Artículo
Fe-Ni porphyrin/mesoporous titania thin film electrodes: a bioinspired nanoarchitecture for photoelectrocatalysis
Herrera, Facundo Carlos
; Caraballo, Rolando Manuel
; Vensaus, Priscila
; Soler Illia, Galo Juan de Avila Arturo
; Hamer, Mariana
Fecha de publicación:
05/2024
Editorial:
Royal Society of Chemistry
Revista:
RSC Advances
ISSN:
2046-2069
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Porphyrin and porphyrinoid derivatives have been extensively studied in the assembly of catalysts and sensors, seeking a biomimetic and bioinspired activity. In particular, Fe and Ni porphyrins can be used for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by immobilization of these molecular catalysts on semiconductor materials. In this opportunity, we designed a hybrid material containing a crystalline mesoporous TiO2 thin film in which the catalytic centres are Ni-porphyrin (NiP), Fe-porphyrin (FeP), and a NiP/FeP bimetallic system to assess whether the coexistence of both metalloporphyrins improves the OER activity. The obtained photoelectrodes were physicochemical and morphologically characterized through high-resolution FE-SEM images, UV-vis and Raman spectroscopies, cyclic voltammetry, and impedance measurements. The results show a differential behavior of the mono- and bimetallic porphyrin systems, where the Fe(III) centre in FeP may increase the acidity and lower the reduction potential of the Ni2+/3+ couple when co-deposited with NiP leading to an improved photoelectrochemical water-oxidation performance. We have validated the cooperative effect of both metal complexes within this novel system, where the μ-peroxo-bridged interaction between Fe and Ni is integrated into a supramolecular heterometallic structure of porphyrins.
Palabras clave:
PORPHYRIN
,
MOSOPOROUS THIN FILMS
,
OER
,
BIOMIMETICS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Herrera, Facundo Carlos; Caraballo, Rolando Manuel; Vensaus, Priscila; Soler Illia, Galo Juan de Avila Arturo; Hamer, Mariana; Fe-Ni porphyrin/mesoporous titania thin film electrodes: a bioinspired nanoarchitecture for photoelectrocatalysis; Royal Society of Chemistry; RSC Advances; 14; 23; 5-2024; 15832-15839
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