Electro-/Photoelectrocatalysis Reduction of CO2: Efficiency, Selectivity and Oscillatory Kinetics

• Grant number: 16/09746-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: September 01, 2016
• End date: August 09, 2018
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Hamilton Brandão Varela de Albuquerque
• Grantee: Osmando Ferreira Lopes
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion, AP.TEM

Abstract

The electrocatalytic reduction of CO2 into organic molecules (C1 and C2) is an alternative with great potential for climate change mitigation, besides the possibility of renewable energy production. The research in electrocatalytic reduction of CO2 began in the late 60's, but several technological and fundamental challenges must be overcome in this field research, such as the low electrocatalytic activity, the extreme overpotential and the poor selectivity of the products formed. Therefore, the aims of this proposal are: (i) to study the role of particle size, morphology and chemical composition of the Cu and Ag electrocatalysts on their catalytic activity and selectivity in the reduction of CO2; (ii) to investigate the effect of the operating conditions of reaction system, such as pH, temperature, and nature and concentration of the electrolyte solution on the catalytic activity, selectivity and reaction mechanism of the reduction of CO2; (iii) to propose a photoelectrochemical system employing a Cu or Ag cathode combined with an anode photoactive containing a semiconductor type n (c.f. TiO2 or BiVO4) to reduce the overpotential and control the selectivity in the reduction of CO2; (iv) to study the electrocatalytic reduction of CO2 under oscillatory regime, since in these conditions it is possible to obtain mechanistic information that is inaccessible by regular regime, besides the possibility of increase the catalytic efficiency. The techniques of on line Differential Electrochemical Mass Spectrometry, High Performance Liquid Chromatography, in situ Infrared Spectroscopy will be used to detect the products formed in gas and liquid phases, and the intermediate species, respectively.

Scientific publications

(13)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PUPPIN, LARA G.; DA SILVA, LUIS F.; CARMO, MARCELO; VARELA, HAMILTON; LOPES, OSMANDO F.. Effect of the oxidation state and morphology of SnOx-based electrocatalysts on the CO2 reduction reaction. Journal of Materials Research, JUN 2021. (13/16930-7, 19/22183-6, 17/09713-0, 16/09746-3)

ROMERO T. BUENO; OSMANDO F. LOPES; KELE T. G. CARVALHO; CAUE RIBEIRO; HENRIQUE A. J. L. MOURÃO. Semicondutores heteroestruturados: uma abordagem sobre os principais desafios para a obtenção e aplicação em processos fotoquímicos ambientais e energéticos. Química Nova, v. 42, n. 6, p. 661-675, 2019-08-15. (13/13888-0, 18/04558-0, 18/01258-5, 15/12304-0, 16/09746-3, 15/14330-8)

DA SILVA, GELSON T. S. T.; CARVALHO, KELE T. G.; LOPES, OSMANDO F.; GOMES, ELIZIANA S.; MALAGUTTI, ANDREA R.; MASTELARO, VALMOR R.; RIBEIRO, CAUE; MOURAO, HENRIQUE A. J. L.. Synthesis of ZnO Nanoparticles Assisted by N Sources and their Application in the Photodegradation of Organic Contaminants. CHEMCATCHEM, v. 9, n. 19, p. 3795-3804, OCT 10 2017. (16/09746-3, 13/17639-4, 15/12304-0, 13/13888-0)

LOPES, OSMANDO F.; CARVALHO, KELE T. G.; AVANSI, JR., WALDIR; MILORI, DEBORA M. B.; RIBEIRO, CAUE. Insights into the photocatalytic performance of Bi2O2CO3/BiVO4 heterostructures prepared by one-step hydrothermal method. RSC ADVANCES, v. 8, n. 20, p. 10889-10897, 2018. (15/12304-0, 13/13888-0, 16/09746-3)

