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Preparation and Performance of Enzymatic Biofuel Cell

Author: ZhangGuiRong
Tutor: ZhangZuo
School: Shantou University
Course: Applied Chemistry
Keywords: Enzyme biofuel cell Polymer modified electrode Unipolar chamber enzyme fuel cell Triple enzymes biofuel battery
CLC: TM911.4
Type: Master's thesis
Year: 2008
Downloads: 402
Quote: 0
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Abstract

Enzyme biofuel cells using biocatalyst enzymes to chemical energy directly into electricity, is a clean, efficient, quiet running electrochemical engine, with a wide range of fuel sources, mild reaction conditions, biocompatibility, is a renewable green energy. Enzyme biofuel cell research has focused on a new method to find a fixed enzyme and test the performance of the battery discharge. This article details the preparation of the enzyme electrode method, research unipolar room and a \Polymer modified electrode has a three-dimensional structure, there are a large number of electrical activity center in the film, is very conducive to the electro-catalytic. The preparation method is simple, the electrode life is long, and thus can be widely used. This article was the preparation of the polymer film modified electrode, this chemical modification of the electrode applied to the enzyme in the bio-fuel cell anode, to act as an immobilized enzyme electrode of the electron mediator role. This paper studies the work are as follows: 1. Cyclic Voltammetry prepared poly methylene green modified electrode (PMG / CME) of the modified electrode electrochemical polymerization process, characterization, the cyclic voltammetry nature and modified electrodes for NADH the electrocatalytic special role was found the PMG / CME Electrocatalysis of NADH, with satisfactory results. 2 Preparation of the the monopole chamber enzyme biofuel cell. The anode electrochemical deposition method immobilized ADH-NAD ~, the cathode still using the traditional method, the Pt / C catalyst of the carbon paper, a cathode and a proton exchange membrane thermocompression together the assembly the monopole chamber enzyme biofuel cell. Using ethanol as an anode and a cathode of the fuel and pure oxygen, respectively, ADH-NAD to an enzyme as a catalyst for the catalytic oxidative dehydrogenation of fuel ethanol. Experimental results show that the electrochemical deposition method unipolar chamber enzyme fuel cell maximum open circuit voltage reaches 735mV. Outer resistive load 3kΩ, the stability of the battery output voltage is 395 mV, and the stability of the battery output power density reached 62.4μW/cm 2. The working life of the enzyme during intermittent use as much as two months. New design of an enzyme electrode having a three-layer structure: a first layer of poly methylene green (PMG) film and a mixed solution of NAD ~; second layer for the PMG film; third layer containing an ion adsorption type immobilized enzyme (immobilization of ADH), which together are assembled into \With ethanol and oxygen, respectively as the anode and the cathode of the fuel, a series of electrochemical performance of the \2, a stable output voltage of about 425 mV, the stability of the output power density of the battery 2 of is reached 72.3μW/cm to be open circuit voltage maximum can reach 630 mV. The results showed that this immobilized enzyme method is conducive to enzyme biofuel cell electron transfer.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Chemical power sources,batteries, fuel cells > Fuel cell
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