Advances and challenges in metal selenides enabled by nanostructures for electrochemical energy storage applications

Abstract

Developing nanomaterials and their related electrochemical energy storage (EES) devices provide solutions for improving the performance and development of the existing EES systems owing to their high electronic conductivity and...

An alternative approach to selenides and diselenides from Se(0) and epoxides/aziridines under sustainable conditions

“…Pale yellow solid, yield 70% (PE/EtOAc 1:1; mixture of diastereoisomers). Spectroscopic data matched those previously reported 21. 1 H NMR (200 MHz, CDCl3) δ (ppm): 2.30 (s, 12 H), 2.62-2.97 (m, 20 H), 3.80 (s, 12 H), 3.88-4.02 (m, 4 H), 6.62-6.88 (m, 8 H), 6.94 (ap d, J 7.6 Hz, 4 H) ppm.…”

“…3,3'-Selenobis(1-isopropoxypropan-2-ol) (2b).Pale yellow oil, yield 68% (PE/EtOAc 3:1, Rf = 0.74; mixture of diastereoisomers). Spectroscopic data matched those previously reported 21. 1 H NMR (400 MHz, CDCl3) δ (ppm): 1.15 (d, J 6.2 Hz, 24 H), 2.70 (dd, J 6.2, 12.8 Hz, 4 H), 2.71 (dd, J 6.8, 12.8 Hz, 4 H), 2.81 (bs, 4H), 3.39-3.44 (m, 4 H), 3.45-3.50 (m, 4 H), 3.53-3.66 (m, 4 H), 3.86-3.93 (m, 4 H).…”

“…[4][5][6][7][8][9] Selenated molecules also represent a class of compounds with various applications in biology, medicine, 10 for example as antioxidants, 11,12 enzyme modulators [13][14][15] and anticancer agents, [16][17][18][19] and in materials chemistry. 20,21 During the course of our studies on chalcogenated systems we reported a convenient methodology to prepare diorganyl selenides and diselenides bearing on a β-position hydroxy, mercapto and amino groups. 22 The synthetic procedure was based on the ring opening of epoxides, thiiranes and aziridines by bis(trimethylsilyl)selenide (HMDSS) under fluoride ion or phenoxide ion 23 catalysis.…”

Fe-Doped Ni/Co-Based Selenide Hierarchical Nanosheet Arrays as Self-Supporting Bifunctional Electrocatalysts for Overall Water Splitting

“…Especially, transition-metal selenides (TMSes) are attracting a lot of attention because of the high conductivity of TMSes and the special electronic structure of the Se atom. 9,10 The unique d-electron configuration of the Se atom can reduce the inherent electrochemical resistance, thus accelerating the electron transfer in the process of HER and OER. 11−13 Furthermore, TMSes have a low hydrogen-bonding energy, which contributes to their catalytic activity for HER.…”

“…Transition-metal-based electrocatalysts are being explored as viable substitutes for noble-metal-based electrocatalysts and have been the focus of extensive research. Especially, transition-metal selenides (TMSes) are attracting a lot of attention because of the high conductivity of TMSes and the special electronic structure of the Se atom. , The unique d-electron configuration of the Se atom can reduce the inherent electrochemical resistance, thus accelerating the electron transfer in the process of HER and OER. − Furthermore, TMSes have a low hydrogen-bonding energy, which contributes to their catalytic activity for HER. Some TMSes have the ability to effectively undergo oxidation and reduction processes on an anode to form an oxide/hydroxide shell, which can further improve the catalytic activity of OER. , For instance, Sahu et al obtained CoSe 2 nanosheets through a facile solvothermal approach.…”