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 −0.4V vs. Ag/AgCl (−0.62V 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 3.7μW/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.
A Hybrid Biofuel Cell Based on Electrooxidation of Glucose Using Ultra-Small Silicon NanoparticlesBiosensors & Bioelectronics
Publisher's StatementNOTICE: this is the author’s version of a work that was accepted for publication in Biosensors & Bioelectronics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Biosensors & Bioelectronics, 24, 10, (06-15-2009); 10.1016/j.bios.2009.03.032
Citation InformationChoi, Y., Wang, G., Nayfeh, M. H., , & Yau, S. (2009). A hybrid biofuel cell based on electrooxidation of glucose using ultra-small silicon nanoparticles. Biosensors and Bioelectronics, 24(10), 3103-3107. doi:10.1016/j.bios.2009.03.032