DA SILVA, GELSON T. S. T.; NOGUEIRA, ANDRE E.; OLIVEIRA, JESSICA A.; TORRES, JULIANA A.; LOPES, OSMANDO F.; RIBEIRO, CAUE. Acidic surface niobium pentoxide is catalytic active for CO2 photoreduction. APPLIED CATALYSIS B-ENVIRONMENTAL, v. 242, p. 349-357, MAR 2019. (16/09746-3, 16/21515-7, 15/14330-8)

PUPPIN, LARA G.; DA SILVA, LUIS F.; CARMO, MARCELO; VARELA, HAMILTON; LOPES, OSMANDO F.. Effect of the oxidation state and morphology of SnOx-based electrocatalysts on the CO2 reduction reaction. Journal of Materials Research, v. 36, n. 20, SI, p. 4240-4248, OCT 28 2021. (16/09746-3, 13/16930-7, 17/09713-0, 19/22183-6)

NOGUEIRA, ANDRE E.; DA SILVA, GELSON T. S. T.; OLIVEIRA, JESSICA A.; TORRES, JULIANA A.; DA SILVA, MITCHELL G. S.; CARMO, MARCELO; RIBEIRO, CAUE. Unveiling CuO role in CO2 photoreduction process - Catalyst or reactant?. Catalysis Communications, v. 137, APR 5 2020. (18/01258-5, 16/21515-7, 16/09746-3, 14/09014-7, 15/14330-8)

NOGUEIRA, ANDRE E.; OLIVEIRA, JESSICA A.; DA SILVA, GELSON T. S. T.; RIBEIRO, CAUE. Insights into the role of CuO in the CO2 photoreduction process. SCIENTIFIC REPORTS, v. 9, FEB 4 2019. (16/09746-3, 16/21515-7, 14/09014-7, 15/14330-8)

CARVALHO, KELE T. G.; LOPES, OSMANDO F.; FERREIRA, DEBORA C.; RIBEIRO, CAUE. ZnO:ZnWO4 heterostructure with enhanced photocatalytic activity for pollutant degradation in liquid and gas phases. Journal of Alloys and Compounds, v. 797, p. 1299-1309, AUG 15 2019. (16/09746-3, 13/17639-4, 15/12304-0, 13/13888-0)

LOPES, OSMANDO F.; VARELA, HAMILTON. Effect of Annealing Treatment on Electrocatalytic Properties of Copper Electrodes toward Enhanced CO2 Reduction. CHEMISTRYSELECT, v. 3, n. 31, p. 9046-9055, AUG 23 2018. (16/09746-3, 13/16930-7)

DA SILVA, GELSON T. S. T.; CARVALHO, KELE T. G.; LOPES, OSMANDO F.; RIBEIRO, CAUE. g-C3N4/Nb2O5 heterostructures tailored by sonochemical synthesis: Enhanced photocatalytic performance in oxidation of emerging pollutants driven by visible radiation. APPLIED CATALYSIS B-ENVIRONMENTAL, v. 216, p. 70-79, NOV 5 2017. (16/09746-3, 13/17639-4, 15/12304-0, 13/13888-0)

PUPPIN, LARA G.; KHALID, MOHD; DA SILVA, GELSON T. T.; RIBEIR, CAUE O; VARELA, HAMILTON; LOPES, OSMANDO F.. Electrochemical reduction of CO2 to formic acid on Bi2O2CO3/carbon fiber electrodes. Journal of Materials Research, v. 35, n. 3, p. 272-280, FEB 14 2020. (18/01258-5, 17/09713-0, 17/00433-5, 16/09746-3, 13/16930-7)

NOGUEIRA, ANDRE E.; SILVA, GELSON T. S. T.; OLIVEIRA, JESSICA A.; LOPES, OSMANDO F.; TORRES, JULIANA A.; CARMO, MARCELO; RIBEIRO, CAUE. CuO Decoration Controls Nb2O5 Photocatalyst Selectivity in CO2 Reduction. ACS APPLIED ENERGY MATERIALS, v. 3, n. 8, p. 7629-7636, AUG 24 2020. (16/21515-7, 18/01258-5, 14/09014-7, 16/09746-3, 15/14330-8)