Inhibitory Effect of Water on the Oxygen Reduction Catalyzed by Cobalt(II) Tetraphenylporphyrin

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F14%3A00427152" target="_blank" >RIV/61388955:_____/14:00427152 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/jp500057x" target="_blank" >http://dx.doi.org/10.1021/jp500057x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/jp500057x" target="_blank" >10.1021/jp500057x</a>

Result language
angličtina
Original language name
Inhibitory Effect of Water on the Oxygen Reduction Catalyzed by Cobalt(II) Tetraphenylporphyrin
Original language description
Stopped- fl ow kinetic measurements, UV vis spectroscopy, rotating disk voltammetry, and quantum chemical calculations are used to clarify the role of water in the homogeneous two-electron reduction of O 2 to H 2 O 2 in 1,2-dichloroethane (DCE) using ferrocene (Fc) as an electron donor, tetrakis(penta fl uorophenyl)boric acid (HTB) as a proton donor, and [5,10,15,20-tetraphenyl-21 H ,23 H - porphine]cobalt(II) (Co II TTP) as a catalyst. Kinetic analysis suggests that the reaction is controlled by the intramolecular proton coupled electron transfer to the O 2 molecule coordinated to the metal center producing the O 2 H radical. This rate- determining step is common to both the O 2 reduction by Fc catalyzed by Co II TPP and the O 2 reduction by Co II TPPitself. Experimental data point to the competitive coordination of water to the metal center leading to a strong inhibition of the catalytic reaction. In agreement with this finding, quantum chemical calculations indicate that water is b
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
—

Project
<a href="/en/project/GAP208%2F11%2F0697" target="_blank" >GAP208/11/0697: Catalysis of the oxygen reduction by metal-free porphyrins at the electrochemically polarized liquid-liquid interfaces</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)