Preparation method and catalytic combustion application of boron nitride supported platinum catalyst
A technology of platinum catalyst and boron nitride, which is applied in the field of preparation and its application in the catalytic combustion of methanol, can solve the problems of low catalytic activity and poor shape control, and achieve the effect of simple reaction conditions
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Embodiment 1
[0025] Stir and dissolve 0.62g of boric acid and 6.0g of urea in water, and evaporate to dryness to obtain the precursor powder; place the precursor powder in a nitrogen tube furnace, heat up to 240°C for 2 hours at 10°C / min; then raise the temperature to 900°C ℃ reaction for 4h, the morphology of the obtained product is as follows figure 1 As shown; 0.1g powder was added to 1.3mg, 1mL methanol solution of chloroplatinic acid, soaked for 6h, and dried at 120°C to obtain the catalyst powder to be reduced; the methanol was introduced into the reduction device by air bubbling method, and the air flow rate was 150mL / min to 250mL / min, and reduced at 150°C for 2h to obtain a platinum catalyst loaded with 0.5wt%.
Embodiment 2
[0027] Stir and dissolve 0.62g of boric acid and 12g of urea in water, and evaporate to dryness to obtain the precursor powder; place the precursor powder in a nitrogen heating furnace, heat up to 280°C at 10°C / min and keep it for 2 hours; react at 900°C 8h, the morphology of the obtained product is as follows figure 2 As shown; 0.1g powder was added to 2.6mg, 1mL methanol solution of chloroplatinic acid, soaked for 8h, and dried at 120°C to obtain the catalyst powder to be reduced; the methanol was introduced into the reduction device by air bubbling method, and the air flow rate was 150mL / min to 250mL / min (the air flow rate is preferably 200mL / min), and reduce at 150°C for 2h to obtain a platinum catalyst with a loading of 1.0wt%.
Embodiment 3
[0029] Stir and dissolve 0.62g of boric acid and 17g of urea in water, and evaporate to dryness to obtain the precursor powder; place the precursor powder in a nitrogen tube furnace, heat up to 300°C for 2 hours at 10°C / min; then raise the temperature to 950°C React for 4 hours; add 0.1g powder to 4.0mg, 1mL methanol solution of chloroplatinic acid for 8 hours, and dry at 120°C to obtain the catalyst powder to be reduced; use air bubbling method to introduce methanol into the reduction device, and the air flow rate is 150mL / min to 250mL / min, 150°C reduction for 2h, a platinum catalyst loaded with 1.5wt% was obtained, and its morphology was as follows image 3 shown.
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