A kind of anode constructs the method for starch fuel cell
A fuel cell and starch technology, applied in aqueous electrolyte fuel cells, battery electrodes, circuits, etc., can solve problems such as inability to provide current, insufficient enzyme tolerance, and limited applications, and achieve good catalytic effect, stable structure, and high sensitivity Effect
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Embodiment 1
[0023] Example 1 Comparison of cyclic voltammetry curves of starch solution and blank solution
[0024] First, the three-electrode system was placed in a KOH solution with a pH of 14 and a concentration of 1 mol / L, and cyclic voltammetry was used to scan in the potential range of -0.2 to 1.3 V, and the cyclic voltammetry curve of the blank solution was recorded; then , the three-electrode system was placed in a 10 mmol / L starch test solution containing 1 mol / L KOH solution with a pH of 14 as a supporting electrolyte, and cyclic voltammetry was used to scan in the potential range of -0.2 to 1.3 V. The cyclic voltammetry of starch was recorded. as attached figure 2 Shown: The catalytic effect of PdNFs / FeNPs / mesoporous nickel foam electrode at 10 mmol / L starch was tested at a scanning speed of 100 mV / s. It can be seen from the figure that the catalytic current of PdNFs / FeNPs / mesoporous nickel foam electrode to starch is 1,000,000 μA / cm 2 / mol. It is shown that the fuel compo...
Embodiment 2
[0025] Example 2 Cyclic voltammetric responses of PdNFs / FeNPs / mesoporous nickel foam electrodes to different starch concentrations of the same concentration The three-electrode system was placed in 1 mol / L KOH solution with pH of 14 as the supporting electrolyte for different concentrations of starch to be tested. 1 mmol / L, 3 mmol / L, 5 mmol / L, 7 mmol / L and 10 mmol / L starch solutions were measured at a scan rate of 50 mV / S, and cyclic voltammetry was used to perform the measurement in the potential range of -0.2 to 1.3 V. scanning. The cyclic voltammetry curves of starch with different concentrations and scan rates were recorded. as attached image 3 , attached Figure 4 Shown: It can be seen from the figure that as the concentration increases, the oxidation current of the nano-electrode in starch solution also increases, and the oxidation peak also increases, showing a good linear response of catalyzing starch. Redox reactions are controlled by diffusion. There is a good l...
Embodiment 3
[0026] Example 3 Determination of anti-poisoning ability of electrodes
[0027] First, the three-electrode system was placed in a 10 mm starch test solution containing 1 mol / L KOH solution with a pH of 14 as a supporting electrolyte, and the time-current curve of starch was recorded at a potential of 0.65 V using the time-amperometry method. as attached Figure 5 Shown: The current density drops sharply at the beginning. At the beginning of the reaction, it is a fast kinetic reaction, so the active site does not contain adsorbed starch molecules. After that, the adsorption of new starch molecules depends on the release of electrocatalytic sites through starch oxidation, or the formation of intermediate species such as CO, CHx, etc. in the first few minutes (rate-determining step), and the electrode catalytically active sites are occupied. Therefore, the slightly lower current density is mainly due to the poisoning of the catalyst. Furthermore, the specific current experienc...
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