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Electrochemical evidence of catalysis of oxygen reduction at the polarized liquid–liquid interface by tetraphenylporphyrin monoacid and diacid

SYSNO ASEP	0330442
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Electrochemical evidence of catalysis of oxygen reduction at the polarized liquid–liquid interface by tetraphenylporphyrin monoacid and diacid
Title	Elektrochemický důkaz katalytické redukce kyslíku protonizovaným a diprotonizovaným tetraphenylporphyrinem na polarizovaném rozhraní nemísitelných roztoků elektrolytů
Author(s)	Trojánek, Antonín (UFCH-W)_RID Langmaier, Jan (UFCH-W)_{RID, ORCID, SAI} Su, B. (CH) Girault, H. H. (CH) Samec, Zdeněk (UFCH-W)_{RID, ORCID}
Source Title	Electrochemistry Communications. - : Elsevier - ISSN 1388-2481 Roč. 11, č. 10 (2009), s. 1940-1943
Number of pages	4 s.
Language	eng - English
Country	NL - Netherlands
Keywords	liquid-liquid interface ; oxygen reduction ; decamethylferrocene ; catalysis
Subject RIV	CG - Electrochemistry
R&D Projects	GA203/07/1257 GA ČR - Czech Science Foundation (CSF)
	OC 177 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000271571300024
DOI	10.1016/j.elecom.2009.08.022
Annotation	Cyclic voltammetry is used to study the role of 5,10,15,20-tetraphenyl-21H,23H-porphine (H2TPP) in the reduction of molecular oxygen by decamethylferrocene (DMFc) at the polarized water\|1,2-dichloroethane (DCE) interface. It is shown that this rather slow reaction proceeds remarkably faster in the presence of tetraphenylporphyrin monoacid (H3TPP+) and diacid (H4TPP2+), which are formed in DCE by the successive transfer of two protons from the acidified aqueous phase. A mechanism is proposed, which includes the formation of adduct between H3TPP+ or H4TPP2+ and O2 that is followed by electron transfer from DMFc to the adduct leading to the observed production of DMFc+ and to the regeneration of H2TPP or H3TPP+, respectively.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2010

Number of the records: 1