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  1. Article ; Online: Ternary Chalcogenides GeSb

    Chen, Guan-Ruei / Li, Chien-He / Yu, Ching-Yi / Wang, Ming-Fang / Lee, Chi-Shen

    Inorganic chemistry

    2020  Volume 59, Issue 16, Page(s) 11207–11212

    Abstract: Ternary chalcogenides, ... ...

    Abstract Ternary chalcogenides, GeSb
    Language English
    Publishing date 2020-07-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.0c00515
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Ba3TM2Se9 (TM = Nb, Ta): synthesis and characterization of new polyselenides.

    Chung, Ming-Yan / Lee, Chi-Shen

    Inorganic chemistry

    2014  Volume 53, Issue 1, Page(s) 80–84

    Abstract: New ternary polyselenides Ba3TM2Se9 (TM = Nb, Ta) were synthesized through a solid-state reaction, and their structures were characterized using single-crystal X-ray diffraction. These compounds crystallized into a new structural type with a monoclinic ... ...

    Abstract New ternary polyselenides Ba3TM2Se9 (TM = Nb, Ta) were synthesized through a solid-state reaction, and their structures were characterized using single-crystal X-ray diffraction. These compounds crystallized into a new structural type with a monoclinic space group P21/c. The structures were constructed from distorted, close-packed layers of ∞3[BaSe3]3.33– that incorporated TM atoms at octahedral sites and contained [(TM5+)2(Se2–)7(Se22–)] units. Diffuse reflectance spectra and electronic resistivity measurements indicated semiconducting properties and optical band gaps of 1.3 eV for Ba3Nb2Se9 and 1.6 eV for Ba3Ta2Se9. Raman spectra were used to investigate the interatomic interactions. Calculations of the electronic structure verified the semiconducting behavior and bonding interaction of short Se–Se contacts.
    Language English
    Publishing date 2014-01-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/ic4013763
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Multinary selenides with unusual coordination environment of bismuth.

    Chung, Ming-Yan / Lee, Chi-Shen

    Inorganic chemistry

    2012  Volume 51, Issue 24, Page(s) 13328–13333

    Abstract: New multinary selenides Ae3SnPn2Se8 (Ae = Sr, Ba; Pn = Sb, Bi), Sr8.01Ge2.04Bi7.95Se24, and Sr8YGe2Bi7Se24 were synthesized by solid-state reaction, and their structures were determined by single-crystal X-ray diffraction. These compounds crystallize in ... ...

    Abstract New multinary selenides Ae3SnPn2Se8 (Ae = Sr, Ba; Pn = Sb, Bi), Sr8.01Ge2.04Bi7.95Se24, and Sr8YGe2Bi7Se24 were synthesized by solid-state reaction, and their structures were determined by single-crystal X-ray diffraction. These compounds crystallize in orthorhombic space group Pnma (no. 62) for Ae3SnPn2Se8 (Ae = Sr, Ba; Pn = Sb, Bi) and in Pna21 (no. 33) for Sr8.01Ge2.04Bi7.95Se24 and Sr8YGe2Bi7Se24. The structures feature one-dimensional corner sharing tetrahedral (∞)(1)[MSe3] units, and one-dimensional edge sharing octahedral ∞1[M4Se10], packed with the alkaline earth or rare earth cations. Sr8.01Ge2.04Bi7.95Se24 and Sr8YGe2Bi7Se24 contain a triple cell superlattice structure derived from a special arrangement of Bi and Ge in the tetrahedrally coordinated ∞1[MSe3] chain. Diffuse reflectance spectra and electronic resistivity measurements indicate semiconducting behaviors; the Sr8YGe2Bi7Se24 Seebeck coefficient is −180 μV/K at 303 K. Electronic structure calculations confirm that the electron count for Sr8YGe2Bi7Se24 is optimal for interatomic bonding in the ionic network.
    Language English
    Publishing date 2012-12-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/ic302027b
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  4. Article ; Online: Oxidative steam reforming of ethanol over M

    Hsieh, Ho-Chen / Tsai, Ping-Wen / Chang, Yuan-Chia / Weng, Sheng-Feng / Sheu, Hwo-Shuenn / Chuang, Yu-Chun / Lee, Chi-Shen

    RSC advances

    2019  Volume 9, Issue 68, Page(s) 39932–39944

    Abstract: Alkaline earth metal substitutions on the A-site of pyrochlore oxide ... ...

    Abstract Alkaline earth metal substitutions on the A-site of pyrochlore oxide M
    Language English
    Publishing date 2019-12-05
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/c9ra08385e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: A quaternary germanium(II) phosphate, Na[Ge(4)(PO(4))(3)].

