Construction method of electrocatalytic oxidation methanol fuel cell
A methanol fuel cell, electrocatalytic oxidation technology, applied in the direction of fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of rapid increase in fossil fuel mining, worry about living conditions, and increased mining difficulty, and achieve simple structure , good catalytic effect, low loading effect
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Embodiment 1
[0028] Example 1: Preparation of Electrocatalytic Oxidation Methanol Fuel Cell Electrode
[0029] The Au-Ni-Pt / paper electrode of this embodiment is prepared by the following method:
[0030] (1) Using paper as the substrate, apply the graphene solution on the front of the paper electrode. Then soak the electrode alternately in PDDA and PSS solutions for 3 minutes each, and dry it, repeating 3 times.
[0031] (2) Electrochemical method is used to deposit flower-shaped nano gold on the modified paper electrode: a three-electrode system is adopted, the mixed solution of potassium chloroaurate is the electrolyte solution, the modified paper electrode is the working electrode, and the counter electrode is Platinum electrode, the reference electrode is Ag / AgCl, and the set voltage is -0.2V.
[0032] (3) Preparation of Au-Ni-Pt / paper composite electrode by electrochemical method: using a three-electrode system, NiSO 4 (0.02M) and Na 2 SO 4 (0.1M) mixed solution is the electroly...
Embodiment 2
[0034] Example 2: Construction of electrocatalytic oxidation methanol fuel cell
[0035] The Au-Ni-Pt / paper electrode is used as the anode, and the Pt electrode is used as the cathode; a potassium hydroxide solution with a concentration of 0.1mol / L is added as the electrolyte solution in the anode cell, and methanol with a concentration of 0.1mol / L is added as the fuel. A methanol solution with a concentration of 0.1mol / L and a pH value of 8 to 14 is added to the pool, and oxygen is introduced into the pool, and the two pools are connected with an anion exchange membrane to form an electrocatalytic oxidation methanol fuel cell.
[0036] as attached figure 1 As shown, the prepared anode is connected to the platinum electrode by a wire and inserted into a methanol solution to construct an electrocatalytic oxidation methanol fuel cell.
Embodiment 3
[0037]Example 3: Performance test of electrocatalytic oxidation methanol fuel cell
[0038] Test the performance of the electrocatalytic oxidation methanol fuel cell constructed in Example 2: Using an electrochemical workstation, first connect the circuit, the modified anode is used as the working electrode, the battery cathode is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode. The catalytic activity of the electrode to methanol was tested by cyclic voltammetry. After determining the initial stable potential of the electrode, a suitable termination potential and scanning rate were selected, and the cyclic voltammetry curve of the electrode was obtained by scanning. as attached figure 2 shown. Test the catalytic effect of Au-Ni-Pt electrode in 0mol / L, 0.25mol / L, 0.5mol / L, 0.75mol / L, 1.0mol / L, 1.25mol / L methanol solution at a scanning speed of 50mV / s . as attached image 3 As shown, it can be seen from the figure that with the in...
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