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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP208%2F11%2F0697" target="_blank" >GAP208/11/0697: Katalýza redukce kyslíku bezkovovými porfyriny na elektrochemicky polarizovaných kapalných rozhraních</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry A

ISSN

1089-5639

e-ISSN

—

Svazek periodika

118

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

2018-2028

Kód UT WoS článku

000333381700006

EID výsledku v databázi Scopus

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