TY - JOUR
T1 - Amide group anchored glucose oxidase based anodic catalysts for high performance enzymatic biofuel cell
AU - Chung, Yongjin
AU - Ahn, Yeonjoo
AU - Kim, Do Heyoung
AU - Kwon, Yongchai
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - A new enzyme catalyst is formed by fabricating gold nano particle (GNP)-glucose oxidase (GOx) clusters that are then attached to polyethyleneimine (PEI) and carbon nanotube (CNT) with cross-linkable terephthalaldehyde (TPA) (TPA/[CNT/PEI/GOx-GNP]). Especially, amide bonds belonging to TPA play an anchor role for incorporating rigid bonding among GNP, GOx and CNT/PEI, while middle size GNP is well bonded with thiol group of GOx to form strong GNP-GOx cluster. Those bonds are identified by chemical and electrochemical characterizations like XPS and cyclic voltammogram. The anchording effect of amide bonds induces fast electron transfer and strong chemical bonding, resulting in enhancements in (i) catalytic activity, (ii) amount of immobilized GOx and (ii) performance of enzymatic biofuel cell (EBC) including the catalyst. Regarding the catalytic activity, the TPA/[CNT/PEI/GOx-GNP] produces high electron transfer rate constant (6 s−1), high glucose sensitivity (68 μA mM−1 cm−2), high maximum current density (113 μA cm−2), low charge transfer resistance (17.0 Ω cm2) and long-lasting durability while its chemical structure is characterized by XPS confirming large portion of amide bond. In EBC measurement, it has high maximum power density (0.94 mW cm−2) compatible with catalytic acitivity measurements.
AB - A new enzyme catalyst is formed by fabricating gold nano particle (GNP)-glucose oxidase (GOx) clusters that are then attached to polyethyleneimine (PEI) and carbon nanotube (CNT) with cross-linkable terephthalaldehyde (TPA) (TPA/[CNT/PEI/GOx-GNP]). Especially, amide bonds belonging to TPA play an anchor role for incorporating rigid bonding among GNP, GOx and CNT/PEI, while middle size GNP is well bonded with thiol group of GOx to form strong GNP-GOx cluster. Those bonds are identified by chemical and electrochemical characterizations like XPS and cyclic voltammogram. The anchording effect of amide bonds induces fast electron transfer and strong chemical bonding, resulting in enhancements in (i) catalytic activity, (ii) amount of immobilized GOx and (ii) performance of enzymatic biofuel cell (EBC) including the catalyst. Regarding the catalytic activity, the TPA/[CNT/PEI/GOx-GNP] produces high electron transfer rate constant (6 s−1), high glucose sensitivity (68 μA mM−1 cm−2), high maximum current density (113 μA cm−2), low charge transfer resistance (17.0 Ω cm2) and long-lasting durability while its chemical structure is characterized by XPS confirming large portion of amide bond. In EBC measurement, it has high maximum power density (0.94 mW cm−2) compatible with catalytic acitivity measurements.
KW - Anchording effect of amide bond
KW - Enzymatic biofuel cell
KW - Gold nano particle
KW - Gold-thiol bond
KW - Terephthalaldehyde
UR - http://www.scopus.com/inward/record.url?scp=84996866086&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2016.10.092
DO - 10.1016/j.jpowsour.2016.10.092
M3 - Article
AN - SCOPUS:84996866086
SN - 0378-7753
VL - 337
SP - 152
EP - 158
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
