Supported metal nano-cluster catalyst for CO oxidation
A metal nanocluster, catalyst technology, applied in physical/chemical process catalysts, catalyst activation/preparation, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of decreased catalytic activity, poor stability, etc. Reaction stability, good stability, the effect of improving CO oxidation performance and stability
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Embodiment 1
[0027] According to the literature description (Jin R. et al., J Am Chem Soc., 2008, 130, 5883-5885) kinetically controlled size concentration method synthesis (Au) 25 (SR) 18 Metal nanoclusters; where: S is sulfur, R=-CH 2 CH 2 Ph;
[0028] Take 490mg CeO 2 Soak the oxide powder carrier to 10mL (M 1 ) n (SR) m CH 2 Cl 2 solution (with Au 25 (SR) 18 10 mg) for 24 hours, dried to obtain 2% Au 25 (SR) 18 / CeO 2 Catalyst, denoted as catalyst A, the thermogravimetric analysis result of this catalyst shows, 160 ℃ of catalysts do not decompose in air, still keep the stable supported metal nano-cluster structure.
Embodiment 2
[0030] The preparation steps are the same as in Example 1, except that (Au) 25 (SR) 18 Metal nanoclusters changed to (Au) 38 (SR) 24 Metal nanoclusters; fabricated Au 38 (SR) 24 / CeO 2 Catalyst, denoted as catalyst B.
Embodiment 3
[0032] The preparation steps are the same as in Example 1, except that (Au) 25 (SR) 18 Metal nanoclusters changed to (Au) 144 (SR) 60 metal nanoclusters, made of Au 144 (SR) 60 / CeO 2 Catalyst, denoted as catalyst C.
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