Porphyrin-stabilized noble metal nanoparticle catalyst and application thereof
A nanoparticle and noble metal technology, applied in the field of porphyrin-stabilized gold nanoparticle catalyst preparation, can solve the problems of catalytic performance degradation, agglomeration, thermodynamic instability, etc., and achieve the effect of good particle shape and narrow particle size
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Embodiment 1
[0034] The preparation scheme that the present invention adopts comprises the following steps
[0035] Step 1: Put 5.0×10 -3 The porphyrin of mmol is dissolved in ethanol (8mL), stirs until dissolving completely;
[0036] Step 2: Put 2.0×10 -2 The rhodium nitrate solution of mmol is dissolved in deionized water (1mL), and the 3min / mL addition rate is added dropwise in the solution that step 1 gains, stirs under ice-bath environment;
[0037] Step 3: Put 2.0×10 -1 One mmol of sodium borohydride was dissolved in 1 mL of deionized water, and added dropwise at a rate of 3 min / mL to the ice-bath mixed solution obtained in Step 3, and reacted for 2 hours. A porphyrin-stabilized rhodium nanoparticle (RhNP@THPP) catalyst can be obtained.
[0038] figure 1 It is the transmission electron micrograph of the novel catalyst prepared by the present invention, from figure 1 It can be seen that rhodium nanoparticles are uniform spherical, small in particle size and good in dispersibilit...
Embodiment 2
[0041] The rhodium nanoparticle catalyst prepared according to embodiment 1 is effective in catalyzing ammonia borane (NH 3 BH 3 ) The concrete steps of hydrolysis hydrogen production reaction are as follows:
[0042]
[0043] Step 1: Dissolving an appropriate amount of ammonia borane in deionized water to form a 0.5mol / L solution;
[0044] Step 2: will contain 4×10 -3 The porphyrin-stabilized platinum nanoparticle catalyst solution of mmol rhodium nanoparticles is placed in the reactor, a stirrer is added, the reactor is sealed, and the stirrer is opened to stir;
[0045] Step 3: Use a syringe to draw 1mL of the ammonia borane solution in step 1, quickly inject it into the reactor of step 2, and start timing at the same time;
[0046] Step 4: Record the hydrogen volume at the corresponding time.
[0047] image 3 It is a relationship diagram between the reaction time of the novel catalyst prepared by the invention to catalyze the hydrolysis of ammonia borane to produc...
Embodiment 3
[0049] The preparation scheme that the present invention adopts comprises the following steps
[0050] Step 1: Put 5.0×10 -3 The porphyrin of mmol is dissolved in ethanol (8mL), stirs until dissolving completely;
[0051] Step 2: Put 2.0×10 -2 The platinum tetrachloride of mmol is dissolved in the deionized water (1mL), and 3min / mL is added dropwise in the solution gained in step 1, and stirs evenly under ice-bath environment;
[0052] Step 3: Put 2.0×10 -1 One mmol of sodium borohydride was dissolved in 1 mL of deionized water, and added dropwise at a rate of 3 min / mL to the ice-bath mixed solution obtained in Step 3, and reacted for 2 hours. The porphyrin-stabilized platinum nanoparticles (PtNP@THPP) catalyst can be obtained.
[0053] Figure 4 It is the transmission electron micrograph of the novel catalyst prepared by the present invention, from Figure 4It can be seen that the platinum nanoparticles are uniform spherical, with small particle size and good dispersion...
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