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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Relation between the nature of the surface facets and the reactivity of Cu2O nanostructures anchored on TiO2NT@PDA electrodes in the photoelectrocatalytic conversion of CO2 to methanol

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Moura Torquato, Lilian D. [1, 2] ; Pastrian, Fabian A. C. [3] ; Lima Perini, Joao A. [1, 2] ; Irikura, Kallyni [1, 2] ; Batista, Ana Paula de L. [4] ; de Oliveira-Filho, Antonio G. S. [4] ; Cordoba de Torresi, Susana I. [3] ; Boldrin Zanoni, Maria V. [1, 2]
Total Authors: 8
[1] Sao Paulo State Univ Unesp, Inst Chem, 55 Prof Francisco Degni St, BR-14800060 Araraquara, SP - Brazil
[2] Sao Paulo State Univ UNESP, Natl Inst Alternat Technol Detect Toxicol Evaluat, BR-14800060 Araraquara, SP - Brazil
[3] Univ Sao Paulo, Inst Chem, 748 Prof Lineu Prestes Ave, BR-05508000 Sao Paulo, SP - Brazil
[4] Univ Sao Paulo, Fac Philosophy Sci & Letters, 3900 Bandeirantes Ave, BR-14040901 Ribeirao Preto, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Web of Science Citations: 3

This paper investigates the influence of morphology of Cu2O nanoparticles (cubes, NcCu(2)O; spheres, NsCu(2)O; octahedrons, NoCu2O), deposited on TiO2 nanotubes (TiO2NT) coated with PDA, in the photoelectrocatalytic conversion of CO2 to methanol. At low bias (+0.2 V) a production of 10.0, 6.0 and 5.4 mg L-1 of methanol was obtained for TiO2NT@PDA-NsCu(2)O, TiO2NT@PDA-NoCu2O, and TiO2NT@PDA-NcCu(2)O electrodes, with faradaic efficiencies of 27, 39, and 66%, respectively. The conversion to methanol was 357% higher with NcCu(2)O, compared to the TiO2NT@PDA electrode. The results indicated that both the optical properties and the photocatalytic performance of nanostructures were facet-dependent. The superior catalytic activity of NcCu(2)O was attributed to the higher concentration of oxygen vacancies on [100] facets, which promotes the activation of CO2 with an energy of -1.2 kcal mol(-1). With a lower concentration of oxygen vacancies, CO2 molecule is only physisorbed on [111] facets with an energy of -8.8 kcal mol(-1). (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/12790-7 - Preparation and characterization of TiO2 nanostructured electrodes modified with metal organic frameworks (MOFs) for application in the preconcentration and reduction of CO2
Grantee:Kallyni Irikura
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 19/00463-7 - Integrated and solar-driven bioelectrochemical systems for electricity and H2 production from co-digestion of crude glycerol and wastewater from citrus processing industry
Grantee:Lilian Danielle de Moura Torquato
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/11631-2 - Computational material science and chemistry
Grantee:Juarez Lopes Ferreira da Silva
Support type: Research Grants - Research Centers in Engineering Program
FAPESP's process: 16/18057-7 - CO2 reduction aiming to generate value-added compounds by photocatalysis/photoelectrocatalysis using ionic liquid in a pressurized reactor
Grantee:João Angelo de Lima Perini
Support type: Scholarships in Brazil - Post-Doctorate