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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.)

Acidic surface niobium pentoxide is catalytic active for CO2 photoreduction

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Author(s):
da Silva, Gelson T. S. T. [1, 2] ; Nogueira, Andre E. [3] ; Oliveira, Jessica A. [4, 2] ; Torres, Juliana A. [2] ; Lopes, Osmando F. [5] ; Ribeiro, Caue [2]
Total Authors: 6
Affiliation:
[1] Fed Univ Sao Carlos UFSCar, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[2] Natl Nanotechnol Lab Agribusiness LNNA, Embrapa Instrumentat, BR-13561206 Sao Carlos, SP - Brazil
[3] CNPEM, Brazillian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil
[4] Fed Univ Sao Carlos UFSCar, Dept Chem Engn, BR-13565905 Sao Carlos, SP - Brazil
[5] Univ Fed Uberlandia, Inst Chem, BR-38400902 Uberlandia, MG - Brazil
Total Affiliations: 5
Document type: Journal article
Source: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 242, p. 349-357, MAR 2019.
Web of Science Citations: 4
Abstract

In this paper, we report for the first time the significant photocatalytic activity of Nb-based materials for CO2 reduction. Nb2O5 catalysts were prepared through a modified peroxide sol-gel method using different annealing temperatures, showing activity for CO2 photoreduction in all conditions. The activity and selectivity of the Nb2O5 samples were directly related to their surface acidity: high surface acidity prompted conversion of CO2 to CO, HCOOH, and CH3COOH; low surface acidity prompted conversion of CO2 to CH4. The results also indicated that CO is the main intermediate species of the CO2 photoreduction in all conditions. We have uncovered the role played by the surface acidity of Nb2O5 and the mechanism behind its performance for CO2 photoreduction. (AU)

FAPESP's process: 15/14330-8 - Studies in the synthesis and application of semiconducting nanocrystal heterostructures in artificial photosynthetic processes
Grantee:Cauê Ribeiro de Oliveira
Support type: Research Program on Global Climate Change - Regular Grants
FAPESP's process: 16/09746-3 - Electro-/Photoelectrocatalysis Reduction of CO2: Efficiency, Selectivity and Oscillatory Kinetics
Grantee:Osmando Ferreira Lopes
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 16/21515-7 - Development of magnesium oxide with zinc and titanium heterostructure for application in artificial photosynthesis processes
Grantee:Juliana Arriel Torres
Support type: Scholarships in Brazil - Post-Doctorate