The importance of the shape of Cu2O nanocrystals on plasmon-enhanced oxygen evolution reaction in alkaline media

Author(s):Show less -

Saada, Tamazouzt Nait ^{[1, 2]} ; Pang, Liuqing ^[2] ; Kumar, Kilaparthi Sravan ^[2] ; Dourado, Andre H. B. ^[3] ; Germano, Lucas D. ^[3] ; Vicentini, Eduardo D. ^[4] ; Batista, Ana P. L. ^[4] ; De Oliveira-Filho, Antonio G. S. ^[4] ; Dumeignil, Franck ^[5] ; Paul, Sebastien ^[6] ; Wojcieszak, Robert ^[5] ; Melinte, Sorin ^[6] ; Sandu, Georgiana ^[6] ; Petretto, Guido ^[6] ; Rignanese, Gian-Marco ^[6] ; Braga, Adriano Henrique ^[3] ; Rosado, Taissa F. ^[7] ; Meziane, Dalila ^[1] ; Boukherroub, Rabah ^[2] ; Cordoba de Torresi, I, Susana ; da Silva, Anderson G. M. ^[7] ; Szunerits, Sabine ^[2]

Affiliation

^[1] Univ Mouloud Mammeri Tizi Ouzou, Lab Appl Chem & Chem Engn LCAGC, Tizi Ouzou - Algeria

^[2] Univ Lille, Cent Lille Univ Polytech Hauts de France, CNRS, UMR 8520 IEMN, F-59000 Lille - France

^[3] I, Univ Sao Paulo, Dept Quim Fundamental, Inst Quim, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil

^[4] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil

^[5] Univ Lille, Univ Artois, Cent Lille, UMR 8181, UCCS Unite Catalyse & Chim Solide, CNRS, F-59000 Lille - France

^[6] Catholic Univ Louvain, B-1348 Louvain La Neuve - Belgium

^[7] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Engn Quim & Mat DEQM, Rua Marques Sao Vicente 225, BR-22453900 Rio De Janeiro, RJ - Brazil

• Document type: Journal article
• Source: Electrochimica Acta; v. 390, SEP 10 2021.
• Web of Science Citations: 0

Abstract

Cu2O nanostructures of cubic or octahedral shape as well as decorated with gold nanoparticles were synthesized by a chemical process. The electrochemical activity of these nanostructures for the oxygen evolution reaction (OER) in alkaline media was assessed in the dark and under solar light irradiation. Electrodes modified with cubic-shaped Cu2O and Cu2O-Au nanostructures revealed both enhanced electrocatalytic OER activity over the octahedral-shaped ones, for which hydroxylation of the (111) surfaces might hinder the OER as supported by numerical computations. Illumination of Cu2O nanostructures with solar light did not enhance the electrocatalytic OER. Cu2O-Au nanostructures, however, showed improved OER activity with an overpotential of 200 mV (10 mA cm(-2)) and a Tafel slope of 97 mV dec(-1). The enhanced OER activity was ascribed to increased light absorption due to the plasmonic properties of Cu2O-Au cubes. (C) 2021 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 18/22845-6 - Controlled nanostructures based on metal hidroxides and noble metals applied to electrocatalytic of oxygen evolution reaction
• Grantee: Lucas Dias Germano
• Support type: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 18/25567-7 - Plasmonic electrocatalysis: investigating shape-dependent charge transfer processes in Cu2O-Au nanocrystals
• Grantee: Anderson Gabriel Marques da Silva
• Support type: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 17/12407-9 - Hybrid nanostructures of transition metal oxides and conducting polymers for various applications
• Grantee: Anderson Gabriel Marques da Silva
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 15/26308-7 - Optimization of the physicochemical properties of nano -structured materials for applications in molecular recognition, catalysis and energy conversion/storage
• Grantee: Roberto Manuel Torresi
• Support type: Research Projects - Thematic Grants