Abstract
Direct electron transfer characteristics of hemoglobin (Hb) molecules were enhanced on indium-tin oxide (ITO) electrodes synthesized by using a dip-coating solution with a molar ratio of In:Sn = 1:1. The quantity of electrochemically active Hb was estimated to be 222 pmol cm-2 from cyclic voltammetry in a pH 7.4 phosphate buffered saline (PBS) solution. In addition, the Hb exhibited oxygen reduction reaction (ORR) activity in O2 saturated PBS solution at negative potential range from around -0.15 V vs. Ag|AgCl|KCl(satd.). The ORR current reached to 90 mA cm-2 at -0.45 V vs. Ag|AgCl|KCl(satd.). A single cell with the O2|Hb|ITO cathode showed an open circuit voltage of ca. 0.72 V and a maximum power density of ca. 1.1 mW cm-2.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