    Lee, Chi-Shen / Weng, Sheng-Feng

    Acta crystallographica. Section E, Structure reports online

    2008  Volume 64, Issue Pt 3, Page(s) i17

    Abstract: A new germanium(II) phosphate, sodium tetra-germanium tris-(phosphate), Na[Ge(4)(PO(4))(3)], has been synthesized by a solid-state reaction. The compound is isotypic with A[Sn(4)(PO(4))(3)] (A = Na, K, NH(4)). It features a [Ge(4)(PO(4))(3)](-) framework ...

    Abstract A new germanium(II) phosphate, sodium tetra-germanium tris-(phosphate), Na[Ge(4)(PO(4))(3)], has been synthesized by a solid-state reaction. The compound is isotypic with A[Sn(4)(PO(4))(3)] (A = Na, K, NH(4)). It features a [Ge(4)(PO(4))(3)](-) framework made up of GeO(3) pyramids and PO(4) tetra-hedra, which are linked by shared corners, yielding a three-dimensional structure. The crystal studied showed partial inversion twinning.
    Language English
    Publishing date 2008-02-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2041947-8
    ISSN 1600-5368
    ISSN 1600-5368
    DOI 10.1107/S1600536808003231
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Oxidative steam reforming of ethanol over MₓLa₂₋ₓCe₁.₈Ru₀.₂O₇₋δ (M = Mg, Ca) catalysts: effect of alkaline earth metal substitution and support on stability and activity

    Hsieh, Ho-Chen / Tsai, Ping-Wen / Chang, Yuan-Chia / Weng, Sheng-Feng / Sheu, Hwo-Shuenn / Chuang, Yu-Chun / Lee, Chi-Shen

    RSC advances. 2019 Dec. 05, v. 9, no. 68

    2019  

    Abstract: Alkaline earth metal substitutions on the A-site of pyrochlore oxide MₓLa₂₋ₓCe₁.₈Ru₀.₂O₇₋δ (M = Mg, Ca) were studied as catalyst materials for oxidative/autothermal steam reforming of ethanol (OSRE/ATR). The as-prepared oxides were synthesized by a ... ...

    Abstract Alkaline earth metal substitutions on the A-site of pyrochlore oxide MₓLa₂₋ₓCe₁.₈Ru₀.₂O₇₋δ (M = Mg, Ca) were studied as catalyst materials for oxidative/autothermal steam reforming of ethanol (OSRE/ATR). The as-prepared oxides were synthesized by a combustion method and characterized using powder X-ray diffraction (PXRD), and X-ray photoelectron and absorption spectroscopy (XPS and XAS). PXRD Rietveld analysis and elemental analysis (ICP-AES) support the formation of a pyrochlore-type structure (space group Fd3̄m) with a distorted coordination environment. The substitution of Mg²⁺ and Ca²⁺ ions affects the oxidation states of Ce⁴⁺/³⁺ and Ruⁿ⁺ ions and creates oxygen vacancies, which leads to enhanced catalytic activity and reduced ethylene selectivity. A long-term stability test showed optimized catalysts Mg₀.₃La₁.₇Ce₁.₈Ru₀.₂O₇₋δ and Ca₀.₂La₁.₈Ce₁.₈Ru₀.₂O₇₋δ with SH₂ = 101(1)% and SH₂ = 91(2)% under OSRE conditions. The initial operation temperatures were lower than that of the unsubstituted catalyst La₂Ce₁.₈Ru₀.₂O₇₋δ. Catalysts supported on La₂Zr₂O₇ showed stable OSRE/ATR performance and low carbon deposition compared to catalysts supported on Al₂O₃. We ascribe the enhanced activity to well-dispersed alkaline earth metal and Ru ions in a solid solution structure, synergistic effects of (Mg, Ca)²⁺/Ce³⁺/⁴⁺/Ruⁿ⁺ ions, and a strong catalyst–support interaction that optimized the ethanol conversion and hydrogen production.
    Keywords X-ray absorption spectroscopy ; X-ray diffraction ; X-ray photoelectron spectroscopy ; aluminum oxide ; calcium ; carbon ; catalysts ; catalytic activity ; cerium ; combustion ; ethanol ; ethylene ; hydrogen production ; ions ; magnesium ; oxygen ; steam ; temperature
    Language English
    Dates of publication 2019-1205
    Size p. 39932-39944.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c9ra08385e
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Synthesis and thermal decomposition of Zn(tda)H2O [tda = S(CH(2)COO)2(2-)].

