Results 71 to 80 of about 66,822 (374)

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

MgO Modified by X₂, HX, or Alkyl Halide (X = Cl, Br, or I) Catalytic Systems and Their Activity in Chemoselective Transfer Hydrogenation of Acrolein into Allyl Alcohol

Molecules
A new type of catalyst containing magnesium oxide modified with various modifiers ranging from bromine and iodine, to interhalogen compounds, hydrohalogenic acids, and alkyl halides have been prepared using chemical vapor deposition (CVD) and wet ...
Marek Gliński, Urszula Ulkowska, Zbigniew Kaszkur, Dariusz Łomot, Piotr Winiarek   +4 more
doaj   +1 more source

Assessment of Scalar Relativistic Effects on Halogen Bonding and $σ$-Hole Properties [PDF]

arXiv, 2020
Halogen bond (X-bond) is a noncovalent interaction between a halogen atom and an electron donor. It is often rationalized by a region of the positive electrostatic potential on the halogen atom, so-called $\sigma$-hole. The X-bond strength increases with the atomic number of the halogen involved, thus for heavier halogens, relativistic effects become ...
arxiv  

Tailoring topological states in silicene using different halogen-passivated Si(111) substrates [PDF]

Phys. Rev. B 97, 125301 (2018), 2017
We investigate the band structure and topological phases of silicene embedded on halogenated Si(111) surface, by virtue of density functional theory and tight-binding calculations.Our results show that the Dirac character of low energy excitations in silicene is almost preserved in the presence of silicon substrate passivated by various halogens ...
arxiv   +1 more source

Direct Emission of I_2 Molecule and IO Radical from the Heterogeneous Reactions of Gaseous Ozone with Aqueous Potassium Iodide Solution [PDF]

, 2009
Recent studies indicated that gaseous halogens mediate key tropospheric chemical processes. The inclusion of halogen-ozone chemistry in atmospheric box models actually closes the ~50% gap between estimated and measured ozone losses in the marine boundary
Enami, Shinichi, Kawasaki, Masahiro, Sakamoto, Yosuke, Yabushita, Akihiro   +3 more
core   +1 more source

An improved discharge technique for excimer lasers [PDF]

, 1990
The further development of discharge excimer lasers depends upon a better degree of control over the discharge stability. A problem is the large difference between the breakdown and steady-state voltage which requires a time dependent impedance of the ...
Ernst, G.J., Gerritsen, J.W., Keet, A.L., Witteman, W.J.   +3 more
core   +3 more sources

Built‐In Electric Field in 2D/2D LDH/Antimonene Heterostructure to Induce Stable β‐NiOOH at Ultralow Potential for Cost‐Effective Water Electrolysis

Advanced Functional Materials, EarlyView.
In this paper, a built‐in electric field (BEF) strategy is proposed to fabricate NiFe‐LDH/antimonene heterostructure as bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The formed BEF generates a local potential that reduces the potential for the formation of β‐NiOOH, thereby enabling ultra‐low ...
Jingkun Wang, Xiaoning Li, Haojie Liang, Chenxi Zhang, Huayun Du, Ying Sun, Hui Li, Hongge Pan, Yuying Hao, Min Zhao, Tianbao Li, Tianyi Ma   +11 more
wiley   +1 more source

Seasonality of halogen deposition in polar snow and ice [PDF]

Atmospheric Chemistry and Physics, 2014
The atmospheric chemistry of iodine and bromine in Polar regions is of interest due to the key role of halogens in many atmospheric processes, particularly tropospheric ozone destruction. Bromine is emitted from the open ocean but is enriched above first-
A. Spolaor, P. Vallelonga, J. Gabrieli, T. Martma, M. P. Björkman, E. Isaksson, G. Cozzi, C. Turetta, H. A. Kjær, M. A. J. Curran, A. D. Moy, A. Schönhardt, A.-M. Blechschmidt, J. P. Burrows, J. M. C. Plane, C. Barbante   +15 more
doaj   +1 more source

Fluoride‐Free Molten Salt Hydrate‐Assisted Synthesis of MXene in Air Down to 150 °C

Advanced Functional Materials, EarlyView.
A novel low‐temperature shielded salt (LSS) approach enables the synthesis of MXenes in air at temperatures as low as 150 °C using MgCl2·6H2O/LiCl. This method demonstrates successful etching of challenging MXenes like Cr2CTx and Nb2CTx through the synergistic effects of Li+ ions and salt hydrate phase changes, while eliminating the need for inert ...
Sin‐Yi Pang, Weng Fu Io, Lok‐Wing Wong, Xinyue Lao, Qianqian Bai, Kam Lin Chan, Jiong Zhao, Jianhua Hao   +7 more
wiley   +1 more source

Anomalous Fluctuation of Halogens in Relation to the Pollution Status along Lake Mariout, Egypt

Journal of Chemistry, 2020
This paper aimed to study the anomalous fluctuation of halogens with respect to the pollution status in surface water (w), pore water (p), and sediments (s) of Lake Mariout.
Ghada F. El-Said, Gehan M. El Zokm, Abeer A. El Sayed, Ahmed A. El Ashmawy, Mohamed A. Shreadah   +4 more
doaj   +1 more source