Journal
CHEMICAL ENGINEERING JOURNAL
Volume 429, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132148
Keywords
Glucose oxidase; Polypyrrole; Enzyme nanocapsule; Enzymatic biofuel cells; Surface chemistry
Categories
Funding
- National Natural Science Foundation of China [51873106]
- Shanghai Municipal Government [18JC1410800]
- Interdisciplinary Program of Shanghai Jiao Tong University [YG2021QN62]
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By constructing a conductive enzyme nanocapsule with a protective shell and conductive pathways, the enzyme's conductivity and stability were improved, leading to enhanced electron transfer and enzymatic stability.
Lacking of electron flow pathway within enzymes, enzymatic biofuel cells (EBFCs) always suffer from low power and poor stability, which limits their further application. Aiming to improve enzyme's conductivity and stability, we constructed a conductive enzyme nanocapsule n(GOx-PPy). A self-encapsulation was triggered by adding glucose to initiate an in-situ growth of PPy network within and around the glucose oxidase (GOx). Conductive pathways, as well as protective shell, were formed between single GOx active site and PPy network, allowing enhanced electron transfer and enzymatic stability. The n(GOx-PPy)-based EBFC demonstrated 245-fold increased power output, providing a promising strategy for constructing high-performance EBFCs.
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