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Keywords:

  • electrocatalysis;
  • electrochemistry;
  • graphene;
  • impurities;
  • oxidation

Abstract

Thermally and chemically reduced graphene materials contain significant amounts of carbonaceous impurities that are similar in structure to amorphous carbon. Herein, we show that the claimed electrocatalytic activities of these materials for the oxidation of NADH, acetaminophen, and hydroquinone are mainly due to the presence of carbonaceous impurities.