T:Toxic;
7446-09-5Relevant articles and documents
SO(B-X) Bands. Tests of the Effects of SO Decay Energy Transfer from O2(1Δg) on Measured SO Absorption Cross Sections in the O + CS2 Recation System
Whyte, A. R.,Phillips, L. F.
, p. 4327 - 4330 (1982)
SO is generated by reacting CS2 vapor with excess of O atoms.Decay of SO in the presence of excess O results in essentially quantitative formation of SO2.Hence, the average in the absorption cell is given by the difference between measured SO2 concentrations in the cell with and without addition of NO2 upstream, and no correction for SO decay is required.Cross sections measured by using O atoms from the reaction of N with NO are in good agreement with those obtained by using O atoms for discharged O2/He mixtures, which shows that formation of SO(1Δ) by energy transfer of O2(1Δg) is not a significant source of error in these measurements.
Pt-core silica shell nanostructure: a robust catalyst for the highly corrosive sulfuric acid decomposition reaction in sulfur iodine cycle to produce hydrogen
Khan, Hassnain Abbas,Jung, Kwang-Deog,Ahamad, Tansir,Ubaidullah, Mohd,Imran, Muhammad,Alshehri, Saad M.
, p. 1247 - 1252 (2021/02/03)
The platinum core silica shell catalyst has facilitated stable sulfuric acid decomposition at higherature which was not possible over bare Pt nanoparticles due to sintering and agglomeration. Helium (He) gas supplies the heat (550-900 °C) in a high temperature gas cooled reactor (VHTR). The major challenge is designing a stable catalyst for the variable heat efficiency of He. Pt catalysts loaded on different supports, such as SiC, Al2O3, SiC-Al2O3, BaSO4, TiO2, SBA-15, and SiO2, have been extensively studied but they have not provided a simple method to form robust catalysts for sulfuric acid decomposition. The core-shell scheme, whereby nanoparticles are enclosed by protecting agents (CTAB) and are covered by a silica shell, delivered mesopores and exhibited higher activity and stability over testing for more than 100 h. TEM images confirmed that the Pt particles on the Pt@mSiO2 catalyst are more stable during sulfuric acid decomposition, and no significant evidence of agglomeration or sintering of the Pt core particles was found, despite some broken shells and dislocated Pt nanoparticles from the silica core. ICP-OES analysis of the spent catalysts after 100 h showed minimal Pt loss (9.0%). These types of catalysts are highly desirable for practical applications. This journal is
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.
Oxidation of Sulfur Dioxide in Sodium and Calcium Fluorides
Ivanova, M. S.,Savitskaya, Yu. V.,Tomskii, K. O.,Vishnetskaya, M. V.
, p. 513 - 517 (2021/08/23)
Abstract: It was established that the oxidation reactions of sulfur dioxide occur in aqueous solutions of sodium fluoride and in suspensions of calcium fluoride at room temperature and atmospheric pressure. It was found that the solutions of NaF and CaFs
The tin sulfates Sn(SO4)2and Sn2(SO4)3: Crystal structures, optical and thermal properties
Daub, Michael,H?mmer, Matthias,H?ppe, Henning A.,Hillebrecht, Harald,Klenner, Steffen,Netzsch, Philip,Neuschulz, Kai,P?ttgen, Rainer,Struckmann, Mona,Wickleder, Mathias S.
, p. 12913 - 12922 (2021/10/12)
We report the crystal structures of two tin(iv) sulfate polymorphs Sn(SO4)2-I (P21/c (no. 14), a = 504.34(3), b = 1065.43(6), c = 1065.47(6) pm, β = 91.991(2)°, 4617 independent reflections, 104 refined parameters, wR2 = 0.096) and Sn(SO4)2-II (P21/n (no. 14), a = 753.90(3), b = 802.39(3), c = 914.47(3) pm, β = 92.496(2)°, 3970 independent reflections, 101 refined parameters, wR2 = 0.033). Moreover, the first heterovalent tin sulfate Sn2(SO4)3 is reported which adopts space group P1 (no. 2) (a = 483.78(9), b = 809.9(2), c = 1210.7(2) pm, α = 89.007(7)°, β = 86.381(7)°, γ = 73.344(7)°, 1602 independent reflections, 152 refined parameters, wR2 = 0.059). Finally, SnSO4-the only tin sulfate with known crystal structure-was revised and information complemented. The optical and thermal properties of all tin sulfates are investigated by FTIR, UV-vis, luminescence and 119Sn M?ssbauer spectroscopy as well as thermogravimetry and compared.
