Abstract
We describe an enzymatic fuel cell (EFC) that can electrooxidize glucose completely. the EFC contains the hybrid Ni@Pt-CNT/OxOx bioanode, composed of a bimetallic composite catalyst (Ni@Pt-CNT) and the enzyme oxalate oxidase (OxOx), which can cleave carbon-carbon bonds. Ni@Pt-CNT/OxOx displayed 3-fold higher catalytic activity in the presence than in the absence of glucose (1.3 and 0.4 mA cm−2, respectively), indicating that Ni@Pt-CNT and OxOx acted synergistically. Electrochemical impedance spectroscopy showed that Ni@Pt-CNT/OxOx had higher charge transfer resistance and double layer capacitance than Ni@Pt-CNT. Long-term bulk electrolysis (18 h) revealed that the EFC operating with Ni@Pt-CNT/OxOx presented better current density and stability than the electrochemical cell operating with Ni@Pt-CNT, so deep glucose electrooxidation generated energy. the glucose oxidation products detected by HPLC-UV/RID confirmed that glucose was fully electrooxidized, and that 24 electrons were harvested from it. the hybrid Ni@Pt-CNT/OxOx bioanode developed herein could be used in cascade reactions, to provide an EFC with promising application in self-powered electronic devices.
Recommended Citation
J. H. Franco et al., "Development of an Enhanced Hybrid Bi-Catalytic Electrode Containing Bimetallic Composite Catalyst and Immobilized Enzyme for Complete Glucose Electrooxidation," Biosensors and Bioelectronics: X, vol. 14, article no. 100354, Elsevier, Sep 2023.
The definitive version is available at https://doi.org/10.1016/j.biosx.2023.100354
Department(s)
Chemistry
Publication Status
Open Access
Keywords and Phrases
Enzymatic biofuel cell; Glucose; Hybrid system; Metallic catalyst; Oxalate oxidase
International Standard Serial Number (ISSN)
2590-1370
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 Sep 2023
Comments
Fundação de Amparo à Pesquisa do Estado de São Paulo, Grant W911NF-14-1-0263