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7704-34-9Relevant articles and documents
Steele, B. D.,Bagster, L. S.
, p. 2607 (1910)
EFFECT OF PREADSORBED SULFUR ON NITRIC OXIDE REDUCTION ON POROUS PLATINUM BLACK ELECTRODES.
Foral,Langer
, p. 257 - 263 (1988)
Sulfur can be deposited on porous platinum black gas diffusion cathodes to influence the course of the electrogenerative reduction of nitric oxide. Polarization (performance) curves and reactor selectivity data are compared for untreated cathodes and thos
Donath, E.
, p. 141 - 143 (1901)
Kinetic regularities of recovery of metals from raw materials of industrial origin
Velikanova,Semchenko,Khentov
, p. 1470 - 1475 (2011)
Kinetics of recovery of metals from the wastes and poor ores, which contain oxide and sulfide minerals of copper, vanadium, and silver with an azomethine solution in organic solvent was studied. The optimal parameters of the recovery were suggested.
The Dissociation Rate of S2 Produced from COS Pyrolysis
Higashihara, Tetsuo,Saito, Ko,Murakami, Ichiro
, p. 15 - 18 (1980)
The disappearance rate of S2, which was produced from the pyrolysis of COS, was measured behind incident shock waves by monitoring the UV emission in the temperature range of 4500-6000 K and in the pressure range of 0.32-0.5 atm.It was found that two proc
Infrared studies of the adsorption and surface reactions of hydrogen sulfide and sulfur dioxide on some aluminas and zeolites
Deo,Lana, I.G.Dalla,Habgood
, p. 270 - 281 (1971)
Adsorption of hydrogen sulfide, sulfur dioxide, and their mixtures on four different catalysts has been studied by infrared spectroscopy of the catalyst surfaces. The four catalysts, which show a wide range of acidity and are all active for the Claus reaction (2H2S + SO2 → 3S + 2H2O), were γ-alumina (the main constituent of commercial bauxite catalysts), γ-alumina doped with NaOH, sodium Y zeolite, and hydrogen Y zeolite. All catalysts showed physical adsorption of both reactants with strong hydrogen bonding to surface OH groups. This would suggest that the role of the catalyst is primarily to bring the reactants together in suitable orientation. On the other hand, γ-alumina shows, on heating with SO2, a chemisorbed SO2 species which may be a reaction intermediate. The NaOH-treated γ-alumina shows a second chemisorbed SO2 species which is irreversibly adsorbed and thus may be a catalyst poison.
Wright, L. T.
, p. 156 - 156 (1883)
Matthews, E.
, (1926)
Dunnicliff, H. B.,Nijhawan, S. D.
, (1926)
Use of cobalt(II) phthalocyanine sulfonates in gas purification to remove hydrogen sulfide
Faddeenkova,Kundo
, p. 1946 - 1950 (2003)
Experiments on liquid-phase oxidation of H2S with oxygen in the presence of catalysts, cobalt phthalocyanine sulfonates [CoPc(SO 3Na)n], were performed on a laboratory static installation in order to find conditions under which a stationary oxidation mode can be established at pH ≥ 8. The influence exerted by additional introduction of a soluble salt of Mn2+ (MnSO4, MnCl2) into the reaction mixture at various pH values was studied.
Carter, S. R.,Butler, J. A. V.
, p. 2370 - 2370 (1923)
Carter, S. R.,Butler, J. A. V.
, p. 2380 - 2380 (1923)
Wardlaw, W.,Carter, S. R.,Clews, F. H.
, p. 1241 - 1241 (1920)
Sato, Tetsuya,Kinugawa, Tohru,Arikwawa, Tatsuo,Kawasaki, Masahiro
, p. 173 - 182 (1992)
Corrosion mechanism of nickel in hot, concentrated H2SO4
Kish,Ives,Rodda
, p. 3637 - 3646 (2000)
Electrochemical techniques, complemented by weight change and ex situ X-ray spectroscopic measurements, were employed to characterize the corrosion of nickel in concentrated H2SO4 solutions. By use of a rotating cylinder electrode, it was found that corrosion is a mass-transport controlled process with the convective diffusion of nickel cations from a saturated NiSO4 layer as its rate-determining step. The oxidizing nature of the acid solution leads to the formation of additional corrosion products including metastable NiS, and elemental sulfur along with NiSO4, none of which is protective. When present on the surface, NiS establishes a galvanic interaction with the uncovered metal, significantly polarizing the anodic metal dissolution reaction. Since corrosion is mass-transport controlled, the resultant corrosion rate of the metal is unaffected during the galvanic-induced polarization.
