Lattice Distortion of Crystalline-amorphous nickel molybdenum sulfide nanosheets for high-efficiency overall water splitting: lone pair electrons’ libraries and in-suit surface reconstitution

Nanoscale ◽  
2022 ◽  
Author(s):  
Zhikai Shi ◽  
Zebin Yu ◽  
Juan Guo ◽  
Ronghua Jiang ◽  
Yanping Hou ◽  
...  
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Lattice Distortion ◽  
High Efficiency ◽  
Lone Pair ◽  
Molybdenum Sulfide ◽  
Two Dimensional ◽  
Metal Materials ◽  
In Suit ◽  
Lone Pair Electrons

Lattice distortion is an important way to improve the electrocatalytic performance and stability of two-dimensional transition metal materials (2d-TMSs). Herein, a lattice distortion nickel-molybdenum sulfide electrocatalyst on foam nickel (NiMoS4-12/NF)...

Fe and Cu dual-doped Ni3S4 nanoarray with less low-valence Ni species for boosting water oxidation reaction

2022 ◽  
Author(s):  
Xiaoqiang Du ◽  
Jiaxin Li ◽  
Xiaoshuang Zhang
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
High Efficiency ◽  
Ni Foam ◽  
Metal Materials ◽  
Ni Species ◽  
Co Doped

Transition metal materials with high efficiency and durable electrocatalytic water splitting activity have aroused widespread concern among scientists. In this work, two cation co-doped Ni3S4 nanoarrays grown on Ni foam...

Fabrication and Surface Engineering of Two-Dimensional SnS Toward Piezoelectric Nanogenerator Application

MRS Advances ◽  
2018 ◽  
Vol 3 (45-46) ◽  
pp. 2809-2814 ◽  
Author(s):  
Naoki Higashitarumizu ◽  
Hayami Kawamoto ◽  
Keiji Ueno ◽  
Kosuke Nagashio
Keyword(s):  
Thermal Stability ◽  
Surface Morphology ◽  
Oxide Layer ◽  
Chemical Treatment ◽  
Surface Engineering ◽  
Lone Pair ◽  
Covalent Bonding ◽  
Two Dimensional ◽  
Lone Pair Electrons ◽  
Thermal Stability Of

ABSTRACTMechanical exfoliation is performed to fabricate ultrathin SnS layers, and chemical/thermal stability of SnS layers is discussed in comparison with GeS, toward piezoelectric nanogenerator application. Both SnS and GeS are difficult to be exfoliated under 10 nm using tape exfoliation due to strong interlayer ionic bonding by lone pair electrons in Sn or Ge atoms. Au-mediated exfoliation enables to fabricate larger-scale ultrathin SnS and GeS layers thinner than 10 nm owing to strong semi-covalent bonding between Au and S atoms, but GeS surface immediately degrades during Au etching in an oxidative KI/I2 solution. Although the surface of SnS after the Au-mediated exfoliation reveals several-nm oxide layer of SnOx, the surface morphology retains the flatness unlike the case of GeS. The SnS layers are more robust than GeS against the thermal annealing as well as the chemical treatment, suggesting that SnOx works as a passivation layer for SnS. Self-passivated SnS monolayer can be obtained by a controlled post-oxidation.

Two-dimensional transition-metal halide CoBr3 with spin-polarized Dirac cone

2019 ◽  
Vol 21 (32) ◽  
pp. 17740-17745 ◽  
Author(s):  
Wei-xi Zhang ◽  
Yong Li ◽  
Hui Jin ◽  
Yan-chao She
Keyword(s):  
Transition Metal ◽  
Electronic Properties ◽  
Metal Halide ◽  
Two Dimensional ◽  
Dirac Cone ◽  
Spin Polarized ◽  
Metal Materials

Recently, the discovery of two-dimensional transition-metal materials with non-trivial magnetic and electronic properties has spurred huge interest in investigating their applications in nanotechnology.

scholarly journals Bond-length distributions for ions bonded to oxygen: metalloids and post-transition metals

2018 ◽  
Vol 74 (1) ◽  
pp. 63-78 ◽  
Author(s):  
Olivier Charles Gagné ◽  
Frank Christopher Hawthorne
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Bond Length ◽  
Coordination Number ◽  
Lone Pair ◽  
Transition Metal Ions ◽  
Length Variation ◽  
Coordination Polyhedra ◽  
Bond Lengths ◽  
Lone Pair Electrons

Bond-length distributions have been examined for 33 configurations of the metalloid ions and 56 configurations of the post-transition metal ions bonded to oxygen, for 5279 coordination polyhedra and 21 761 bond distances for the metalloid ions, and 1821 coordination polyhedra and 10 723 bond distances for the post-transition metal ions. For the metalloid and post-transition elements with lone-pair electrons, the more common oxidation state between n versus n+2 is n for Sn, Te, Tl, Pb and Bi and n+2 for As and Sb. There is no correlation between bond-valence sum and coordination number for cations with stereoactive lone-pair electrons when including secondary bonds, and both intermediate states of lone-pair stereoactivity and inert lone pairs may occur for any coordination number > [4]. Variations in mean bond length are ∼0.06–0.09 Å for strongly bonded oxyanions of metalloid and post-transition metal ions, and ∼0.1–0.3 Å for ions showing lone-pair stereoactivity. Bond-length distortion is confirmed to be a leading cause of variation in mean bond lengths for ions with stereoactive lone-pair electrons. For strongly bonded cations (i.e. oxyanions), the causes of mean bond-length variation are unclear; the most plausible cause of mean bond-length variation for these ions is the effect of structure type, i.e. stress resulting from the inability of a structure to adopt its characteristic a priori bond lengths.

Two-dimensional transition metal dichalcogenide nanomaterials for solar water splitting

2015 ◽  
Vol 11 (3) ◽  
pp. 323-335 ◽  
Author(s):  
Dinsefa M. Andoshe ◽  
Jong-Myeong Jeon ◽  
Soo Young Kim ◽  
Ho Won Jang
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Solar Water ◽  
Solar Water Splitting

scholarly journals Strategies for Developing Transition Metal Phosphides in Electrochemical Water Splitting

2021 ◽  
Vol 9 ◽  
Author(s):  
Jie Ying ◽  
Huan Wang
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
High Efficiency ◽  
Molar Ratio ◽  
Renewable Energy Resources ◽  
Design Strategies ◽  
Metal Phosphides ◽  
High Efficient ◽  
Electrochemical Water Splitting ◽  
Transition Metal Phosphides

Electrochemical water splitting involving hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a greatly promising technology to generate sustainable and renewable energy resources, which relies on the exploration regarding the design of electrocatalysts with high efficiency, high stability, and low cost. Transition metal phosphides (TMPs), as nonprecious metallic electrocatalysts, have been extensively investigated and proved to be high-efficient electrocatalysts in both HER and OER. In this minireview, a general overview of recent progress in developing high-performance TMP electrocatalysts for electrochemical water splitting has been presented. Design strategies including composition engineering by element doping, hybridization, and tuning the molar ratio, structure engineering by porous structures, nanoarray structures, and amorphous structures, and surface/interface engineering by tuning surface wetting states, facet control, and novel substrate are summarized. Key scientific problems and prospective research directions are also briefly discussed.

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