Diamond/porous titanium three-dimensional hybrid electrodes

Autor(es)

Braga, N. A. ^[1] ; Cairo, C. A. A. ^[2] ; Matsushima, J. T. ^[1] ; Baldan, M. R. ^[1] ; Ferreira, N. G. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Nacl Pesquisas Espaciais, BR-12245970 Sao Jose Dos Campos, SP - Brazil

^[2] Comandogeral Tecnol Aeroespacial, BR-12228904 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Solid State Electrochemistry; v. 14, n. 2, p. 313-321, FEB 2010.
• Citações Web of Science: 22

Resumo

Hybrid three-dimensional electrodes produced from microcrystalline boron-doped diamond (BDD) and/or nanocrystalline diamond films were grown on porous titanium (Ti) substrate by hot filament chemical vapor deposition (HFCVD) technique. Powder metallurgy technique was used to obtain the Ti substrates provided by interconnected and open pores among its volume. Diamond growth parameters were optimized in order to provide the entire substrate surface covering including the deeper surfaces, pore bottoms, and walls. The morphology and structure of these electrodes were studied by scanning electron microscopy (SEM) and visible Raman spectroscopy techniques, respectively. Electrochemical response was characterized by cyclic voltammetry measurements. Results showed a wide working potential window and low background current characteristic of the diamond electrodes. The kinetic parameters also pointed out to a quasi-reversible behavior for these hybrid three-dimensional diamond/Ti electrodes. (AU)

• Processo FAPESP: 07/00013-4 - Novos materiais, estudos e aplicações inovadoras em diamante-CVD, diamond-like-carbon (DLC) e carbono nanoestruturado obtidos por deposição química a partir da fase vapor
• Beneficiário: Evaldo Jose Corat
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 08/04968-1 - Crescimento de diamante micro/nanoestruturado e nanotubos de carbono sobre titânio puro tridimensionalmente poroso para aplicação em tratamento de água
• Beneficiário: Neila de Almeida Braga
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado