COVID-19 and stroke: a thromboembolic hypothesis
AUTOR(ES)
Castro, Renata R. T.; Silveira Neto, João Giffoni da; Castro, Roberta R. T.; Nascimento, Jacqueline Stephanie Fernandes do; Nascimento, Janie Kelly Fernandes do; Nunes, Nicolle dos Santos Moraes; Orsini, Marco
FONTE
Rev. Assoc. Med. Bras.
DATA DE PUBLICAÇÃO
2020-11
RESUMO
A new nickel based layered double hydroxide nanomaterial, Ni0.8Ce0.2-LDH, constituted by about 3 nm large nanoparticles exhibiting enhanced electrocatalytic properties towards oxidation of glycerol in alkaline media, was prepared by incorporation of 20 wt.% of CeIII ions into α-nickel hydroxide. This can be oxidized to CeIV, as demonstrated by X-ray photoelectron spectroscopy, a much electron withdrawing and oxidizing species responsible for electronic interactions and additional electrocatalytic active sites giving rise to synergic effects. High-resolution transmission electron microscopy images and the X-ray diffractograms indicated a material with a significantly lower size and degree of crystallinity than α-Ni(OH)2, one of the factors contributing to its enhanced electrochemical and electrocatalytic activity, as demonstrated by cyclic voltammetry and electrochemical impedance spectroscopy, suggesting a good potentiality for development of glycerol fuel cells.