Preparation method of high-stability Au-Cu/LaMnO3 catalyst
A high stability, catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of life span affecting the application of nano-gold catalysts, poor stability, etc.
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Embodiment 1
[0011] Weigh 4.33gLa(NO 3 ) 3 ·6H 2 O and 2.51gMn(NO 3 ) 2 4H 2 O, and made into a solution, then add 3.84g citric acid (n 柠檬酸 =n La +n Mn ), after stirring evenly at room temperature, dry at 60°C for 40 hours to obtain dry gel, dry at 110°C to obtain gray powder, grind it, and roast at 600°C for 2 hours to obtain the carrier LaMnO 3 . Measure 2mM of HAuC1 4 4H 2 50ml of O solution was placed in a beaker, and 0.01M Cu(NO 3 ) 2 ·3H 2 O solution 10ml, add 1g carrier LaMnO 3 , use 1M NaOH to adjust the pH of the solution to 9, stir magnetically for 2 hours at room temperature, age for 6 hours, wash and filter with deionized water until there is no Cl - , and dried at 60°C for 6h to obtain Au-Cu / LaMnO 3 Catalyst, the theoretical loading of gold catalyst is 2wt%. Catalyst activity evaluation is shown in Table 1.
Embodiment 2
[0013] Weigh 8.66gLa(NO 3 ) 3 ·6H 2 O and 5.02gMn(NO 3 ) 2 4H 2 O, and made into a solution, then add 7.69g citric acid (n 柠檬酸 =n La +n Mn ), after stirring evenly at room temperature, dry at 60°C for 40 hours to obtain dry gel, dry at 110°C to obtain gray powder, grind it, and roast at 550°C for 3 hours to obtain the carrier LaMnO 3 . Measure 2mM of HAuC1 4 4H 2 100ml of O solution was placed in a beaker, and 0.01M Cu(NO 3 ) 2 ·3H 2 O solution 20ml, add 1g carrier LaMnO 3 , use 1M NaOH to adjust the pH of the solution to 10, stir magnetically for 2 hours at room temperature, age for 6 hours, wash and filter with deionized water until there is no Cl - , and dried at 80°C for 6h to obtain Au-Cu / LaMnO 3 Catalyst, the theoretical loading of gold catalyst is 3.7wt%. Catalyst activity evaluation is shown in Table 1.
Embodiment 3
[0015] Weigh 10.8gLa(NO 3 ) 3 ·6H 2 O and 6.28gMn(NO 3 ) 2 4H 2 O, and made into a solution, then add 9.6g citric acid (n 柠檬酸 =n La +n Mn ), stirred evenly at room temperature, dried at 80°C for 40 hours to obtain dry gel, dried at 110°C to obtain gray powder, ground, and roasted at 600°C for 3 hours to obtain the carrier LaMnO 3 . Measure 2mM of HAuC1 4 4H 2 150ml of O solution was placed in a beaker, and 0.01M Cu(NO 3 ) 2 ·3H 2 O solution 100ml, add 1g carrier LaMnO 3 , use 1M NaOH to adjust the pH of the solution to 11, stir magnetically for 2 hours at room temperature, age for 6 hours, wash and filter with deionized water until there is no Cl - , and dried at 60°C for 6h to obtain Au-Cu / LaMnO 3 Catalyst, the theoretical loading of gold catalyst is 5.3wt%. Catalyst activity evaluation is shown in Table 1.
[0016] Table 1 Catalyst evaluation results
[0017]
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