Abstract
Anodic intercalation-deintercalation of 18 M sulfuric acid into chromium trioxide-graphite intercalation compounds (CrO 3-GICs) is examined in comparison with the process occurring for pure graphite. Distinct differences in the influence of the CrO 3 dissolved in acid and intercalated into graphite on the intercalation process of H 2SO 4 are demonstrated by means of galvanostatic and cyclic potentiodynamic methods. The proposed model of intercalation of H 2SO 4 into CrO 3-GICs concerns both electrochemical process and chemical reactions involving the CrO 3 intercalant. To account for surprising effects found in the curves recorded for CrO 3-GICs the changes proceeding from the structural and chemical properties of these compounds because of intercalation of sulfuric acid are considered.
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