Multiwalled carbon nanotube-loaded PdSn catalyst based on deep eutectic solvent, and preparation method and application of catalyst
A technology of multi-walled carbon nanotubes and deep eutectic solvents, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve large-scale preparation and commercialization of catalysts To achieve the effect of increasing the electrochemical active surface area, enhancing the charge transfer interaction, and reducing the size of the chemical application limitations
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[0019] refer to figure 1 , using choline chloride / urea DES as the medium to prepare multi-walled carbon nanotubes (MWCNTs) supported PdSn catalyst, the specific process is as follows: add 10 mg concentrated H to 20 mL choline chloride / urea DES 2 SO 4 or HNO 3 Acidified MWCNTs were ultrasonically dispersed for 2 h, and 56.4 mM PdCl with a mass ratio of PdSn / MWCNTs = 1 / 4 was added 2 and 42.1 mM SnCl 2 DES solution, control the mass ratio of Pd / Sn added to Pd / Sn = 1 / 0.1~1, add 100 mg NaBH after magnetic stirring for 1 h 4 solid, continue to stir for 10 min, then transfer the resulting suspension into a 25 mL reactor, and react at 80-200 °C for 12 h. After the reaction product is centrifuged, washed and vacuum-dried, the MWCNTs-supported PdSn catalyst is obtained.
[0020] XRD analysis showed that the size of Pd nanoparticles in this catalyst was significantly reduced, and its average size was 2.3 nm, which was significantly smaller than that in the Pd-supported MWCNTs catalys...
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