A hybrid biofuel cell based on electrooxidation of glucose using ultra-small silicon nanoparticles

Yongki Choi, Gang Wang, Munir H. Nayfeh, Siu Tung Yau

Research output: Contribution to journalArticlepeer-review

Abstract

The ultra-small silicon nanoparticle was shown to be an electrocatalyst for the electrooxidation of glucose. The oxidation appeared to be a first order reaction which involves the transfer of 1 electron. The oxidation potential showed a low onset of -0.4 V vs. Ag/AgCl (-0.62 V vs. RHE). The particle was used as the anode catalyst of a prototype hybrid biofuel cell, which operated on glucose and hydrogen peroxide. The output power of the hybrid cell showed a dependence on the enzymes used as the cathode catalyst. The power density was optimized to 3.7 μW/cm2 when horseradish peroxidase was replaced by microperoxidase-11 (MP-11). Comparing the output power of the hybrid cell to that of a biofuel cell indicates enhanced cell performance due to the fast reaction kinetics of the particle. The long-term stability of the hybrid cell was characterized by monitoring the cell voltage for 5 days. It appeared to that the robustness of the silicon particle resulted in more cell stability compared to the long-term performance of a biofuel cell.

Original languageEnglish (US)
Pages (from-to)3103-3107
Number of pages5
JournalBiosensors and Bioelectronics
Volume24
Issue number10
DOIs
StatePublished - Jun 15 2009

Keywords

  • Biofuel cell
  • Electrocatalyst
  • Hybrid fuel cell
  • Nanoparticle

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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