A revised model to account for the kinetics of thermodynamically disfavored electron-transfer cross-reactions at the interface between redox polymers and solutions

1993 ◽  
Vol 97 (39) ◽  
pp. 10158-10165 ◽  
Author(s):  
Eyal Sabatani ◽  
Fred C. Anson
Keyword(s):  
Electron Transfer ◽  
Redox Polymers ◽  
Cross Reactions ◽  
Kinetics Of

Kinetics of electron-transfer reactions of the Co(bpyO2)32+/3+ couple in acetonitrile

1992 ◽  
Vol 70 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Donal H. Macartney ◽  
Samuel Mak
Keyword(s):  
Electron Transfer ◽  
Exchange Rate ◽  
Rate Constants ◽  
Marcus Theory ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Cross Reactions ◽  
The Cross ◽  
Polypyridine Complexes ◽  
Kinetics Of

The kinetics of the outer-sphere electron transfer reactions of tris(1,1′-dioxo-2,2′-bipyridine)cobalt(II) and (III) with a series of nickel polyaza macrocycles, FeL3n+ and OsL32+ complexes (L is 2,2′-bipyridine or 1,10-phenanthroline, and substituted derivatives), and Rh2(O2CCH3)4(CH3CN)2+ have been investigated in acetonitrile at 25.0 °C. An application of the Marcus theory relationship to the cross-reaction rate constants yielded apparent Co(bpyO2)32+/3+ self-exchange rate constants of 102 M−1 s−1 from the nickel macrocycle cross-reactions and 10−1 M−1 s−1 from the cross-reactions with the metal polypyridine complexes. The latter cross-reactions are considered to be non-adiabatic due to a mismatch in the donor/acceptor orbital symmetries. The electron exchange rate constant is compared with the exchange rate constants for other Co(II)/Co(III) complex couples and M(bpyO2)32+/3+ couples of other first-row transition metals, and discussed in terms of inner-sphere and solvent reorganization barriers. Keywords: electron transfer, Marcus theory relationship, cobalt(II)/(III) couples, 1,1′-dioxo-2,2′-bipyridine.

scholarly journals Single entity electrochemistry and the electron transfer kinetics of hydrazine oxidation

Nano Research ◽  
2021 ◽  
Author(s):  
Ruiyang Miao ◽  
Lidong Shao ◽  
Richard G. Compton
Keyword(s):  
Electron Transfer ◽  
Bulk Solution ◽  
Relative Contribution ◽  
Rate Determining Step ◽  
Multistep Process ◽  
Ph Range ◽  
Electro Catalytic Oxidation ◽  
Single Particle Impact ◽  
The Impact ◽  
Kinetics Of

AbstractThe mechanism and kinetics of the electro-catalytic oxidation of hydrazine by graphene oxide platelets randomly decorated with palladium nanoparticles are deduced using single particle impact electrochemical measurements in buffered aqueous solutions across the pH range 2–11. Both hydrazine, N2H4, and protonated hydrazine N2H5+ are shown to be electroactive following Butler-Volmer kinetics, of which the relative contribution is strongly pH-dependent. The negligible interconversion between N2H4 and N2H5+ due to the sufficiently short timescale of the impact voltammetry, allows the analysis of the two electron transfer rates from impact signals thus reflecting the composition of the bulk solution at the pH in question. In this way the rate determining step in the oxidation of each specie is deduced to be a one electron step in which no protons are released and so likely corresponds to the initial formation of a very short-lived radical cation either in solution or adsorbed on the platelet. Overall the work establishes a generic method for the elucidation of the rate determining electron transfer in a multistep process free from any complexity imposed by preceding or following chemical reactions which occur on the timescale of conventional voltammetry.

scholarly journals Kinetics of electron transfer from NADH to the Escherichia coli nitric oxide reductase flavorubredoxin

FEBS Journal ◽  
2006 ◽  
Vol 274 (3) ◽  
pp. 677-686 ◽  
Author(s):  
João B. Vicente ◽  
Francesca M. Scandurra ◽  
João V. Rodrigues ◽  
Maurizio Brunori ◽  
Paolo Sarti ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Escherichia Coli ◽  
Electron Transfer ◽  
Nitric Oxide Reductase ◽  
Kinetics Of

Analysis of Kinetics of Electron Transfer in the Reaction Centers of Photosynthetic Bacteria Using the Rips—Jortner Model

2005 ◽  
Vol 405 (1-6) ◽  
pp. 461-464 ◽  
Author(s):  
A. I. Kotel'nikov ◽  
N. S. Goryachev ◽  
A. Yu. Rubtsov ◽  
B. L. Psikha ◽  
J. M. Ortega
Keyword(s):  
Electron Transfer ◽  
Photosynthetic Bacteria ◽  
Reaction Centers ◽  
Kinetics Of
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