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

Author(s)

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]}

Affiliation

^[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

• Document type: Journal article
• Source: JOURNAL OF CO2 UTILIZATION; v. 43, JAN 2021.
• Web of Science Citations: 0

Abstract

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