Preparation method of acid-etched Ni, Co, Fe ternary metal hydroxide oxygen evolution catalyst
A ternary metal and hydroxide technology, applied in the field of Fe ternary metal hydroxide oxygen evolution catalyst, Co, and Ni involving acid etching, can solve problems such as unreported methods, and achieve simple and easy-to-implement process, process The effect of good repeatability, easy scale-up and industrial production
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Embodiment 1
[0014] Take by weighing 5.463g nickel nitrate (H 12 N 2 NiO 12 ) and 2.517g ferric nitrate (H 18 FeN 3 o 18 ) and 0.604g cobalt nitrate (CoH 12 N 2 o 12 ) was dissolved in 30mL deionized water, 2.304g sodium hydroxide (NaOH) and 2.544g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 30 mL of deionized water, and then the two solutions were mixed and stirred vigorously, and reacted under hydrothermal conditions at 80°C for 48h, and the obtained precipitate was centrifuged and dried at 60°C for 24h to obtain the desired precursor. Weigh 200 mg of the precursor, dissolve it in deionized water and stir thoroughly, and add 2.0 mL of -1 nitric acid, stirred at room temperature for 30 min, washed by centrifugation, and dried at 60°C for 24 h. The acid-etched Ni, Co, Fe ternary metal hydroxide high-performance oxygen evolution catalyst is obtained. Electrochemical tests show that its current density reaches 10mA cm -2 , the overpotential is only 184mV, and the Tafel slop...
Embodiment 2
[0016] Take by weighing 5.463g nickel nitrate (H 12 N 2 NiO 12 ) and 2.517g ferric nitrate (H 18 FeN 3 o 18 ) and 0.604g cobalt nitrate (CoH 12 N 2 o 12 ) was dissolved in 30mL deionized water, 2.304g sodium hydroxide (NaOH) and 2.544g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 30 mL of deionized water, and then the two solutions were mixed vigorously and stirred at 80 ° C for 48 h, and the obtained precipitate was centrifuged and dried at 60 ° C for 24 h to obtain the desired precursor. Weigh 200 mg of the precursor, dissolve it in deionized water and stir thoroughly, and add 1.0 mL of -1 nitric acid, stirred at room temperature for 30 min, washed by centrifugation, and dried at 60°C for 24 h. The acid-etched Ni, Co, Fe ternary metal hydroxide high-performance oxygen evolution catalyst is obtained. Electrochemical tests show that its current density reaches 10mA cm -2 , the overpotential is only 184mV, and the Tafel slope is relatively small at 37.8mV·dec ...
Embodiment 3
[0018] Take by weighing 5.463g nickel nitrate (H 12 N 2 NiO 12 ) and 2.517g ferric nitrate (H 18 FeN 3 o 18 ) and 0.604g cobalt nitrate (CoH 12 N 2 o 12 ) was dissolved in 30mL deionized water, 2.304g sodium hydroxide (NaOH) and 2.544g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 30 mL of deionized water, and then the two solutions were mixed vigorously and stirred at 80 ° C for 48 h, and the obtained precipitate was centrifuged and dried at 60 ° C for 24 h to obtain the desired precursor. Weigh 200 mg of the precursor, dissolve it in deionized water and stir thoroughly, and add 2.0 mL of -1 nitric acid, stirred at room temperature for 30 min, washed by centrifugation, and dried at 60°C for 24 h. The acid-etched Ni, Co, Fe ternary metal hydroxide high-performance oxygen evolution catalyst is obtained. Electrochemical tests show that its current density reaches 10mA cm -2 , the overpotential is only 184mV, and the Tafel slope is relatively small at 37.8mV·dec ...
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