Spectroscopic analysis of Sn doped Se–Te glassy alloy

Heera, Pawan; Sharma, Raman

doi:10.1016/j.jnoncrysol.2016.01.018

Cited by 7 publications

(6 citation statements)

References 40 publications

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“…Bending Raman modes are noticed in the spectral ranges 100-108 and 60-75 cm À1 less than 50 cm À1 for Se-Se, Se-Te and Te-Te bonds, respectively. The noticed Raman bands are consistent with the Raman bands observed in a-Se, a-Te and Se-Te glass 34,50,[57][58][59][60][61][62]. Stretching Se-Se, Se-Te and Te-Te bands in Se x Te 1Àx glasses are observed34,[57][58][59][60][61][62] at 250, 210 and 175 cm À1 , respectively.…”

supporting

confidence: 85%

“…The values given in the table are our results and superscripts a and b on values show that these values are consistent with the values reported in ref. 50 and 34 . The occurrence of Se–Te bands is consistent with their structural arrangement, Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Our results are in agreement with the values reported for a− Se and Se x Te 1− x glasses or films. 50,62 …”

Section: Resultsmentioning

confidence: 99%

“…Our results are in agreement with the values reported for aÀ Se and Se x Te 1Àx glasses or lms. 50,62 It is noticed that even the ground state structures of Se 7 Te 7 and Se 10 Te 10 clusters do not contain any homopolar bond, i.e., Se-Se or Te-Te bond, but Raman and IR spectra show the presence of Se-Se and Te-Te stretching and bending modes. The origin of these modes is the buckling in the ring structures.…”

Section: Raman and Ir Spectramentioning

confidence: 99%

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A DFT study of Se_nTe_nclusters

Sharma

Kanhere

2022

Nanoscale Adv.

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supporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

“…Our results are in agreement with the values reported for a− Se and Se x Te 1− x glasses or films. 50,62 …”

Section: Resultsmentioning

confidence: 99%

Section: Raman and Ir Spectramentioning

confidence: 99%

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A DFT study of Se_nTe_nclusters

Sharma

Kanhere

2022

Nanoscale Adv.

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“…The addition of metallic additives such as Sn in Se-Te matrix may result into a small shift of Fermi level towards one of the band [18] which ultimately modifies the structure of the band and thus electrical, optical and thermo mechanical properties of the system get enhanced [19][20][21][22][23]. Glass forming ability and thermal stability have been reported to increases sufficiently after addition of Bi, Pb and Ag to Se-Te-Sn system [23,26,27].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Some Physico-Chemical Properties in Multi-Component Se–Te–Sn–Sb (0 ≤ x ≤ 6) Quaternary Chalcogenide Glassy System

et al. 2018

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In the present work we report physico-chemical properties in novel Se 78 -x Te 20 Sn 2 Sb x (x = 0, 2, 4 and 6) glassy system prepared by melt quench technique. Various physico-chemical properties such as coordination number, lone pair of electrons, number of constraints, density, molar volume, compactness, mean bond energy, cohesive energy, glass transition temperature and covalence character has been estimated. The compositional dependence of aforesaid physico-chemical properties has been investigated. It has been observed that average number of constraints, mean bond energy, glass transition temperature are found to increase where as number of lone pair of electrons and electro negativity decreases with increases of Sb content in the Se 78 -x Te 20 Sn 2 Sb x (x = 0, 2, 4 and 6) glassy alloys.

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Nanoporous Intermetallic SnTe Enables Efficient Electrochemical CO₂ Reduction into Formate via Promoting the Fracture of Metal–Oxygen Bonding

Yang

Zhao

Meng

et al. 2022

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Among them, Sn has emerged as the benchmark electrocatalyst for CO 2 RR to formate; [15][16][17][18] nevertheless, it only exhibits low selectivity at a specific potential or within a relatively narrow cathodic potential window due to the large energy barrier and sluggish kinetics of the oxygen cutoff hydrogenation and desorption steps by primitive Sn-based catalysts. Therefore, searching and rational designing for potential catalysts with high selectivity is critical to meet commercial CO 2 electroreduction processes.Generally, the rational design of electrochemical CO 2 RR catalysts with moderate bonding strength (not too strong or too weak) to key intermediates is vital to achieve a high selectivity toward desired products. [19] Developing multicomponent alloys is a promising strategy to regulate the surface properties and electronic structure of metal electrocatalysts. [20][21][22][23] The designed alloys can break the scaling relationships of targeted intermediates, leading to the faster reaction kinetics of oxygen cutoff hydrogenation and desorption steps for electrochemical CO 2 reduction into formate. [20,24] Previous tellurium (Te)-based catalysts have been developed for potential small molecules (O 2 and N 2 ) electroreduction, which can tailor the binding strength of reaction intermediates adsorbed on metal active sites to improve electrocatalytic activity. [25][26][27][28][29] The intermetallic tin-tellurium (SnTe) is an attractive electrocatalytic material due to the strong spin-orbit coupling of intermetallic compounds. [30] However, there are still no reliable synthetic methods to control the nanostructured morphology and purity of intermetallic SnTe, while they have not been employed for CO 2 reduction. In addition, the intermetallic compounds possess an ordered arrangement of constituent atoms with precisely determined positions, which endows inherent thermodynamic stability that offers excellent structural robustness under harsh catalytic reaction conditions. [31][32][33] Nevertheless, it will significantly increase the complexity in synthesis and catalytic mechanism involved. Therefore, it is highly desirable to prepare the intermetallic SnTe with specific microstructure and understand how the interactions between Sn and Te atoms affect the catalytic efficiency, selectivity, and stability for CO 2 electroreduction applications.Electrochemical reduction of CO 2 into formate product is considered the most practical significance link in the carbon cycle. Developing cheap and efficient electrocatalysts with high selectivity for formate on a wide operated potential window is desirable yet challenging. Herein, nanoporous ordered intermetallic tin-tellurium (SnTe) is synthesized with a greater reduction performance for electrochemical CO 2 to formate reduction compared to bare Sn. This nanoporous SnTe achieves 93% Faradaic efficiency for formate production and maintains over 90% Faradaic efficiency at a wide voltage range from −1.0 to −1.3 V versus reversible hydrogen electrode (RHE), together with 60...

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Spectroscopic analysis of Sn doped Se–Te glassy alloy

Cited by 7 publications

References 40 publications

A DFT study of Se_nTe_nclusters

A DFT study of Se_nTe_nclusters

Investigation of Some Physico-Chemical Properties in Multi-Component Se–Te–Sn–Sb (0 ≤ x ≤ 6) Quaternary Chalcogenide Glassy System

Nanoporous Intermetallic SnTe Enables Efficient Electrochemical CO₂ Reduction into Formate via Promoting the Fracture of Metal–Oxygen Bonding

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Spectroscopic analysis of Sn doped Se–Te glassy alloy

Cited by 7 publications

References 40 publications

A DFT study of SenTenclusters

A DFT study of SenTenclusters

Investigation of Some Physico-Chemical Properties in Multi-Component Se–Te–Sn–Sb (0 ≤ x ≤ 6) Quaternary Chalcogenide Glassy System

Nanoporous Intermetallic SnTe Enables Efficient Electrochemical CO2 Reduction into Formate via Promoting the Fracture of Metal–Oxygen Bonding

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Product

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A DFT study of Se_nTe_nclusters

A DFT study of Se_nTe_nclusters

Nanoporous Intermetallic SnTe Enables Efficient Electrochemical CO₂ Reduction into Formate via Promoting the Fracture of Metal–Oxygen Bonding