Plasmon-enhanced electrocatalytic oxygen reduction in alkaline media on gold nanohole electrodes

Autor(es):Mostrar menos -

Saada, Tamazouzt Nait ^{[1, 2]} ; da Silva, Anderson Gabriel Marques ^{[3, 1, 4]} ; Subramanian, Palaniappan ^[5] ; Pang, Liuqing ^[1] ; Adnane, Noual ^[6] ; Djafari-Rouhani, Bahram ^[1] ; Mishyn, Vladyslav ^[1] ; Meziane, Dalila ^[2] ; Melinte, Sorin ^[7] ; Sandu, Georgiana ^[7] ; Dumeignil, Franck ^[4] ; Paul, Sebastien ^[4] ; Wojcieszak, Robert ^[4] ; Boukherroub, Rabah ^[1] ; Szunerits, Sabine ^[1]

Afiliação do(s) autor(es)

^[1] Univ Lille, Univ Valenciennes, Cent Lille, CNRS, ISEN, UMR 8520, IEMN, F-59000 Lille - France

^[2] Univ Mouloud Mammeri Tizi Ouzou, Lab Appl Chem & Chem Engn LCAGC, Tizi Ouzou - Algeria

^[3] Univ Sao Paulo, Inst Chem, Sao Paulo - Brazil

^[4] Univ Lille, Univ Artois, UCCS Unite Catalyse & Chim Solide, CNRS, ENSCL, UMR 8181, Cent Lille, F-59000 Lille - France

^[5] Katholieke Univ Leuven, Dept Mat Engn, Kateelpk Arenberg, B-3001 Heverlee - Belgium

^[6] Univ Mohamed Premier, Fac Pluridisciplinaire Nador, LPMR, Oujda 60000 - Morocco

^[7] Catholic Univ Louvain, Inst Informat & Commun Technol Elect & Appl Math, B-1348 Louvain La Neuve - Belgium

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS CHEMISTRY A; v. 8, n. 20, p. 10395-10401, MAY 28 2020.
• Citações Web of Science: 2

Resumo

Plasmon-driven chemical transformation has become a promising approach for enhancing sluggish electrocatalytic reactions. Herein, an alternative enhancement strategy employing plasmon-induced hot electrons was developed and found to be competitive with oxygen reduction reaction (ORR) on platinum electrodes. We demonstrated that, by using the intertwined plasmon-catalytic-electrochemical properties of nanoperforated gold thin film electrodes, the ORR under alkaline conditions could be significantly enhanced by careful tuning of the laser wavelength and power density. Irradiation at 980 nm and 2 W cm(-2) displays maximal current densities of j = -6.0 A cm(-2) at 0.95 V vs. RHE, under hydrodynamic conditions, comparable to that of commercial Pt/C (40 wt%) catalysts, with good long-term stability. The wavelength-dependent electrochemical reduction confirmed that the hot carriers formed during plasmon decay are responsible for the improved electrocatalytic performance. (AU)

• Processo FAPESP: 18/25567-7 - Eletrocatálise plasmônica: investigando processos de transferência de carga dependentes da forma em nanocristais de Cu2O-Au
• Beneficiário: Anderson Gabriel Marques da Silva
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado