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Direct synthesis of Ru-3(BTC)(2) metal-organic framework on a Ti/TiO2NT platform for improved performance in the photoelectroreduction of CO2

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Irikura, Kallyni [1, 2] ; Lima Perini, Joao Angelo [1, 2] ; Silva Flor, Jader Barbosa [1, 2] ; Galvao Frem, Regina Celia [1] ; Boldrin Zanoni, Maria Valnice [1, 2]
Total Authors: 5
[1] Sao Paulo State Univ UNESP, Inst Chem, Araraquara, SP - Brazil
[2] Sao Paulo State Univ UNESP, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF CO2 UTILIZATION; v. 43, JAN 2021.
Web of Science Citations: 0

This work describes the use of a thin film of Ru-3(BTC)(2) metal-organic framework (MOF) deposited onto Ti/TiO2 nanotubes as a photocathode in CO2 reduction. This approach combines the advantages of the ruthenium MOF as a heterogeneous catalyst and as an agent for trapping CO2 on its active sites, resulting in an eco-friendly technology for photoelectrocatalysis and the photoconversion of CO2 to methanol in aqueous media. Morphological and crystallographic analyses showed that thin films of Ru-3(BTC)(2) MOF could be deposited homogeneously onto anatase TiO2 nanotubes, improving the photocurrent response of the electrode to on/off cycles of UV/Vis light illumination. Under optimized conditions, the Ti/TiO2NT-Ru-3(BTC)(2) electrode produced 314 mu mol L-1 of methanol by photoelectrocatalysis after 3 h, which was 2.3-fold higher than obtained by a photocatalytic process. The results indicated that the construction of multifunctional materials, such as by the deposition of the porous crystalline Ru-3(BTC)(2) MOF onto Ti/TiO2 electrodes, can lead to a new generation of porous photoelectrocatalysts suitable for the capture of CO2 and its selective reduction to methanol. (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: 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