Metal- And Base-Free C(sp2)-H Arylsulfonylation of Enamides for Synthesis of (E)-β-Amidovinyl Sulfones via the Insertion of Sulfur Dioxide
Chen, Lei,Zhou, Mi,Shen, Lin,He, Xiaochun,Li, Xiong,Zhang, Xuemei,Lian, Zhong
supporting information, p. 4991 - 4996 (2021/06/30)
A metal- and base-free C(sp2)-H direct arylsulfonylation of secondary and tertiary enamides with aryldiazonium salts and ex situ generated SO2 (from SOgen) is presented. This method runs smoothly to produce β-amidovinyl sulfones with excellent stereoselectivities in moderate to excellent yields. Moreover, this strategy features good functional group tolerance and environmentally benign reaction conditions. Mechanistic experiments indicate that this sulfonylation may proceed in a radical pathway.
Copper-Catalyzed Chloro-Arylsulfonylation of Styrene Derivatives via the Insertion of Sulfur Dioxide
Li, Yue,Shen, Lin,Zhou, Mi,Xiong, Baojian,Zhang, Xuemei,Lian, Zhong
supporting information, p. 5880 - 5884 (2021/08/01)
A copper-catalyzed four-component chloro-arylsulfonylation of styrene derivatives with aryldiazonium tetrafluoroborates, lithium chloride, and ex-situ generated sulfur dioxide (from SOgen) is presented. This sulfonylation features good functional group compatibility, mild reaction conditions, excellent regioselectivity, and good yields. The robustness and potential of this method have also been successfully demonstrated by a gram-scale reaction. Based on experimental study, a radical-involved mechanism is proposed for the transformation.
Defect enriched N-doped carbon nanoflakes as robust carbocatalysts for H2S selective oxidation
Cao, Ning,Chen, Congmei,Gu, Qingqing,Jiang, Chengfa,Jiang, Qian,Li, Shiyan,Liu, Yuefeng,Pham-Huu, Cuong,Xu, Chi
, p. 8892 - 8902 (2020/06/10)
Nanocarbons have emerged as low-cost, efficient and durable nonmetallic catalysts for H2S selective oxidation. However, the most efficient active sites for H2S activation remain elusive, which restricts further development of high-pe
Efficient and Practical Synthesis of Sulfonamides Utilizing SO2 Gas Generated on Demand
Chung Leung, Gulice Yiu,Ramalingam, Balamurugan,Loh, Gabriel,Chen, Anqi
, p. 546 - 554 (2020/04/22)
A simple and practical protocol was developed for the synthesis of sulfonamides by reacting organometallic reagents with SO2 gas generated on demand. SO2 was generated from readily available reagents safely in a highly contained and controlled fashion. The protocol allows the synthesis of sulfonamides without using either atom-inefficient SO2 surrogates or a SO2 cylinder that requires stringent storage regulations in the laboratory. The protocol was successfully applied to the synthesis of sildenafil.
Green molten salt synthesis and Li-ion storage performance of sodium dimolybdate
Kamali, Ali Reza,Zhu, Wenhui
, (2020/03/26)
A facile and fast molten salt strategy is developed, for the first time, to synthesis sodium dimolybdate (Na2Mo2O7). The process is based on a thermodynamically favorable reaction between naturally available precursors MoS2 and NaCl to produce Na2Mo2O7 as well as a gas phase that leaves the system. The product is characterized by electron microscopy and energy-dispersive X-ray spectroscopy (EDX) as well as X-ray diffraction (XRD) and Raman spectroscopy. The prepared Na2Mo2O7 in combination with molten salt-synthesized graphene nanosheets is examined as anode material for Li-ion batteries, exhibiting an interesting performance, with the first cycle discharge and charge capacities of 1363 and 857 mAh g?1, respectively, at 100 mA g?1. A reversible Li storage capacity of 506 mAh g?1 can still be observed after 100 cycles. The results are rather interesting towards the development of low-cost and high-performance Na2Mo2O7 anode materials.
