Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction

Autor(es)

Matias, Tiago A. ^[1] ; Parussulo, Andre L. A. ^[1] ; Benavides, Paola A. ^[1] ; Guimaraes, Robson R. ^[1] ; Dourado, Andre H. B. ^[1] ; Nakamura, Marcelo ^[1] ; Cordoba de Torresi, Susana I. ^[1] ; Bertotti, Mauro ^[1] ; Araki, Koiti ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electrochimica Acta; v. 283, p. 18-26, SEP 1 2018.
• Citações Web of Science: 6

Resumo

A robust polymeric material constituted by chains of binuclear aqua ruthenium terpyridylphenanthroline complexes connected through benzene ring meta-positions, exhibiting an unusual two electrons and two protons PCET (proton-coupled electron transfer) process and enhanced oxygen evolution reaction (OER) activity, is described. The catalytic active {[}Ru-V=O] species is generated at potentials more positive than + 1.5 V (NHE) in the poly-{[}[Ru(H2O)(phen)](2)(tpy(2)ph)] film, as confirmed by the rise of the ruthenyl (Ru-V=O) stretching band at 810 cm(-1) in the Raman spectrum, and the clear change to a higher activity regime as confirmed by EIS. Faradaic efficiency for OER as high as 39% was achieved at +1.8 V, indicating that poly-{[}[Ru(H2O)(phen)](2)(tpy(2)ph)] is one of the most active ruthenium terpyridine complexes ever prepared. The synthesis and characterization of the monomeric binuclear {[}[RuCl(Clphen)](2)(tpy(2)ph)](2+) and its respective {[}[Ru(H2O)(Clphen)](2)(tpy(2)ph)](4+) aqua complex are also fully described. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/24725-4 - Química supramolecular e nanotecnologia
• Beneficiário: Henrique Eisi Toma
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/25592-8 - Estudo da adsorção de L-cisteína e L-cistina sobre eletrodo de platina
• Beneficiário: André Henrique Baraldi Dourado
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 15/26308-7 - Otimização das propriedades físico-químicas de materiais nano-estruturados e suas aplicações em reconhecimento molecular, catálise e conversão/armazenamento de energia
• Beneficiário: Roberto Manuel Torresi
• Modalidade de apoio: Auxílio à Pesquisa - Temático