CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Fabrication of NiSe2 by direct selenylation of a nickel surface
Sun, HL; Liang, ZF; Shen, KC; Luo, M; Hu, JB; Huang, H; Zhu, ZY; Li, ZJ; Jiang, Z; Song, F
AbstractThe emergence of transition metal dichalcogenides (TMD) as an exciting class of materials with appealing potentials in electronic and optoelectronics has drawn intensive attention in the past few years. Herein, we report the fabrication of NiSe2, which has been predicted to be a promising candidate in the field of electrocatalyst, by direct selenylation of the nickel substrate after epitaxial growth of selenium on a nickel foil. With a combination of photoelectron spectroscopy (PES), X-ray diffraction (XRD), scanning electron microscopy (SEM) and density function theory (DFT) calculations, it is possible to identify the phase transition among the previously reported stable Ni-Se phases and the ultimate formation of NiSe2 species by external annealing at varying temperatures. While SEM reveals the morphology of NiSe2 film with flat terraces, XRD, XPS and DFT calculations demonstrate that NiSe2 is the relatively stable phase formed on the Ni substrate from the cohesive energy point of view. Furthermore, valence band spectra point out the nonmetallic level of these different Ni-Se compounds, agreeing well with literature reports. In the end, our report may indicate a feasible approach to synthesize the pure NiSe2 species under solution-free condition and an encouraging step forward towards non-noble electrocatalysts. (C) 2017 Elsevier B.V. All rights reserved.
KeywordTransition-metal-dichalcogenide Sensitized Solar-cells Solid-state Synthesis Hydrothermal Synthesis Electronic-structure Nanowire Film Thin-films Efficient Electrocatalyst Growth
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WOS IDWOS:000415227000078
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Document Type期刊论文
Affiliation1.Sun, HL
2.Liang, ZF
3.Shen, KC
4.Luo, M
5.Hu, JB
6.Huang, H
7.Zhu, ZY
8.Li, ZJ
9.Jiang, Z
10.Song, F
Recommended Citation
GB/T 7714
Sun, HL,Liang, ZF,Shen, KC,et al. Fabrication of NiSe2 by direct selenylation of a nickel surface[J]. APPLIED SURFACE SCIENCE,2018,428:623-629.
APA Sun, HL.,Liang, ZF.,Shen, KC.,Luo, M.,Hu, JB.,...&Song, F.(2018).Fabrication of NiSe2 by direct selenylation of a nickel surface.APPLIED SURFACE SCIENCE,428,623-629.
MLA Sun, HL,et al."Fabrication of NiSe2 by direct selenylation of a nickel surface".APPLIED SURFACE SCIENCE 428(2018):623-629.
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