Facile One-Step Electrodeposition Fabrication of Amorphous MoS2 Catalysts in Titanium for Hydrogen Evolution Reaction

Autor(es)

Medina, Marina ^[1] ; Corradini, Patricia G. ^[1] ; Mascaro, Lucia H. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Quim, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 30, n. 10, SI, p. 2210-2218, OCT 2019.
• Citações Web of Science: 0

Resumo

Hydrogen is seen as a future energy carrier that will assist the global energy fuel demand. However. it is still necessary to study efficient and inexpensive catalysts that can be used on a large scale to make this technology practical. In this paper the electrodeposition of molybdenum disulfide (MoS2) film on titanium (Ti) substrate was performed by cyclic voltammetry and the film was evaluated for hydrogen evolution reaction (HER). The deposition optimized conditions was 25 cycles and 4 mmol L-1(NH4)(2) {[}MoS4] in 0.1 moL(-1) NaClO4 solution. The film was characterized from X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and they showed an amorphous structure and high catalytic activity for HER. The Tafel slope was 85 mV dec(-1) and overpotential at -10 mA cm(-2) was -139 mV showing that Ti substrate compared with fluorine-tin doped oxide (FTO) substrate favored the IIER and electroactivity of MoS2 films. (AU)

• Processo FAPESP: 17/12794-2 - Preparação, caracterização e aplicação de filmes de MoS2 e WS2 em fotoeletrocatálise para a produção de hidrogênio
• Beneficiário: Marina Medina da Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 18/16401-8 - Fotocatalisadores e fotoeletrodos para obtenção de combustíveis renováveis
• Beneficiário: Lucia Helena Mascaro Sales
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock
• Beneficiário: Arlene Gonçalves Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia