Artículo
Photocatalysis and photoelectrochemical glucose oxidation on Bi2WO6: Conditions for the concomitant H2 production
Madriz Ruiz, Lorean Mercedes
; Tatá, José; Carvajal, David; Núñez, Oswaldo; Scharifker, Benjamín R.; Mostany, Jorge; Borrás, Carlos; Cabrerizo, Franco Martín
; Vargas Balda, Ronald Eduardo
Fecha de publicación:
06/2020
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
Renewable Energy
ISSN:
0960-1481
e-ISSN:
1879-0682
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Glucose solar light photoinduced oxidation on Bi2WO6 and the chemical kinetics conditions for concurrent photoelectrochemical H2 production are reported. The results show that the conversion of this organic compound is determined by their surface concentration according to the Langmuir-Hinshelwood mechanism. The performance of Bi2WO6 powder for the photocatalytic oxidation of glucose is higher than that observed with TiO2-based materials. Glucose degradation and mineralization rates are similar; therefore, stable intermediates are not formed during glucose oxidation. Photoluminescence studies indicate that glucose promotes electron injection into the valence band of semiconductor. The initial glucose concentration in combination with the electrode potential used, determines the H2 production. In fact, electrode potential of 0.9 V vs. SHE and 60 ppm of glucose defines kobs values equal to kK with maximum H2 evolution rate: 3.05 μmol h−1 cm−2. This value arises from the transformation of the 97% of the Faradaic current measured. The phenomenological conditions for renewable energy applications have been envisaged.
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Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(IIB-INTECH)
Articulos de INST.DE INVEST.BIOTECNOLOGICAS - INSTITUTO TECNOLOGICO CHASCOMUS
Articulos de INST.DE INVEST.BIOTECNOLOGICAS - INSTITUTO TECNOLOGICO CHASCOMUS
Citación
Madriz Ruiz, Lorean Mercedes; Tatá, José; Carvajal, David; Núñez, Oswaldo; Scharifker, Benjamín R.; et al.; Photocatalysis and photoelectrochemical glucose oxidation on Bi2WO6: Conditions for the concomitant H2 production; Pergamon-Elsevier Science Ltd; Renewable Energy; 152; 6-2020; 974-983
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