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© 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.The Pt–catalyzed D–glucose oxidation reaction in neutral electrolytes was investigated for implantable power applications. A reaction mechanism involving two possible oxidation pathways, namely direct and OHads–mediated oxidation, was proposed based on the mass change during electrochemical measurement. PtPd and Pt2Pd were synthesized as anodic catalysts by a solvothermal method, and single–chamber glucose–air fuel cells using a neutral aqueous electrolyte were prototyped successfully. Higher fuel cell performance was achieved with the PtPd catalyst, with a maximum power density of 27.6 μW cm–2 and open–circuit voltage of 0.616 V. Collectively, the present study contributes to maximize the performance of glucose fuel cells.
