D-tracer study of butadiene hydrogenation and tetrahydrothiophen hydrodesulphurisation catalysed by Co9S8

Hoodless, R. C.; Moyes, R.B.; Wells, Peter B.

doi:10.1016/j.cattod.2006.02.078

Cited by 42 publications

(24 citation statements)

References 23 publications

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“…The phase diagram of the Co-S system is complicated due to the coexistence of strongly reducible cobalt and oxidizable sulfur ion [34]. Cobalt sulfides are reported to have potential applications as catalysts [35, 36], capable of splitting water to produce hydrogen [37], magnetic materials [34, 38], counter electrodes for solar cells [39, 40, 41], anode materials for advanced lithium ion batteries [42, 43, 44] and high-performance supercapacitors [45, 46, 47, 48]. …”

Section: Introductionmentioning

confidence: 99%

“…More recently, Hoodles et al [35] prepared Co 9 S 8 by heating Co 3 O 4 in a stream of 9.8% H 2 S in H 2 . Milder routes for the synthesis of nanosized cobalt sulfides have been developed during the last decade, like decomposition of cobalt−thiourea complexes [33, 50], wet chemical methods [36, 41, 42], microwave assisted methods [32, 48], and in the first place the hydrothermal/solvothermal method [34, 39, 43, 46, 47, 49, 50, 51, 52].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Kristl

Dojer

Gyergyek

et al. 2017

Heliyon

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Nickel and cobalt sulfides are promising materials in different cutting-edge research areas like solar cells, supercapacitors, catalysts, and electrode materials. Nickel and cobalt sulfides with various stoichiometries have been synthesized sonochemically from Ni(CH3COO)2 ∙ 4H2O, Co(CH3COO)2 ∙ 2H2O and different sulfur precursors using a direct immersion ultrasonic probe. The products were characterized by X-ray powder diffraction, transmission electron microscopy (TEM) including EDX analysis, IR and UV–Vis spectroscopy and elemental analysis. Following products have been obtained: NiS, Ni3S4, CoS1.097 and Co9S8, with average crystallite sizes in the range 7−30 nm. Effects of different reaction conditions on the size, morphology and optical band-gap energy were evaluated. Optical band-gap energies in the range 3.3 eV−3.8 eV were observed for the obtained nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Kristl

Dojer

Gyergyek

et al. 2017

Heliyon

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“…During this reaction process, the hydrazine hydrate could product gases such as NH 3 and N 2 , 6 which was beneficial to form a porous structure of the materials. When CoCl 2 was added into the GO suspension, the Co 2+ could react with the oxygen group on GO by the electrostatic attraction and be anchored on the GO sheets.…”

Section: Resultsmentioning

confidence: 99%

One-step synthesis of a cobalt sulfide/reduced graphene oxide composite used as an electrode material for supercapacitors

2015

RSC Adv.

