A kind of high-performance fuel cell catalyst and preparation method thereof
A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high price, increased fuel cell cost, lack of Pt resources, etc., and achieves convenient operation, improved catalyst activity and stability, and superior performance. Effect
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Embodiment 1
[0045] Weigh 140g of carbon black and place it in 50ml of absolute ethanol, after ultrasonication for 60 minutes, add 300mg of sodium citrate to the mixed liquid, and ultrasonication for 30min. Then, 0.9 mmol of titanium isopropoxide was added to the mixed liquid and ultrasonicated for 30 min. Continue to add 2ml of 1mol / L lithium triethyl borohydride to the mixed liquid, and then add 0.1mmol of sodium chloroaurate after ultrasonic reaction for 30 minutes, and ultrasonic for 60 minutes. The mixed liquid was centrifuged, filtered, washed with deionized water, and then dried in a vacuum oven. figure 1 Scanning Transmission Microscopy-Electron Energy Loss Spectroscopy (STEM-EELS) element content surface scanning map of TiO2-modified Au nanoparticles, from figure 1 It can be seen that in the titanium dioxide-modified gold nanoparticles prepared by the method, titanium is distributed on the surface of the gold nanoparticles, and concentrates on the edges and corners of the gold na...
Embodiment 2
[0047] Weigh 140g of carbon black and place it in 50ml of absolute ethanol, after ultrasonication for 60 minutes, add 300mg of sodium citrate to the mixed liquid, and ultrasonication for 30min. Then, 0.3 mmol of titanium isopropoxide was added to the mixed liquid and ultrasonicated for 30 min. Continue to add 2ml of 1mol / L lithium triethyl borohydride to the mixed liquid, react for 30min, add 0.1mmol of sodium chloroaurate, and sonicate for 60min. The mixed liquid was centrifuged, filtered, washed with deionized water, and then dried in a vacuum oven. Finally, the underpotential deposition method is used to deposit a single layer of copper on the surface of the prepared gold nanoparticles, and no deposition occurs on the surface of titanium dioxide, and then it is placed in a solution containing a platinum salt to undergo a displacement reaction, so that the copper is replaced by platinum to form a single layer. Platinum, repeating this step can also deposit double-layer plat...
Embodiment 3
[0049] Weigh 140g of carbon black and place it in 50ml of absolute ethanol, after ultrasonication for 60 minutes, add 300mg of sodium citrate to the mixed liquid, and ultrasonication for 30min. Then add 0.8 mmol of vanadium dichloride to the mixed liquid, and ultrasonicate for 30 min. Continue to add 3ml of 1mol / L lithium triethyl borohydride to the mixed liquid, and then add 0.14mmol of sodium chloroaurate after ultrasonic reaction for 60 minutes, and ultrasonic for 60 minutes. The mixed liquid was centrifuged, filtered, washed with deionized water, and then dried in a vacuum oven. Finally, the underpotential deposition method is used to deposit a single layer of copper on the surface of the prepared gold nanoparticles, and no deposition occurs on the surface of vanadium oxide, and then it is placed in a solution containing a platinum salt to undergo a displacement reaction, so that the copper is replaced by platinum to form a single layer. Repeating this step can also depos...
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