12038-63-0Relevant academic research and scientific papers
The formation of ReS2 inorganic fullerene-like structures containing Re4 parallelogram units and metal-metal bonds
Coleman, Karl S.,Sloan, Jeremy,Hanson, Neal A.,Brown, Gareth,Clancy, Gerald P.,Terrones, Mauricio,Terrones, Humberto,Green, Malcolm L. H.
, p. 11580 - 11581 (2002)
The encapsulation of ReOx within ReS2 inorganic fullerene-like cages is described for the first time. The encapsulate was prepared by the sulfidization of both hand-milled and ball-milled samples of ReO2; partial conversio
Electronic structure of ReS2 and ReSe2 from first-principles calculations, photoelectron spectroscopy, and electrolyte electroreflectance
Ho,Huang,Chen,Dann,Tiong
, p. 15766 - 15771 (1999)
The electronic structures of ReS2 and ReSe2 single crystals are investigated using a first-principles density-of-states (DOS) calculation, ultraviolet photoelectron spectroscopy (UPS), and electrolyte electroreflectance (EER). The total and partial DOS were calculated by the full-potential linearized-augmented-plane-wave method. From the calculations, the main contribution near the band edge of Re X2 (X=S,Se) is determined to be dominated by the nonbonding Re d orbitals. The valence-band DOS is experimentally verified by the UPS measurements. EER measurements were performed in the energy range of 1.3-6 eV. The EER spectra exhibit sharp derivativelike structures in the vicinity of the band-edge excitonic transitions as well as higher-lying interband transitions. Transition energies are determined accurately. From the experimental and the theoretically calculated results, probable energy-band structures of ReS2 and ReSe2 are constructed. 1999 The American Physical Society.
Synthesis and Characterization of ReS2 and ReSe2 Layered Chalcogenide Single Crystals
Jariwala, Bhakti,Voiry, Damien,Jindal, Apoorv,Chalke, Bhagyashree A.,Bapat, Rudheer,Thamizhavel, Arumugam,Chhowalla, Manish,Deshmukh, Mandar,Bhattacharya, Arnab
, p. 3352 - 3359 (2016)
We report the synthesis of high-quality single crystals of ReS2 and ReSe2 transition metal dichalcogenides using a modified Bridgman method that avoids the use of a halogen transport agent. Comprehensive structural characterization using X-ray diffraction and electron microscopy confirm a distorted triclinic 1T′ structure for both crystals and reveal a lack of Bernal stacking in ReS2. Photoluminescence (PL) measurements on ReS2 show a layer-independent bandgap of 1.51 eV, with increased PL intensity from thicker flakes, confirming interlayer coupling to be negligible in this material. For ReSe2, the bandgap is weakly layer-dependent and decreases from 1.31 eV for thin layers to 1.29 eV in thick flakes. Both chalcogenides show feature-rich Raman spectra whose excitation energy dependence was studied. The lower background doping inherent to our crystal growth process results in high field-effect mobility values of 79 and 0.8 cm2/(V s) for ReS2 and ReSe2, respectively, as extracted from FET structures fabricated from exfoliated flakes. Our work shows ReX2 chalcogenides to be promising 2D materials candidates, especially for optoelectronic devices, without the requirement of having monolayer thin flakes to achieve a direct bandgap.
Electrodeposition of thin Re-Se films
Salakhova
, p. 99 - 102 (2003)
Re, Se, and Re-Se electrodeposition from alkaline electrolytes was studied. The effects of process variables were examined, and the nature of polarization in the course of rhenium and selenium deposition from alkaline electrolytes was assessed. Re-Se elec
Construction of heterojunctions between ReS2and twin crystal ZnxCd1?xS for boosting solar hydrogen evolution
Guo, Luyan,Yu, Guiyang,Zhao, Haitao,Xing, Chuanwang,Hu, Yujia,Chen, Ting,Li, Xiyou
, p. 5137 - 5145 (2021)
Facilitating charge separation as well as surface redox reactions is considered to be an efficient way to improve semiconductor-based photocatalytic hydrogen generation. In this study, we developed a highly active and reliable photocatalyst, ReS2/T-ZCS, by anchoring nanoflower-like ReS2particles on the surface of host chalcogenide nanotwins (Zn0.5Cd0.5S). By virtue of the in-built driving force from the homojunction with a type-II staggered band alignment in twin crystal Zn0.5Cd0.5S (T-ZCS) and heterojunctions between T-ZCS and ReS2on the surface of the photocatalyst, a substantially improved charge separation and transfer property were achieved. Hence, the twin crystal Zn0.5Cd0.5S decorated nanoflower-like ReS2exhibits a significantly improved photocatalytic H2evolution rate of 112.10 mmol g?1h?1and the corresponding apparent quantum efficiency reaches 32.65% at 420 nm, which is 31 times larger than that of pure phase Zn0.5Cd0.5S. Our work not only couples the merits of homojunctions and heterojunctions to promote solar energy conversion, but also expands applications of the transition metal dichalcogenide (TMD) family in electrocatalysis, photothermal-catalysis and energy storage.
