Preparation of FTO/CU2O Electrode Protected by PEDOT:PSS and Its Better Performance in the Photoelectrocatalytic Reduction of CO2 to Methanol

Autor(es)

Sanchez de la Cruz, Pamela Teresa ^[1] ; Irikura, Kallyni ^[2] ; Lachgar, Abdessadek ^[3] ; Cardoso, Juliano Carvalho ^[4] ; Alarcon Cavero, Hugo ^[1] ; Boldrin Zanoni, Maria Valnice ^[2]

Afiliação do(s) autor(es)

^[1] Natl Univ Engn, Fac Sci, Av Tupac Amaru 210, Lima 15333 - Peru

^[2] Sao Paulo State Univ, Inst Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, UNESP, Araraquara, SP - Brazil

^[3] Wake Forest Univ, Dept Chem, Winston Salem, NC 27109 - USA

^[4] Univ Fed Mato Grosso do Sul, Inst Chem, Av Senador Filinto Muller 1555, CP 549, BR-79074460 Campo Grande, MS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ELECTROCATALYSIS; v. 11, n. 5 JUN 2020.
• Citações Web of Science: 0

Resumo

Copper(I) oxide (Cu2O) was electrochemically deposited on fluorine-doped tin oxide (FTO) glass electrode and covered with a thin layer of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The electrode was studied in the photoelectrocatalytic reduction of CO2. Methanol was obtained as the major product with a concentration of 460 mu mol L(-1)with a photoconversion yield of 12% after 60 min of reaction under the conditions of UV-Vis (125 W Hg high pressure lamp) and application of 0.0 V vs Ag/AgCl in 3.0 mol L-1 KCl in buffer sodium carbonate/sodium bicarbonate 0.1 mol L(-1)saturated with CO(2)gas. The PEDOT:PSS has led to a significant improvement in CO(2)conversion due to rapid transfer of photogenerated holes. Consequently, the thin layer of PEDOT:PSS also reduces the photooxidation of Cu2O to CuO. The Cu2O/PEDOT:PSS photocatalytic system was found to have excellent photostability. Similar yield of alcohol was observed after reusing the catalyst six times. (AU)

• Processo FAPESP: 17/12790-7 - Preparação e caracterização de eletrodos nanoestruturados de TiO2 modificados com estruturas metal orgânico (MOFs) para a aplicação na pré-concentração e redução de CO2
• Beneficiário: Kallyni Irikura
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/18109-4 - Contribuição dos Materiais Nanoestruturados na Eletroanálise de Fármacos e Corantes, na Oxidação e Redução Fotoeletrocatalítica de Poluentes Orgânicos e Inorgânicos e Desinfecção de Água
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Regular