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Different mass ratios of polypyrrole (PPy) to graphene hydrogel (GH) nanocomposites were synthesized by hydrothermal reduction of graphene oxide and chemically oxidative polymerization of pyrrole, forming a three-dimensional framework of PPy wrapped on the surface of GH without adding any toxic reductive agents. Electrochemical tests show that PPy/GH 15 nanocomposite exhibits unique electrochemcial...
The semiconductive properties and pitting susceptibility of passive films formed on carbon steel in synthetic carbonated concrete pore solution containing Cl − ions were studied by Mott–Schottky (M–S) plots and electrochemical noise (EN). The results show that both nitrite and tetraethylenepentamine (TEPA) can reduce the donor density in passive film, leading to a more positive film breakdown...
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