Catalytic effect of (H₂O)_n (n = 1–3) on the HO₂ + NH₂ → NH₃ + ³O₂ reaction under tropospheric conditions

Abstract

The catalytic effect of (H2O)n (n = 1−3) on the HO2 + NH2 → NH3 + 3O2 is mainly taken from the contribution of a single water vapor.

Effect of NH3 and HCOOH on the H2O2 + HO → HO2 + H2O reaction in the troposphere: competition between the one-step and stepwise mechanisms

“…2(b). When binary complex H 2 O 2 /NH 3 and HO play as reactants, the reaction occurs in stepwise route, which is similar to H 2 O catalyzed reactions 21,28,62,73,74 of HO 2 + HO, HO 2 + HS, H 2 O 2 + HO, HO 2 + Cl, and HO 2 + NH 2 , as well as NH 3 -catalyzed HO 2 + Cl reaction. 28 The rst step begins with pre-reactive complex IM_AM2, which transforms into seven-membered ring complex IM_AM3 through transition state TS_AM2 by a ring enlargement.…”

Effect of (H2O)n (n = 0–3, 13) on the NH3 + OH reaction in the gas and liquid phases

“…In the aqueous environment, water clusters with different sizes and conformations have a great probability of participating in the reaction. The processes for the formation of NH 3 + OH + (H 2 O) n → NH 2 + H 2 O + (H 2 O) n are divided into three main steps: 22,37,38 where A represents the reactant NH 3 or OH, B represents (H 2 O) n ( n = 1–3), C represents a bimolecular complex, and k 1 and k −1 are the forward and reverse rate constants, respectively, in step a. D represents another reactant, E represents the precursor complex, and k 2 and k −2 are the corresponding forward and reverse rate constants, respectively, in step b.…”

“…For this type of reaction, the total rate constant calculation for the involvement of water clusters can be written as: 22,37 k = K eq1 × K eq2 × k TS where K eq1 is the equilibrium constant between reactants and biomolecular complexes, K eq2 is the equilibrium constant between biomolecular complexes and trimolecular complexes, and k TS is the reaction rate of the decisive speed step. 39,40…”

“…In the aqueous environment, water clusters with different sizes and conformations have a great probability of participating in the reaction. The processes for the formation of NH 3 + OH + (H 2 O) n / NH 2 + H 2 O + (H 2 O) n are divided into three main steps: 22,37,38 Step a…”

“…For this type of reaction, the total rate constant calculation for the involvement of water clusters can be written as: 22,37 The ash photolysis/laser-induced uorescence technique was used to study the rate in 273-433 K Ref. 17 The rate constants in the range of 293-473 K were studied by pulse radiolysis method in liquid phase Ref.…”