Application of N-doped graphene modified carbon ionic liquid electrode for direct electrochemistry of hemoglobin


Nitrogen-doped graphene (NG) was synthesized and used for the investigation on direct electrochemistry of hemoglobin (Hb) with a carbon ionic liquid electrode as the substrate electrode. Due to specific characteristics of NG such as excellent electrocatalytic property and large surface area, direct electron transfer of Hb was realized with enhanced electrochemical responses appearing. Electrochemical behaviors of Hb on the NG modified electrode were carefully investigated with the electrochemical parameters calculated. The Hb modified electrode exhibited excellent electrocatalytic reduction activity toward different substrates, such as trichloroacetic acid and H2O 2, with wider dynamic range and lower detection limit. These findings show that NG can be used for the preparation of chemically modified electrodes with improved performance and has potential applications in electrochemical sensing.


Physics, Astronomy, and Materials Science

Document Type




Carbon ionic liquid electrode, Direct electrochemistry, Hemoglobin, N-doped graphene

Publication Date


Journal Title

Materials Science and Engineering C