TY - JOUR
T1 - Dual catalytic functions of biomimetic, atomically dispersed iron-nitrogen doped carbon catalysts for efficient enzymatic biofuel cells
AU - Ji, Jungyeon
AU - Woo, Jinwoo
AU - Chung, Yongjin
AU - Joo, Sang Hoon
AU - Kwon, Yongchai
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - We report that the performance of enzymatic biofuel cell (EBC) can be boosted by exploiting the dual function of iron- and nitrogen-codoped carbon nanotube (Fe–N/CNT) catalysts. The Fe–N/CNT is directly used as a cathode catalyst for oxygen reduction reaction while it is combined with glucose oxidase (GOx) and polyethylenimine (PEI) to form GOx/PEI/[Fe–N/CNT] for catalyzing the overall oxidation reactions including glucose oxidation reaction at the anode. The cathode employing Fe–N/CNT catalyst shows excellent onset potential and current density (0.29 V and of 0.9 mA cm−2). In anode, GOx/PEI/[Fe–N/CNT] shows proper onset potential and current density (0.17 V and 74.3 μA cm−2) with the injection of 8 mM glucose solution. More quantitatively, its Michaelis-Menten constant and maximum current density are 139.4 mM and 347.1 μA cm−2, respectively, and its catalytic activity is well maintained preserving 81.2% of its initial value even after four weeks. The EBC comprising Fe–N/CNT at the cathode and GOx/PEI/[Fe–N/CNT] at the anode exhibits the maximum power density (MPD) of 63 μW cm−2. This is the first report that demonstrates the possibility of the heme mimicking nanocatalyst as both anodic and cathodic catalysts for EBCs.
AB - We report that the performance of enzymatic biofuel cell (EBC) can be boosted by exploiting the dual function of iron- and nitrogen-codoped carbon nanotube (Fe–N/CNT) catalysts. The Fe–N/CNT is directly used as a cathode catalyst for oxygen reduction reaction while it is combined with glucose oxidase (GOx) and polyethylenimine (PEI) to form GOx/PEI/[Fe–N/CNT] for catalyzing the overall oxidation reactions including glucose oxidation reaction at the anode. The cathode employing Fe–N/CNT catalyst shows excellent onset potential and current density (0.29 V and of 0.9 mA cm−2). In anode, GOx/PEI/[Fe–N/CNT] shows proper onset potential and current density (0.17 V and 74.3 μA cm−2) with the injection of 8 mM glucose solution. More quantitatively, its Michaelis-Menten constant and maximum current density are 139.4 mM and 347.1 μA cm−2, respectively, and its catalytic activity is well maintained preserving 81.2% of its initial value even after four weeks. The EBC comprising Fe–N/CNT at the cathode and GOx/PEI/[Fe–N/CNT] at the anode exhibits the maximum power density (MPD) of 63 μW cm−2. This is the first report that demonstrates the possibility of the heme mimicking nanocatalyst as both anodic and cathodic catalysts for EBCs.
KW - Enzymatic biofuel cell
KW - Hydrogen peroxide oxidation reaction
KW - Iron-nitrogen doped carbon
KW - Oxygen reduction reaction
KW - Physiological condition
UR - http://www.scopus.com/inward/record.url?scp=85071777140&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2019.122679
DO - 10.1016/j.cej.2019.122679
M3 - Article
AN - SCOPUS:85071777140
SN - 1385-8947
VL - 381
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 122679
ER -