Method for preparing load type double-metal catalyst by reducing atmospheric cold plasmas
A bimetallic catalyst, cold plasma technology, applied in the fields of material preparation and catalysis science, can solve the problem of difficult to reduce metal ions, and achieve the effects of easy operation, environmental friendliness and strong reducing ability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0025] γ-Al 2 o 3 for the carrier, at 500 o Calcined at C for 3 h, impregnated with Cu(NO 3 ) 2 solution, standing for 24 h, 100 o C dried for 2 h. Precursors of supported copper catalysts were obtained. Take 0.3 g of the precursor sample and put it into the plasma reactor, using the mixed gas of hydrogen and argon as the working gas (the total gas flow rate is 100 ml min -1 , the ratio of hydrogen to argon is 1:1), using atmospheric pressure dielectric barrier discharge cold plasma for reduction, adjusting the peak-to-peak sinusoidal AC discharge voltage to 32 kV, and the reduction time to 15 min, to obtain 2% Cu / Al 2 o 3 catalyst. Its XRD spectrum is as figure 1 shown. like figure 1 It can be seen that the plasma method can reduce the supported gold ions prepared by the impregnation method to Cu simple substance. Take 10 mg of the sample, put it into a reaction tube with an inner diameter of 4 mm, and inject 20 ml min -1 CO standard gas (CO: O 2 : N 2 =1: 20: ...
Embodiment 2
[0027] γ-Al 2 o 3 for the carrier, at 500 o Calcined at C for 3 h, impregnated with Pd(NO 3 ) 2 solution, standing for 24 h, 100 o C dried for 2 h. Obtain the precursor of supported palladium catalyst. Take 0.3 g of the precursor sample and put it into a plasma reactor, and use the same conditions as in Example 1 to perform plasma reduction for 15 min to obtain 2%Pd / Al 2 o 3 catalyst. Its XRD spectrum is as figure 1 shown. like figure 1 It can be seen that the plasma method can reduce the supported gold ions prepared by the impregnation method to Pd simple substance. Get 10 mg of this sample, adopt the same conditions as in Example 1, carry out the CO oxidation activity test, the result is as follows figure 2 express. Depend on figure 2 It can be seen that the plasma method prepares 2%Pd / Al 2 o 3 Samples at 145 o C conditions can completely oxidize carbon monoxide to carbon dioxide.
Embodiment 3
[0029] γ-Al 2 o 3 for the carrier, at 500 o Calcined at C for 3 h, impregnated with Cu(NO 3 ) 2 with Pd(NO 3 ) 2 The mixed solution, let stand for 24 h, 100 o C dried for 2 h. Precursors of supported bimetallic catalysts were obtained. Take 0.3 g of the precursor sample and put it into the plasma reactor, and use the same conditions as in Example 1 to perform plasma reduction for 15 min to obtain 2%Pd-Cu / Al 2 o 3 catalyst. Its XRD spectrum is as figure 1 shown. like figure 1 It can be seen that the plasma method can reduce the supported gold ions prepared by the impregnation method to Pd and Cu simple substances. Get 10 mg of this sample, adopt the same conditions as in Example 1, carry out the CO oxidation activity test, the result is as follows figure 2 express. Depend on figure 2 Visible, the plasma method prepares 2%Pd-Cu / Al 2 o 3 Sample at 130 oUnder C conditions, carbon monoxide can be completely oxidized to carbon dioxide, and the activity is signif...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More