A hybrid biofuel cell based on electrooxidation of glucose using ultra-small silicon nanoparticles.
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 (-0.62 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 microW/cm(2) 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.
Department of Electrical and Computer Engineering, Cleveland State University, Cleveland, OH 44115, USA.
Yongki
Y
Choi
Gang
G
Wang
Munir H
MH
Nayfeh
Siu-Tung
ST
Yau
D001674:Bioelectric Energy Sources; D001698:Biomedical Engineering; D055664:Electrochemical Techniques; D005947:Glucose / Q000737:chemistry*; D053758:Nanoparticles; D010084:Oxidation-Reduction; D012825:Silicon
D005947:Glucose; D012825:Silicon