The synthesis and characterization of Pb5S2I6 whiskers and tubules
Yang, Qing,Tang, Kaibin,Wang, Chunrui,Zuo, Jian,Qian, Yitai
, p. 670 - 674 (2003)
Pb5S2I6 whiskers and tubules were synthesized from the reaction among lead chloride, thiourea, and excess sodium iodide under hydrothermal conditions at 200 °C for 20-40 h. XRD, SEM, XPS, ICP-AES, and TEM characterized the final products. Most products are whiskers with structure of 3-4 mm in length, 0.5-2.0 μm in diameter for a singular one. Meanwhile, about 10% tubules are produced in the process. The tubules are 3-6 mm in length, 8-20 μm in diameter, and 1-3 μm in thickness. Nanowhiskers were also produced in the route at 180-200 °C for 8-10 h. Raman spectra show that the Pb5S2I6 crystals have complex vibrational modes of PbS and PbI2.
Iwasawa, Y.,Ogasawara, S.
, p. 132 - 142 (1977)
A facile in situ sulfur deposition route to obtain carbon-wrapped sulfur composite cathodes for lithium-sulfur batteries
Su, Yu-Sheng,Manthiram, Arumugam
, p. 272 - 278 (2012)
An in situ sulfur deposition route has been developed for synthesizing sulfur-carbon composites as cathode materials for lithium-sulfur batteries. This facile synthesis method involves the precipitation of elemental sulfur at the interspaces between carbon nanoparticles in aqueous solution at room temperature. The product has been characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, charge-discharge measurements, and electrochemical impedance spectroscopy. The sulfur-carbon composite cathode with 75 wt.% active material thus obtained exhibits a remarkably high first discharge capacity of 1116 mAh g-1 with good cycle performance, maintaining 777 mAh g-1 after 50 cycles. The significantly improved electrochemical performance of the sulfur-carbon composite cathode is attributed to the carbon-wrapped sulfur network structure, which suppresses the loss of active material during charging/discharging and the migration of the polysulfide ions to the anode (i.e., shuttling effect). The integrity of the cathode structure during cycling is reflected in low impedance values observed after cycling. This facile in situ sulfur deposition route represents a low-cost approach to obtain high-performance sulfur-carbon composite cathodes for rechargeable Li-S batteries.
Thermodynamics of copper sulfides. II. Heat capacity and thermodynamic properties of synthetic covellite, CuS, from 5 to 780.5 K. Enthalpy of decomposition
Westrum, Edgar F.,Stoelen, Svein,Groenvold, Fredrik
, p. 1199 - 1208 (1987)
The heat capacity of CuS has been measured by adiabatic shield calorimetry from 5 to 840 K.The heat capacity increases regularly up to about 750 K and then more strongly as the decomposition temperature (780.5 K) of covellite into high-digenite and sulfur is approached.The molar enthalpy and molar entropy of decomposition are 2149.3R*K and 2.755R.Above 780.5 K the uptake of sulfur in the high-digenite causes a further rise in the heat capacity.The low-temperature values increase more strongly than expected from the Debye relation with a Debye temperature estimated from the intermediate-temperature behavior.This phenomenon as well as a small bump in the heat capacity around 55 K are discussed.The resulting molar enthalpy and molar entropy at 298.15 and 825 K are 1136.6R*K, 8.101R, and 6744.2R*K, 17.393R, respectively.
A Novel Reaction of Metal Sulphides with the Mixed Non-aqueous System Dimethyl Sulphoxide-Sulphur Dioxide
Harrison, W. David,Gill, J. Bernard,Goodall, David C.
, p. 728 - 729 (1988)
Several synthetic and naturally occuring metal sulphides react with the system dimethyl sulphoxide-sulphur dioxide to give metal hydrogen sulphates or sulphates, in contrast with the reaction of sulphides with aqueous sulphur dioxide, which yields mainly thiosulphate.
Bellissent, R.,Descotes, L.,Boue, F.
, (1990)
Gibbs, W.
, p. 387 - 402 (1864)
Murthy, A. R. V.
, p. 388 - 401 (1952)
Structural determination of the S-passivated InP(100)-(1x1) surface by dynamical low-energy electron-diffraction analysis
Warren, O. L.,Anderson, G. W.,Hanf, M. C.,Griffiths, K.,Norton, P. R.
