An octapod-permeable frame structure alloy electrocatalyst and its preparation method
A framework structure, electrocatalyst technology, applied in the fields of nanotechnology and fuel cells, to achieve the effect of good reproducibility, excellent physical and chemical properties, good electrochemical activity and stability
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Embodiment 1
[0045] (1) Preparation of precursor solution
[0046] Weigh platinum acetylacetonate, copper acetylacetonate, and cetyltrimethylammonium bromide at a molar ratio of 1:5:2, and add them to a serum bottle containing 10 ml of oleylamine, and the platinum ion concentration is 5 mmol at this time. / Lift. After transferring to an oil bath and stirring at 60° C. for 30 minutes, a uniform and transparent green precursor solution was obtained.
[0047] (2) One-step synthesis of octapod-permeable framework alloy catalysts by solvothermal method
[0048] Transfer the precursor solution obtained in step (1) to a polytetrafluoroethylene kettle with a capacity of 25 ml, seal it tightly with stainless steel, and transfer it to an oil bath kept at 170°C. After 24 hours of reaction, it was cooled to room temperature.
[0049] (3) Preparation of supported octapod-permeable framework alloy electrocatalysts
[0050] Add absolute ethanol, centrifuge at 4000 rpm and wash with a mixed solution o...
Embodiment 2
[0058] The octapod-permeable framework alloy electrocatalyst prepared in Example 1 was used to prepare an electrode for the characterization of oxygen reduction performance. The specific steps are to weigh 5 mg of the loaded octapod-permeable framework alloy electrocatalyst prepared in step (5) and add it to 2 ml of absolute ethanol for 30 minutes of ultrasonic vibration to disperse evenly. liter drop on the glassy carbon electrode, after drying at room temperature, absorb 0.5 microliter Nafion solution with a mass percent content of 0.1% and drop it on the catalytic thin layer. Use this as the working electrode, use the platinum plate electrode and the reversible hydrogen electrode as the counter electrode and the reference electrode respectively, and the electrolyte solution is a 0.1 mol / liter perchloric acid solution saturated with oxygen at a speed of 1600 rpm and a temperature of 25 °C with a scan rate of 10 mV / s. The measured curve is image 3 Curve 1 in . Curve 2 is ...
Embodiment 3
[0060] The octapod-permeable framework alloy electrocatalyst prepared in Example 1 was used to prepare an electrode for the characterization of methanol oxidation performance. The specific steps are to weigh 5 mg of the loaded octapod-permeable framework alloy electrocatalyst prepared in step (5) and add it to 2 ml of absolute ethanol for 30 minutes of ultrasonic vibration to disperse evenly. liter drop on the glassy carbon electrode, after drying at room temperature, absorb 0.5 microliter Nafion solution with a mass percent content of 0.1% and drop it on the catalytic thin layer. Take this as the working electrode, use platinum sheet electrode and saturated calomel (SCE) electrode as counter electrode and reference electrode respectively, in 0.5 mol / L sulfuric acid and 1 mol / L methanol solution, the scan rate is 50 mV / sec, the scanning range is -0.2~1 volts (relative to the saturated calomel electrode) for cyclic voltammetry scanning, and the alcohol oxidation catalytic acti...
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