and CoSe (80 mV/dec). The chronoamperometry test was studied for 24 h at a potential of 394 mV for Co0.85Se-hyd and was found to be stable with a smaller decrease in activity. From the OER study, it is clear that Co0.85Se was found to be superior to others. This kind of related study can be useful to design the catalyst with increased efficiency by varying the method of preparation.

Solid-solution hexagonal Ni0.5Co0.5Se nanoflakes toward boosted oxygen evolution reaction

Zhu, Lei,Liao, Yanxin,Jia, Yubao,Zhang, Xin,Ma, Ruguang,Wang, Kuikui

, p. 13113 - 13116 (2020)

The oxygen evolution reaction (OER) with sluggish kinetics is a bottleneck for the large-scale application of water electrolysis. Herein, solid-solution hexagonal Ni0.5Co0.5Se nanoflakes are designed and successfully synthesized via a facile hydrothermal method with a much lower overpotential of 216 mV at 10 mA cm-2 and a Tafel slope of 37.08 mV dec-1. This journal is

Facile synthesis of CoSe nanoparticles encapsulated in N-doped carbon nanotubes-grafted N-doped carbon nanosheets for water splitting

Feng, Fan,Huang, Xiaokang,Jiang, Pengbo,Lan, Kai,Li, Rong,Li, Shuwen,Wang, Kaizhi,Yang, Honglei,Yang, Ming,Yang, Yuanyuan

, (2020)

Rationally designing a high-efficiency, inexpensive and stable electrocatalyst is important in the renewable energy field. Herein, a one-step strategy is adopted to synthesize 3D hybrid of CoSe nanoparticles encapsulated nitrogen-doped carbon nanotubes graft onto nitrogen-doped carbon nanosheets (denoted as CoSe?NCNT/NCN) with excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activity in acidic and alkaline solutions, respectively. Benefiting from the unique morphology, the large surface area and good conductivity, the hybrid exhibits excellent electrocatalytic HER activity in 0.5 M H2SO4 solution, which is a low overpotential of 197 mV at a current density of 10 mA cm?2 with a Tafel slope of 43 mV dec?1. Meanwhile, it presents a low overpotential of 301 mV at a current density of 10 mA cm?2 with a Tafel slope of 75 mV dec?1 in 1 M KOH solution for OER. The good electrocatalytic property is comparable to most of the previously reported Co-based electrocatalysts and the synthetic method is low toxic and simple, which may be expanded to other transition metal dichalcogenides. The strategy provides a possibility for preparation for effective nonprecious high performance HER and/or OER electrocatalysts.

Cobalt selenide nanostructures: Hydrothermal synthesis, considering the magnetic property and effect of the different synthesis conditions

Sobhani, Azam,Salavati-Niasari, Masoud

, p. 1089 - 1094 (2016)

Cobalt selenide (CoSe) nanostructures are produced via hydrothermal route from the reaction of cobalt salt and SeCl4 as precursors, in the presence of surfactant (CTAB, PVA, SDS) and reductant (N2H4.H2O). It is found that the temperature reaction, type of cobalt salt and surfactant play important roles in controlling the composition, structure, morphology and particle size of products. The experimental techniques of XRD, SEM, TEM, EDX and VSM are used to characterize the products and study their magnetic properties.

Inception of Co3O4as Microstructural Support to Promote Alkaline Oxygen Evolution Reaction for Co0.85Se/Co9Se8Network

Ghosh, Sourav,Tudu, Gouri,Mondal, Ayan,Ganguli, Sagar,Inta, Harish Reddy,Mahalingam, Venkataramanan

, p. 17326 - 17339 (2020)

Developing electrocatalysts with abundant active sites is a substantial challenge to reduce the overpotential requirement for the alkaline oxygen evolution reaction (OER). In this work, we have aimed to improve the catalytic activity of cobalt selenides by growing them over the self-supported Co3O4 microrods. Initially, Co3O4 microrods were synthesized through annealing of an as-prepared cobalt oxalate precursor. The subsequent selenization of Co3O4 resulted in the formation of a grainy rodlike Co3O4/Co0.85Se/Co9Se8 network. The structural and morphological analysis reveals the presence of Co3O4 even after the selenization treatment where the cobalt selenide nanograins are randomly covered over the Co3O4 support. The resultant electrode shows superior electrocatalytic activity toward OER in alkaline medium by delivering a benchmark current density of 10 mA/cm2geo at an overpotential of 330 mV. As a comparison, we have developed Co0.85Se/Co9Se8 under similar conditions and evaluated its OER activity. This material consumes an overpotential of 360 mV to deliver the benchmark current density, which signifies the role of the Co3O4 support to improve the electrocatalytic activity of Co0.85Se/Co9Se8. Despite having a low TOF value for Co3O4/Co0.85Se/Co9Se8 (0.0076 s-1) compared to Co0.85Se/Co9Se8 (0.0102 s-1), the improved catalytic activity of Co3O4/Co0.85Se/Co9Se8 is attributed to the presence of a higher number of active sites rather than the improved per site activity. This is further supported from the Cdl (double layer capacitance) measurements where Co3O4/Co0.85Se/Co9Se8 and Co0.85Se/Co9Se8 tender Cdl values of about 8.19 and 1.08 mF/cm2, respectively, after electrochemical precondition. As-prepared Co3O4/Co0.85Se/Co9Se8 also manifests rapid kinetics (low Tafel slope ~91 mV/dec), long-term stability, low charge-transfer resistance, and 82% Faradaic efficiency for alkaline electrocatalysis (pH = 14). Furthermore, the proton reaction order (ρRHE) is found to be 0.65, indicating a proton decoupled electron transfer (PDET) mechanism for alkaline OER. Thus, the Co3O4 support helps in the exposure of more catalytic sites of Co0.85Se/Co9Se8 to deliver the improved catalytic activities in alkaline medium.

Mandale, A. B.,Badrinarayanan, S.,Date, S. K.,Sinha, A. P. B.

, p. 61 - 72 (1984)

Hexagonal CoSe formation in mechanical alloyed Co75Se 25 mixture

Campos,De Lima,Grandi,Machado,Drago,Pizani

, p. 265 - 270 (2004)

A hexagonal CoSe alloy with NiAs-type structure was obtained by mechanical alloying starting from a mixture of pure crystalline powders with nominal composition Co75Se25. X-ray diffraction (XRD), differential scanning calorimetry (DSC), M?ssbauer spectroscopy (MS) and Raman scattering (RS) techniques were used to follow the structural, thermal, magnetic and optical properties of the binary mixture as a function of milling time. XRD results show the formation of a nanometric hexagonal CoSe phase between 3 and 70 h of milling coexisting with non-reacted Co phases, also in nanometric scale. DSC and RS results showed some changes in the thermal and optical properties of the crystalline phases when the milling time increases. The Raman active modes of the CoSe and Co oxide phases were observed. MS results showed practically no iron in the samples milled up to 15 h, while for extended milling times (70 h), they showed the presence of some α-Fe and the formation of other iron alloys due to the contamination by the milling media.

Electrodeposition of cobalt selenide thin films

Liu, Fangyang,Wang, Bo,Lai, Yanqing,Li, Jie,Zhang, Zhian,Liu, Yexiang

, p. D523-D527 (2010)

Cobalt selenide thin films have been prepared onto tin oxide glass substrates by electrodeposition potentiostatically from an aqueous acid bath containing H2SeO3 and Co (CH3COO)2 at 50°C. The electrodeposition m

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