Universität zu Köln

Guergueb, Mouhieddinne, Loiseau, Frederique, Molton, Florian, Nasri, Habib and Klein, Axel ORCID: 0000-0003-0093-9619 (2022). CO2 to CO Electroreduction, Electrocatalytic H-2 Evolution, and Catalytic Degradation of Organic Dyes Using a Co(II) meso-Tetraarylporphyrin. Molecules, 27 (5). BASEL: MDPI. ISSN 1420-3049

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Abstract

The meso-tetrakis(4-(trifluoromethyl)phenyl)porphyrinato cobalt(II) complex [Co(TMFPP)] was synthesised in 93% yield. The compound was studied by H-1 NMR, UV-visible absorption, and photoluminescence spectroscopy. The optical band gap Eg was calculated to 2.15 eV using the Tauc plot method and a semiconducting character is suggested. Cyclic voltammetry showed two fully reversible reduction waves at E-1/2 = -0.91 V and E-1/2 = -2.05 V vs. SCE and reversible oxidations at 0.30 V and 0.98 V representing both metal-centred (Co(0)/Co(I)/Co(II)/Co(III)) and porphyrin-centred (Por(2-)/Por(-)) processes. [Co(TMFPP)] is a very active catalyst for the electrochemical formation of H-2 from DMF/acetic acid, with a Faradaic Efficiency (FE) of 85%, and also catalysed the reduction of CO2 to CO with a FE of 90%. Moreover, the two triarylmethane dyes crystal violet and malachite green were decomposed using H2O2 and [Co(TMFPP)] as catalyst with an efficiency of more than 85% in one batch.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Guergueb, Mouhieddinne UNSPECIFIED UNSPECIFIED UNSPECIFIED Loiseau, Frederique UNSPECIFIED UNSPECIFIED UNSPECIFIED Molton, Florian UNSPECIFIED UNSPECIFIED UNSPECIFIED Nasri, Habib UNSPECIFIED UNSPECIFIED UNSPECIFIED Klein, Axel UNSPECIFIED orcid.org/0000-0003-0093-9619 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-682191
DOI:	10.3390/molecules27051705
Journal or Publication Title:	Molecules
Volume:	27
Number:	5
Date:	2022
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	1420-3049
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language METAL NITROXYL INTERACTIONS; LIGAND ADDITION-REACTIONS; COBALT PORPHYRINS; HYDROGEN-PRODUCTION; TETRAPHENYLPORPHYRIN COMPLEXES; REDUCTION; WATER; PYRIDINE; REDOX; METALLOPORPHYRINS Multiple languages Biochemistry & Molecular Biology; Chemistry, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68219