All-solution processed CuGaS2-based photoelectrodes for CO2 reduction

Author(s)

de Brito, Juliana Ferreira ; Santana Andrade Jr, Marcos Antonio ; Boldrin Zanoni, Maria Valnice ; Mascaro, Lucia Helena

• Document type: Journal article
• Source: JOURNAL OF CO2 UTILIZATION; v. 57, p. 12-pg., 2022-03-01.

Abstract

Considering the influence of carbon dioxide (CO2) on global warming, an all-solution approach is presented here to fabricate nanocrystalline film of the ternary chalcopyrite for the photoelectrochemical CO2 reduction. High-purity nanocrystalline catalysts CuGaS2, Cu(Ga,Bi)S-2, and Cu(Ga,In)S-2 were obtained by a facile and fast spray method using a molecular ink. Those semiconductors were evaluated in the photoelectrocatalytic CO2 reduction under illumination of 1 Sun (100 mW cm(-2) ) applying potentials from - 0.3 V to - 0.7 V vs Ag/AgCl. Methanol was identified as the major product, furthermore, 2 C and 3 C compounds were also identified. Despite the interesting results, doping with In and Bi caused the formation of defects in the absorber layer, probably inducing recombination mechanisms, thus, affecting the stability and the performance of the photocathode in the CO2 reduction. Meanwhile, Mo/CuGaS2/CdS/TiO2 photocathode showed promising stability and reproducibility for CO2 reduction under illumination (100 mW cm(-2)) for 240 min at - 0.7 V. (AU)

• FAPESP's process: 18/26005-2 - Metal-doped chalcogenides for all-solution processed thin film solar cells
• Grantee: Marcos Antonio Santana Andrade Junior
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 18/16401-8 - Photocatalysts and photoelectrodes for obtaining renewable fuels
• Grantee: Lucia Helena Mascaro Sales
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/15144-9 - Metal-doped chalcogenides for application in intermediate band solar cells
• Grantee: Marcos Antonio Santana Andrade Junior
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/02950-0 - Photoelectrocatalytic reduction of N2 to NH3 in a photoelectrochemistry reactor with a photoanode-driven of Nb2O5/Pt and cathode of GDL decorated with Fe, Co and Sb2Se3
• Grantee: Juliana Ferreira de Brito
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
• Grantee: Ana Flávia Nogueira
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock
• Grantee: Arlene Gonçalves Corrêa
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC