On the physical and electrochemical properties of MLG-based electrode surfaces modified by microwave-assisted reactive plasma

Autor(es):Mostrar menos -

Moura, Gabriel de Moraes ^[1] ; da Silva, Camila Cristina ^[1] ; Araujo Naves, Emiliane Andrade ^[1] ; Moreto, Jeferson Aparecido ^[2] ; Ferreira, Deusmaque Carneiro ^[1] ; de Oliveira, Paulo Roberto ^[1] ; Kalinke, Cristiane ^[3] ; Scarminio, Jair ^[4] ; de Siervo, Abner ^[5] ; da Cunha, Thiago Henrique R. ^[6] ; Gelamo, Rogerio Valentim ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Triangulo Mineiro UFTM, Inst Technol & Exact Sci, Ave Doutor Randolfo Borges Jr, BR-38064200 Uberaba, MG - Brazil

^[2] Fed Univ Triangulo Mineiro UFTM, Inst Exact Sci Nat & Educ, Ave Doutor Randolfo Borges Jr, BR-38064200 Uberaba, MG - Brazil

^[3] Univ Campinas UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil

^[4] State Univ Londrina UEL, Phys Dept, BR-86057970 Londrina, Parana - Brazil

^[5] Univ Campinas UNICAMP, Gleb Wataghin Inst Phys IFGW, BR-13083859 Campinas, SP - Brazil

^[6] Univ Fed Minas Gerais, Ctr Technol Nanomat & Graphene CTNano, Rua Prof Jose Vieira de Mendonca 520, BR-31310260 Belo Horizonte, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 272, OCT 2021.
• Citações Web of Science: 0

Resumo

The reactive plasma technique is often employed to activate the surface of materials both chemically and physically. Considering that several parameters should be handled in a plasma treatment process, a multivariate experimental design of three factors in two levels was employed to define the plasma treatment configurations under which the MLG were submitted. Plasma intensity, partial pressure of oxygen and reaction time were employed in the experimental planning. The surface morphology, the generation of C-C bond defects, surface chemical composition, interfacial free energy, and electrochemical properties were analyzed for the MLG electrodes as a function of the plasma treatment parameters. The treatments effectively promoted the MLG electrode's surface activation, considering the results obtained, which showed a dependence on those plasma treatment variables. The results suggested that plasma treatment variable adjustments can be used to modulate specific surface properties and with potential applicability in electrochemical sensors and supercapacitors. (AU)

• Processo FAPESP: 07/54829-5 - Estrutura eletrônica e geométrica de nano materiais: um estudo por radiação sincroton
• Beneficiário: Richard Landers
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 07/08244-5 - Estudo das propriedades magnéticas de filmes ultrafinos e nanopartículas de Pd e PdAu via XMCD
• Beneficiário: Abner de Siervo
• Modalidade de apoio: Auxílio à Pesquisa - Regular