[Re12CS17(CN)6]n- (n = 6, 8): A sulfido-cyanide rhenium cluster with an interstitial carbon atom
Mironov, Yuri V.,Naumov, Nikolai G.,Kozlova, Svetlana G.,Kim, Sung-Jin,Fedorov, Vladimir E.
, p. 6867 - 6871 (2005)
Cyanide clusters [Re12CS17(CN)6] n- (n = 8 or 6), which may be used to form polymeric material, have been prepared by treating ReS2 with molten KCN at 750°C. The cluster unit comprises two {Re6} octahedra connected by three μ2-S bridges and one interstitial μ6-C atom (see picture). (Figure Presented).
Rhenium(IV) sulfide nanotubes
Brorson, Michael,Hansen, Thomas W.,Jacobsen, Claus J. H.
, p. 11582 - 11583 (2002)
Rhenium(IV) sulfide, ReS2, has been prepared with nanotubular morphology by carbon nanotube templating. A multiwall carbon nanotube material was impregnated with solutions of NH4ReO4 or ReCl5, followed by drying and sulfidation with H2S at 1000 °C. The composite material synthesized was characterized by high-resolution transmission electron microscopy and X-ray powder diffraction. Like previously described MS2 nanotube compounds, ReS2 has a layered structure consisting of S-M-S layers. Re atoms in ordinary ReS2 are octahedrally coordinated with S, and tetranuclear metal clusters are present as a consequence of metal-metal bonds. Copyright
Preparation of 1T′-Phase ReS2 xSe2(1- x) (x = 0-1) Nanodots for Highly Efficient Electrocatalytic Hydrogen Evolution Reaction
Lai, Zhuangchai,Chaturvedi, Apoorva,Wang, Yun,Tran, Thu Ha,Liu, Xiaozhi,Tan, Chaoliang,Luo, Zhimin,Chen, Bo,Huang, Ying,Nam, Gwang-Hyeon,Zhang, Zhicheng,Chen, Ye,Hu, Zhaoning,Li, Bing,Xi, Shibo,Zhang, Qinghua,Zong, Yun,Gu, Lin,Kloc, Christian,Du, Yonghua,Zhang, Hua
, p. 8563 - 8568 (2018)
As a source of clean energy, a reliable hydrogen evolution reaction (HER) requires robust and highly efficient catalysts. Here, by combining chemical vapor transport and Li-intercalation, we have prepared a series of 1T′-phase ReS2xSe2(1-x) (x = 0-1) nanodots to achieve high-performance HER in acid medium. Among them, the 1T′-phase ReSSe nanodot exhibits the highest hydrogen evolution activity, with a Tafel slope of 50.1 mV dec-1 and a low overpotential of 84 mV at current density of 10 mA cm-2. The excellent hydrogen evolution activity is attributed to the optimal hydrogen absorption energy of the active site induced by the asymmetric S vacancy in the highly asymmetric 1T′ crystal structure.
Absorption-edge anisotropy in ReS2 and ReSe2 layered semiconductors
Ho,Huang,Tiong,Liao
, p. 16130 - 16135 (1998)
Polarization-dependent absorption measurements of ReS2 and ReSe2 single crystals have been carried out in the temperature range between 25 and 500 K. A significant shift towards lower energies has been observed in the transmittance spectra of E∥b polarization with respect to those corresponding to E⊥ b polarization. Analysis reveals that the absorption edges of ReS2 and ReSe2 are indirect allowed transitions. The parameters that describe the temperature dependence of the absorption edges with different polarizations in the van der Waals plane are evaluated. The results indicate that the electron-phonon coupling constants for E∥b polarization are considerably larger than those of E⊥ b polarization.
Kinetic characterization of unsupported ReS2 as hydroprocessing catalyst
Ho,Shen,McConnachie,Kliewer
, p. 114 - 122 (2010)
The hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) activities of an unsupported rhenium sulfide and a sulfided CoMo/Al2O 3-SiO2 catalyst are compared using 4,6- diethyldibenzothiophene (46DEDBT) and 3-ethylcarbazole (3ECBZ) as probe molecules. The active site densities and adsorption-reaction rate constants are determined from transient experiments. It is found that ReS2 has an unusually high selectivity toward hydrogenation. As such, it has a far higher activity than CoMo/Al2O3-SiO2 for desulfurizing 46DEDBT in the absence of 3ECBZ. The higher activity of ReS2 arises from a higher turnover frequency as the active site density on ReS2 is about one-third that on CoMo/Al2O3-SiO2. Due to ReS2's higher hydrogenation power, the HDS of 46DEDBT on ReS 2 is less resilient to 3ECBZ inhibition than that on CoMo/Al 2O3-SiO2. ReS2 shows about a sevenfold activity advantage over the CoMo/Al2O3-SiO 2 catalyst in the hydrodenitrogenation of 3ECBZ. The results shed some light on the HDS-HDN interactions in real-feed deep HDS.
