Topic
Reaction rate constant
About: Reaction rate constant is a research topic. Over the lifetime, 42919 publications have been published within this topic receiving 1047932 citations. The topic is also known as: reaction rate coefficient.
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10,842 citations
TL;DR: In this article, the rate constants for over 3500 reaction are tabulated, including reaction with molecules, ions and other radicals derived from inorganic and organic solutes, and the corresponding radical anions, ⋅O− and eaq−, have been critically pulse radiolysis, flash photolysis and other methods.
Abstract: Kinetic data for the radicals H⋅ and ⋅OH in aqueous solution,and the corresponding radical anions, ⋅O− and eaq−, have been critically pulse radiolysis, flash photolysis and other methods. Rate constants for over 3500 reaction are tabulated, including reaction with molecules, ions and other radicals derived from inorganic and organic solutes.
9,887 citations
TL;DR: In this paper, the stability of reaction intermediates of electrochemical processes on the basis of electronic structure calculations was analyzed and a detailed description of the free energy landscape of the electrochemical oxygen reduction reaction over Pt(111) as a function of applied bias was presented.
Abstract: We present a method for calculating the stability of reaction intermediates of electrochemical processes on the basis of electronic structure calculations. We used that method in combination with detailed density functional calculations to develop a detailed description of the free-energy landscape of the electrochemical oxygen reduction reaction over Pt(111) as a function of applied bias. This allowed us to identify the origin of the overpotential found for this reaction. Adsorbed oxygen and hydroxyl are found to be very stable intermediates at potentials close to equilibrium, and the calculated rate constant for the activated proton/electron transfer to adsorbed oxygen or hydroxyl can account quantitatively for the observed kinetics. On the basis of a database of calculated oxygen and hydroxyl adsorption energies, the trends in the oxygen reduction rate for a large number of different transition and noble metals can be accounted for. Alternative reaction mechanisms involving proton/electron transfer to ...
7,711 citations
TL;DR: In this article, the equation of the linear potential sweep voltammogram is derived for any degree of reversibility of the electrochemical reaction for the following methods: surface voltammetry when both the oxidized and the reduced forms are strongly adsorbed, and a Langmuir isotherm is obeyed, thin layer voltamometry, and linear potential sweeping coulometry.
5,920 citations
TL;DR: In this article, a review of electron transfer reactions is presented, focusing on the absence of bond rupture in the reaction step, which is a unique feature of purely electron-transfer reactions.
Abstract: One of the active areas in reaction kinetics during the post-war years has
been that of electron-transfer reactions. These reactions constitute one type
of oxidation-reduction process and include both chemical and electrochemical
systems. Many rate constants have now been measured (1-8) and
they have stimulated a variety of theoretical studies (9-37). The field has
been characterized by a strong interplay of theory and experiment, which
now includes the testing of theoretically predicted quantitative correlations
(34). Because of a certain unique feature of the purely electron-transfer
reactions--the absence of bond rupture in the reaction step--these correlations
are unusual. They do not have the arbitrary parameters that occur
in theoretical studies of most other reactions in chemical kinetics. This review
will be limited to purely electron transfer reactions.
3,738 citations