Co (at) Pt core-shell type fuel cell catalyst with Au doped on subsurface layer and preparation method of Co (at) Pt core-shell type fuel cell catalyst
A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient membrane electrode life, poor catalyst stability, and increased platinum consumption, so as to improve activity and platinum utilization, and reduce the use of platinum The effect of increasing the volume and improving the utilization rate
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Embodiment 1
[0042] refer to figure 1 , this embodiment provides a preparation method of a subsurface layer doped Au Co@Pt core-shell fuel cell catalyst, which specifically includes the following steps:
[0043] Preparation of S1.Co / C core: firstly weigh 550mg of cobalt chloride hexahydrate and 800mg of carbon carrier into a beaker, then add 100mL of deionized water into it, mix thoroughly with stirring, and then dry the water in an oven , put the dried powder into a porcelain boat, put it into a tube furnace, pass in hydrogen, heat it up to 250 ° C, and keep it at this temperature for 2 hours to obtain Co / C core powder, the SEM image of which is shown in image 3 .
[0044]S2. Preparation of Co@Au@Pt / C catalyst: take 800 mg of the powder prepared in step S1, add 200 mL of deionized water after deoxygenation, and mix the solution uniformly by ultrasonication, and slowly add 0.16 mL under stirring Chloroauric acid solution (concentration of 0.02 g / mL), Au element was reduced to the surfac...
Embodiment 2
[0046] refer to figure 1 , this embodiment provides a preparation method of a subsurface layer doped Au Co@Pt core-shell fuel cell catalyst, which specifically includes the following steps:
[0047] Preparation of S1.Co / C inner core: firstly weigh 500mg of cobalt chloride hexahydrate and 700mg of carbon carrier into a beaker, then add 100mL of deionized water into it, mix thoroughly with stirring, and then dry the water in an oven , put the dried powder into a porcelain boat, put it into a tube furnace, pass in hydrogen, heat it up to 200 °C, and keep it at this temperature for 1 h to obtain Co / C core powder.
[0048] S2. Preparation of Co@Au@Pt / C catalyst: take 500 mg of the powder prepared in step S1, add 200 mL of deionized water after deoxygenation, and mix the solution uniformly by ultrasonication, and slowly add 0.3 mL under stirring Chloroauric acid solution (concentration of 0.01 g / mL), Au element was reduced to the surface of the cobalt core by displacement reaction,...
Embodiment 3
[0050] refer to figure 1 , this embodiment provides a preparation method of a subsurface layer doped Au Co@Pt core-shell fuel cell catalyst, which specifically includes the following steps:
[0051] Preparation of S1.Co / C core: firstly weigh 600mg of cobalt chloride hexahydrate and 1000mg of carbon support in a beaker, then add 100mL of deionized water into it, mix thoroughly under stirring, and then dry the water in an oven , put the dried powder into a porcelain boat, put it into a tube furnace, pass hydrogen, heat it up to 500 ℃, and keep it at this temperature for 4 hours to obtain Co / C core powder.
[0052] S2. Preparation of Co@Au@Pt / C catalyst: Take 1000 mg of the powder prepared in step S1, add 200 mL of deionized water after deoxygenation, and mix the solution uniformly by ultrasonication, and slowly add 0.13 mL under stirring Chloroauric acid solution (concentration of 0.03 g / mL), Au element was reduced to the surface of the cobalt core by displacement reaction, and...
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Abstract
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