Enhancement of organophosphate degradation by electroactive pyrrole and imidazole copolymers
Hryniewicz, Bruna (Universidade Federal do Paraná. Departamento de Química)
Wolfart, Franciele (Instituto Federal Farroupilha)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)
Orth, Elisa (Universidade Federal do Paraná. Departamento de Química)
Vidotti, Marcio (Universidade Federal do Paraná. Departamento de Química)

Data:	2020
Resum:	Many chemical warfare agents and agrochemicals are composed by organophosphates, that present high toxicity and difficult spontaneous degradation. Amongst the different catalysts to degrade these compounds, heterogeneous systems stand out since they provide easy recovery of the catalyst. However, the limited diffusion of the substrate decreases the rate of the reactions when compared to homogeneous catalysis. To reach a good efficiency in the dephosphorylation, we created heterogeneous catalysts based on pyrrole and imidazole that can enhance the degradation by different effects; both catalytic activity of imidazole and electroactivity of polypyrrole were evaluated. Spectroelectrochemical studies evidenced that the rate constant changes with the applied potential, indicating different reaction mechanisms with the material in the oxidized and neutral states. In summary, a new perspective allying conducting polymers with chemical catalysts was explored. This cooperative effect should be considered in future works concerning the search for new materials to monitor and eliminate organophosphates.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Pyrrole ; Imidazole ; Organophosphate degradation ; Impedance spectroscopy ; Spectroelectrochemistry
Publicat a:	Electrochimica acta, Vol. 338 (january 2020) , p. 135842, ISSN 1873-3859

DOI: 10.1016/j.electacta.2020.135842

Preprint 29 p, 1.2 MB

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