    Wu, Ming-Cheng / Lee, Chi-Shen

    Inorganic chemistry

    2006  Volume 45, Issue 24, Page(s) 9634–9636

    Abstract: A novel two-dimensional coordination polymer Zn(tda)H2O [tda = S(CH(2)COO)2(2-)] was synthesized under hydrothermal conditions. The compound crystallized in monoclinic space group P2(1) with a = 16.4154(17) A, b = 5.2133(6) A, c = 16.4210(17) A, beta = ... ...

    Abstract A novel two-dimensional coordination polymer Zn(tda)H2O [tda = S(CH(2)COO)2(2-)] was synthesized under hydrothermal conditions. The compound crystallized in monoclinic space group P2(1) with a = 16.4154(17) A, b = 5.2133(6) A, c = 16.4210(17) A, beta = 114.165(2) degrees , V = 1282.1(2) A3, and Z = 8. The structure features two-dimensional, noncentrosymmetric networks with a pseudohexagonal network of Zn2+ coordinated by tda and water molecules. Zn(tda)H2O decomposed at T > 300 degrees C to form a ZnO sponge with a surface area approximately 40 m2/g, which makes it an attractive precursor for nanoporous ZnO.
    Language English
    Publishing date 2006-11-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/ic061531c
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  8. Article: Effect of the transition metal on the synthesis of quaternary sulfides MPb8In17S34 (M = Cu, Ag, Au).

    Wang, Kuan-Chen / Lee, Chi-Shen

    Inorganic chemistry

    2006  Volume 45, Issue 4, Page(s) 1415–1417

    Abstract: Quaternary sulfides MPb8In17S34 (M = Cu, Ag, Au) were synthesized at 1123 K from their elements in stoichiometric ratios. These compounds crystallize in monoclinic space group P2(1)/m. The crystal structures feature combinations of 2[InS2] (NaCl111-type) ...

    Abstract Quaternary sulfides MPb8In17S34 (M = Cu, Ag, Au) were synthesized at 1123 K from their elements in stoichiometric ratios. These compounds crystallize in monoclinic space group P2(1)/m. The crystal structures feature combinations of 2[InS2] (NaCl111-type) and [MPb2In3S6] (NaCl100-type) slabs. These compounds are semiconductors with band gaps near 1.3 eV.
    Language English
    Publishing date 2006-02-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/ic051447h
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  9. Article ; Online: Synthesis and phase width of quaternary selenides Pb4In(x)M(6-x)Se13 (M = Bi, x = 2.1-2.8; Sb, x = 2).

    Wang, Ming-Fang / Huang, Wen-Hen / Lee, Chi-Shen

    Inorganic chemistry

    2009  Volume 48, Issue 14, Page(s) 6402–6408

    Abstract: Quaternary selenides of Pb(4)In(x)M(6-x)Se(13) (M = Bi, x = 2.1-2.8; Sb, x = 2) were synthesized by solid-state methods, and their structures were determined from X-ray diffraction of single crystals. These compounds are isostructural with Pb(4)In(2)Bi(4) ...

    Abstract Quaternary selenides of Pb(4)In(x)M(6-x)Se(13) (M = Bi, x = 2.1-2.8; Sb, x = 2) were synthesized by solid-state methods, and their structures were determined from X-ray diffraction of single crystals. These compounds are isostructural with Pb(4)In(2)Bi(4)S(13) and crystallize in orthorhombic space group Pbam (No. 55) with Z = 4; the structure features a three-dimensional framework consisting of Z-shaped ribbon units and corner-sharing infinite one-dimensional [InSe(4)](infinity) chains running parallel to the c-axis, which are connected by Pb atoms to form a three-dimensional structure. Calculations of the band structure and measurements of Seebeck coefficient, electrical conductivity, and diffuse reflectance spectra confirm that these compounds are semiconductors with a narrow band gap. All compounds show semiconducting properties; the Seebeck coefficient of Pb(4)In(2.5)Bi(3.5)Se(13) is -180 microV/K at 295 K.
    Language English
    Publishing date 2009-07-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/ic8023875
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Li(10)Mg(6)Zn(31)Al(3): A New Intermetallic Phase Containing Building Blocks for Decagonal Quasicrystals The Ames Laboratory is operated for the U.S. Department of Energy (US DOE) by Iowa State University under contract No. W-7405-ENG-82. This work was supported by the Office of Basic Energy Sciences, Materials Chemistry Division of the US DOE. The Bruker CCD-1000 diffractometer was purchased by a grant from the U.S. National Science Foundation, NSF 97-11121.

    Lee, Chi-Shen / Miller, Gordon J.

    Angewandte Chemie (International ed. in English)

    2001  Volume 40, Issue 24, Page(s) 4740–4742

    Language English
    Publishing date 2001-12-17
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/1521-3773(20011217)40:24<4740::aid-anie4740>3.0.co;2-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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