, (1995)
We have determined the optimum geometry of the S-passivated InP(100)-(1x1) surface by dynamical low-energy electron-diffraction analysis. S atoms bond to In by occupying the bridge site that continues the zinc-blendestacking sequence of the substrate. Oth
Skrabal
, p. 107 - 107 (1924)
In Situ Modulation of A-Site Vacancies in LaMnO3.15 Perovskite for Surface Lattice Oxygen Activation and Boosted Redox Reactions
Chen, Jianjun,Ding, Yun,He, Minghua,Li, Junhua,Liu, Haiyan,Liu, Jun,Liu, Xiaoqing,Liu, Yuefeng,Mi, Jinxing,Shi, Jianqiang,Shi, Lin,Wang, Zisha,Wu, Zhong-Shuai,Xiong, Shangchao,Zhang, Qinfang
supporting information, p. 26747 - 26754 (2021/11/17)
Modulation of A-site defects is crucial to the redox reactions on ABO3 perovskites for both clean air application and electrochemical energy storage. Herein we report a scalable one-pot strategy for in situ regulation of La vacancies (VLa) in LaMnO3.15 by simply introducing urea in the traditional citrate process, and further reveal the fundamental relationship between VLa creation and surface lattice oxygen (Olatt) activation. The underlying mechanism is shortened Mn?O bonds, decreased orbital ordering, promoted MnO6 bending vibration and weakened Jahn–Teller distortion, ultimately realizing enhanced Mn-3d and O-2p orbital hybridization. The LaMnO3.15 with optimized VLa exhibits order of magnitude increase in toluene oxidation and ca. 0.05 V versus RHE (reversible hydrogen electrode) increase of half-wave potential in oxygen reduction reaction (ORR). The reported strategy can benefit the development of novel defect-meditated perovskites in both heterocatalysis and electrocatalysis.
Synergistic effect of Bi-doped exfoliated MoS2 nanosheets on their bactericidal and dye degradation potential
Qumar,Ikram,Imran,Haider,Ul-Hamid,Haider,Riaz,Ali
, p. 5362 - 5377 (2020/05/08)
Nanosheets incorporated with biological reducing agents are widely used to minimize the toxic effects of chemicals. Biologically amalgamated metal oxide nanomaterials have crucial importance in nanotechnology. In this study, bare and bismuth (Bi)-doped molybdenum disulfide (MoS2) nanosheets were synthesized via a hydrothermal method. Different Bi weight ratios of 2.5, 5, 7.5 and 10% were incorporated in a fixed amount of MoS2 to evaluate its catalytic and antimicrobial activities. Doped nanosheets were characterized using XRD, FTIR and UV-vis spectroscopy, FESEM, HRTEM, Raman, PL, DSC/TGA, EDX, XRF and XPS analysis. The XRD spectra confirmed that the doped nanosheets exhibit a hexagonal structure and their crystallite size increases gradually upon doping. The morphology and interlayer d-spacing of doped MoS2 were determined by FESEM and HRTEM. The presence of functional groups in the doped nanosheets was confirmed using FTIR, PL and Raman analysis. The absorption intensity increased and the corresponding measured band gap energy decreased with doping. The thermal stability and weight loss behaviour of the prepared samples were studied using DSC/TGA. The doped MoS2 nanosheets showed a higher catalytic potential compared to undoped MoS2. The doped Bi nanosheets exhibited higher antimicrobial activity against Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) at different concentrations of Bi (0.075 and 0.1), showing a tendency to counter the emerging drug resistance against pathogenic bacterial diseases. Consequently, significant inhibition zones were recorded against (MDR) S. aureus ranging from 2.25 to 3.3 mm and 3.25 to 5.05 mm at low and high concentrations of doped-Bi nanosheets and against Gram-negative E. coli ranging from 1 to 1.45 mm at high concentrations. In conclusion, the Bi-doped MoS2 nanocomposite has exhibited significant potential for use in industrial dye degradation applications. Its antibacterial properties can also mitigate health risks associated with the presence of several well-known pathogens in the environment.
Physicochemical studies on the desulfurization process of organosulfur compounds occur in crude oil by metallo-complexation method
Alhadhrami,Al-Ghamry, Mosad A.,Atta, Aly H.,El-Shenawy, Ahmed I.,Refat, Moamen S.,Al-Omar, Mohamed A.,Naglah, Ahmed M.
, p. 94 - 97 (2017/02/13)
All over the world researchers in accelerating to development the new and modern methods of desulfurization process to overcome the presence of residual sulfur compounds in the crude oil, which has harmful effects and undesirable. Out of these important r