| Full text | |
| Author(s): |
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
|
| Affiliation: | [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 |
| Source: | APPLIED CATALYSIS B-ENVIRONMENTAL; v. 261, FEB 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
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: | 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: | 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: | 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 |
| 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 |