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A simple, one-step approach has been developed to prepare a composite of cobalt sulfide/reduced graphene oxide (CoS/rGO) by using sodium thiosulfate as a sulfur source. The reduction of GO and the growth of CoS occurred simultaneously, forming a hybrid structure with CoS anchoring on rGO surface. The prepared CoS/rGO composite was applied as an electrode material and found to exhibit a high specific capacitance and rate capability, such as 550 F/g and 400 F/g at a current density of 1 A/g and 40 A/g respectively as well as excellent cyclic stability for 5000 cycles of 2 charge-discharge. The CoS/rGO composite could be a promising electrode material for a high performance supercapacitor. 3 improve the performances of each component but also create the new functions owning to the synergic effect originated from recombination. Recently, much effort has been put into the development of metal sulfides-based graphene composites [1,[20][21][22][23][24][25][26], in which the synthesis of the composite is usually multi-step and high-cost. In this study, a cobalt sulfides/reduced graphene oxide (CoS/rGO) composite has been synthesized via a simple, one-step hydrothermal method by using Na 2 S 2 O 3 as a sulfur source and hydrazine hydrate as a reductant. The electrochemical tests suggested that the obtained composite exhibited a high rate capability and good cycling stability as used for an electrode of a supercapacitor. Experimental Preparation of GOGO was prepared from graphite powder by a modified Hummers method [27].Specifically, 6 g of graphite was added into 40 mL of concentrated H 2 SO 4 , followed by adding 5 g of K 2 S 2 O 8 and 5 g of P 2 O 5 . The mixture was heated to 80 ℃ and maintained for 24 h. It was then diluted with 250 mL of distilled (DI) water. The product was filtered, washed with DI water for several times, and dried. The obtained pre-oxidized graphite was put into 150 mL of concentrated H 2 SO 4 with mechanical stirring, and to which, at the same time, 30 g of KMnO 4 powder was slowly added under ice-bath. After being stirred at 35 ℃ for 24 h, the products were transferred into 200 mL of distilled water, then to which 10 mL of 30 % H 2 O 2 was added drop by drop. The obtained GO suspension was centrifuged. The precipitate was washed with 1 L of a 1:10 HCl solution, and then dialyzed for a week to remove acids and ions. Synthesis of CoS/rGO composite80 mg of the as-prepared GO was dispersed into 70 mL of DI water under ultrasound for 4 h to form a uniform dispersion. Then, 1 mmol of CoCl 2 ·6H 2 O was added into the above dispersion under stirring, followed by adding 0.5 mmol of Na 2 S 2 O 3 ·5H 2 O. After stirred for 0.5 h, the mixture was added with 2 mL of hydrazine hydrate, transferred into a 100 mL of Teflon-lined autoclave and then heated at 180℃for 12 h. The produced CoS/rGO was centrifuged, washed with DI water and ethanol each for several times and dried in a vacuum oven at 60 ℃. CoS was also prepared by using the same method without GO as a comparison. Material CharacterizationsX-ray diffra...

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“…Co 9 S 8 , which is a member of the pentlandite family, with good thermal stability and relatively high room‐temperature conductivity of 290 S cm −1 , has great potential to serve as a sulfur host for Li–S batteries . Nazar and co‐workers prepared graphene‐like Co 9 S 8 with high surface area and hierarchical porosity .…”

Section: Metal Sulfides As Sulfur Hosts For Li–s Batteriesmentioning

confidence: 99%

Novel Non‐Carbon Sulfur Hosts Based on Strong Chemisorption for Lithium–Sulfur Batteries

Zhu

Wang

Miao

et al. 2018

Small

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Lithium-sulfur (Li-S) batteries are considered as promising candidates for energy storage systems owing to their high theoretical capacity and high energy density. The application of Li-S batteries is hindered by several obstacles, however, including the shuttle effect, poor electrical conductivity, and the severe volume expansion of sulfur. The traditional method is to integrate sulfur with carbon materials. But the interaction between polysulfide intermediates and carbon is only weak physical adsorption, which easily leads to the escape of species from the framework (shuttle effect) of the material causing capacity loss. Recently, however, there has been a trend for the introduction of novel non-carbon materials as sulfur hosts based on the strong chemisorption. This review highlights recent research progress on novel non-carbon sulfur hosts based on strong chemisorption, in Li-S batteries. In comparison with carbon-based sulfur hosts, most non-carbon sulfur hosts have been demonstrated to be polar host materials that could efficiently adsorb polysulfide via strong chemisorption, mitigating their dissolution. The intrinsic mechanism associated with the role of non-carbon-based host materials in improving the performance of Li-S batteries is discussed.

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D-tracer study of butadiene hydrogenation and tetrahydrothiophen hydrodesulphurisation catalysed by Co9S8

Cited by 42 publications

References 23 publications

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

One-step synthesis of a cobalt sulfide/reduced graphene oxide composite used as an electrode material for supercapacitors

Novel Non‐Carbon Sulfur Hosts Based on Strong Chemisorption for Lithium–Sulfur Batteries

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