scholarly journals Review of strategies towards the development of alloy two-dimensional (2D) transitional metal di-chalcogenides

iScience ◽  
2021 ◽  
pp. 103532
Author(s):  
Appu Kumar Singh ◽  
Partha Kumbhakar ◽  
Aravind Krishnamoorthy ◽  
Aiichiro Nakano ◽  
Kishor Kumar Sadasivuni ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Transitional Metal

Two-dimensional transitional metal dihydride crystals with anisotropic and spin-polarized Fermi Dirac cones

2018 ◽  
Vol 6 (42) ◽  
pp. 11243-11247 ◽  
Author(s):  
Haifeng Lv ◽  
Daoxiong Wu ◽  
Xiuling Li ◽  
Xiaojun Wu ◽  
Jinlong Yang
Keyword(s):  
First Principles ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Transitional Metal ◽  
Spin Polarized

Four new 2D MH2 crystals with anisotropic and spin-polarized Fermi–Dirac cones are reported by using first-principles calculations.

scholarly journals Two-dimensional molybdenum carbide 2D-Mo2C as a superior catalyst for CO2 hydrogenation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Hui Zhou ◽  
Zixuan Chen ◽  
Evgenia Kountoupi ◽  
Athanasia Tsoukalou ◽  
Paula M. Abdala ◽  
...  
Keyword(s):  
Molybdenum Carbide ◽  
Surface Coverage ◽  
Co2 Hydrogenation ◽  
Two Dimensional ◽  
Product Selectivity ◽  
Metal Carbides ◽  
Surface Termination ◽  
Transitional Metal ◽  
Pretreatment Conditions ◽  
Hydrogenation Of Co

AbstractEarly transitional metal carbides are promising catalysts for hydrogenation of CO2. Here, a two-dimensional (2D) multilayered 2D-Mo2C material is prepared from Mo2CTx of the MXene family. Surface termination groups Tx (O, OH, and F) are reductively de-functionalized in Mo2CTx (500 °C, pure H2) avoiding the formation of a 3D carbide structure. CO2 hydrogenation studies show that the activity and product selectivity (CO, CH4, C2–C5 alkanes, methanol, and dimethyl ether) of Mo2CTx and 2D-Mo2C are controlled by the surface coverage of Tx groups that are tunable by the H2 pretreatment conditions. 2D-Mo2C contains no Tx groups and outperforms Mo2CTx, β-Mo2C, or the industrial Cu-ZnO-Al2O3 catalyst in CO2 hydrogenation (evaluated by CO weight time yield at 430 °C and 1 bar). We show that the lack of surface termination groups drives the selectivity and activity of Mo-terminated carbidic surfaces in CO2 hydrogenation.

Two-dimensional transitional metal disulfides as charge transport layers in organic-inorganic perovskite solar cells.

2020 ◽  
Vol 14 ◽  
Author(s):  
Huanhuan Zheng ◽  
Bingqiang Niu ◽  
Yijin Wang ◽  
Hafiz Muhammad Asif Javed ◽  
Peng Zhong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Perovskite Solar Cells ◽  
Morphological Structure ◽  
Two Dimensional ◽  
Large Area ◽  
Inorganic Perovskite ◽  
The Past ◽  
Transitional Metal ◽  
Low Costs

: In the past decade, organic-inorganic perovskite solar cells (PSCs) have received great attentions due to their high efficiencies and low costs. However, the commercialization of PSCs is stilled hindered by several issues such as device performance (especially for large-area cells) and stability. Recently, two-dimensional (2D) transition metal disulfides (TMDs) show great potentials in solving aforementioned problems due to their unique morphological structure and electrical properties. Herein, we summarize the advancements in the recent applications of various TMDs materials as charge transport layers in PSCs. Although some progresses have been made, there are considerable issues to be tackled in this field. The challenges and development directions of these 2D TMDs materials for PSCs are also clarified. Lastly, the most recent advancements about TMDs materials in some other electronic (or optoelectronic) fields are also summarized and discussed.

scholarly journals Pressure evolution of the potential barriers of phase transition of MoS2, MoSe2 and MoTe2

2016 ◽  
Vol 18 (17) ◽  
pp. 12080-12085 ◽  
Author(s):  
Xaiofeng Fan ◽  
David J. Singh ◽  
Q. Jiang ◽  
W. T. Zheng
Keyword(s):  
Phase Transition ◽  
Two Dimensional ◽  
Potential Barriers ◽  
Weak Layer ◽  
Transitional Metal ◽  
Metal Dichalcogenides ◽  
Pressure Evolution

Two-dimensional crystals with weak layer interactions, such as transitional metal dichalcogenides, have been a focus of research recently.

Optoelectronic Artificial Synapses Based on Two-Dimensional Transitional-Metal Trichalcogenide

2021 ◽  
Author(s):  
Lei Liu ◽  
Ziqiang Cheng ◽  
Bei Jiang ◽  
Yanxin Liu ◽  
Yanli Zhang ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Transitional Metal

scholarly journals Two Dimensional Transitional Metal Dichalcogenides for Biomedical Applications

2015 ◽  
Vol 73 (9) ◽  
pp. 902 ◽  
Author(s):  
Teng Liu ◽  
Liang Cheng ◽  
Zhuang Liu
Keyword(s):  
Biomedical Applications ◽  
Two Dimensional ◽  
Transitional Metal ◽  
Metal Dichalcogenides

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

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