Nitrogen is one of a number of elements that show covalent bonding and molecular shapes that are not explained by their valence shell electron configuration. In this case, nitrogen being in Group 5 on the periodic table can make three bonds, but they would not be oriented correctly to explain...
In chemistry, a covalent bond is a chemical bond in which the outer shell electrons of the constituent atoms are shared between them when the molecule is formed. One example of a common molecule that has covalently bonded atoms is water....
The weak hydrogen-binding ability of MGEs and abundant valence electrons are less favorable for competing H2 evolution, rendering more ideal active sites for N2 adsorption and reduction.33,34 Solvation and steric effects arising from alkali cations (e.g., Li+)35,36 and electrode engineering with...
ground-state K-S energy that comprises all the interaction terms including the Hartree energy, the external interaction energy between the nucleus and electrons, and the exchange-correlation energy. Thus, the computed value QTAIM can be viewed as the overall K-S energy difference between the otwf...
respectively. These electrons and holes are collected at the cathode and anode, respectively and generates a voltage. TheJscof 39.72 mA/cm2,Vocof 0.66 V,FFof 69.82%, andPCEof 18.31% are obtained. TheJscof the device depends upon the absorption coefficient, thickness and mobility of the activ...
Also, it can be assumed that μnτn > > μpτp for free electrons and holes since the distributions of electronic defects present in the bandgap energy range of perovskite materials are asymmetrical and besides electronic defects close to the valence band edge have a higher concentration. For...
(increased surface Brønsted and Lewis acidity sites) play an important role for the catalyst's activity For acid pre-treatment of cordierite, which enlarged the BET surface area and pore volume of the catalysts significantly; SiO2 shifted the V valence from V5+ to V4+ and increased ...
In addition to the above high-valence MILs, alkali metal ions, especially lithium (Li), have also been introduced into PILs to increase NH3absorption performance. Shang et al. [41] prepared novel sorbents that simultaneously incorporate acidic protons into cations and Li+ions into anions. The so...
The weak hydrogen-binding ability of MGEs and abundant valence electrons are less favorable for competing H2 evolution, rendering more ideal active sites for N2 adsorption and reduction.33,34 Solvation and steric effects arising from alkali cations (e.g., Li+)35,36...
They also proposed that the difficulty of N-H bond activation of NH3 is due to the relatively large N-H bond energy and the relative activity of the lone pair of electrons on the N atom. However, these mechanistic point of views focused on reactions of organic synthesis. Piers et al. [...