The meaning of HYDROGEN BOND is an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as of oxygen, nitrogen, or fluorine) in usually another molecule of the same or a different polar su
The intensive use of fossil energy causes global warming. Hydrogen fuel cell is a technology that transforms the chemical energy stored in hydrogen directly into electricity with high efficiency, and its only emission is water. It acts as one of the practical and promising solutions to realize a ...
The heat of dimer formation at 41{degree}C obtained from this data, {Delta}H{sub D} = {minus}13.8 {plus minus} 1.2 kJ/mol, is used to calculate the equilibrium hydrogen bond dissociation energy, D{sub e} = 21.8 {plus minus} 1.7 kJ/mol. These results are compared with recent ab ...
Therefore, the Gibbs free energy change of a reaction can be calculated by enthalpy change and entropy change. The Gibbs free energy change in? the hydrogen-oxygen reaction with liquid water as the product (as Eq. 1.1) under the standard condition can be calculated as: (1.11)dGr0=dHr0−...
hydrogen bond是什么意思 释义 氢键; hydrogen bond英英释义 noun an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as of oxygen, nitrogen, or fluorine) in usually another molecule of the same or a different polar substance ...
Oxygen AdditionsNitrogen AdditionsThe temperature dependency of the phosphorescence properties of aromatic hydrocarbons (phenanthrene) in alcoholic glasses exhibits a number of phenomena that have not been previously described. Chief among these are the effects of added gases (O sub 2 , N sub 2 , C...
et al. In situ Raman spectroscopic evidence for oxygen reduction reaction intermediates at platinum single-crystal surfaces. Nat. Energy 4, 60–67 (2019). Article CAS Google Scholar Strasser, P. et al. Lattice-strain control of the activity in dealloyed core–shell fuel cell catalysts. Nat....
Hydrogen bond Some covalently bonded hydrides have a hydrogen atom bound simultaneously to two separate electronegative atoms, which are then said to be hydrogen bonded. The strongest hydrogen bonds involve the small, highly electronegative atoms of fluorine (F), oxygen, and nitrogen. In the bifluori...
resulting in the optimal OOH* adsorption energy; (2) Ni and B can be favor in oxidizing Co0 to Co3+, which is beneficial to persistently provide a catalytic active center for oxygen evolution reaction; (3) the B, N codoped carbon layer can effectively reduce the damage of strong alkali...