Preparation method and application of load-limited platinum nanocluster catalyst
A catalyst and platinum nanotechnology, which is applied in the field of catalyst preparation and application, can solve the problems of low photocatalytic activity and difficulty in controlling the size of platinum, and achieve the effect of simple synthesis process, uniform size and strong operability
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Embodiment 1
[0032] (1) Preparation of metal organic framework PCN-224-BA:
[0033] Meso-tetrakis(4-carboxyphenyl)porphine (H 2 TCPP) (100 mg, TCI, 97%), Benzoic Acid (BA) (3.3 g, TCI, 99%) and Zirconium Oxide Octahydrate (ZrOCl) 2 ·8H 2 O) (300 mg, Wako, 99%) was added to a 300 mL round bottom flask containing 100 mL of N,N-dimethylformamide (DMF) (99.5%, Wako). The mixture was first stirred at room temperature overnight to ensure complete dissolution of the reactants. Then, the reaction was stirred at 90° C. for 5 h at 300 rpm, centrifuged, and then washed three times with fresh DMF and acetone, respectively. The resulting PCN-224-BA nanoparticles were heated under vacuum at 70°C overnight.
[0034] (2) Preparation of catalyst PtSAs@PCN-224-BA:
[0035] We first dispersed PCN-224-BA (100mg) into 20mL of water and added 1.67mL of H 2 PtCl 6 ·6H 2 Aqueous O solution (3 mg / mL) was sonicated at room temperature for one hour, and then placed in an oil bath and heated at 90°C overnight...
Embodiment 2
[0039] (1) The metal organic framework is the preparation of PCN-224-OH:
[0040] 133 mg PCN-224-BA was dispersed in 26 mL DMF, and 2.4 mL concentrated hydrochloric acid was added. Subsequently, it was heated at 120°C at 300 rpm overnight, after cooling, centrifuged, and washed three times with fresh DMF and acetone, followed by vacuum drying. The resulting sample is PCN-224-BA after benzoic acid removal, and is referred to as PCN-224-OH.
[0041] (2) Preparation of catalyst PtNCs@PCN-224-OH:
[0042] We first dispersed PCN-224-OH (100 mg) into 20 mL of water and added 1.67 mL of H 2 PtCl 6 ·6H 2 Aqueous O solution (3 mg / mL) was sonicated at room temperature for one hour, and then placed in an oil bath and heated at 90°C overnight. After cooling, they were washed twice with deionized water and acetone, respectively, and dried in vacuo. Dried samples, pure H at 180 °C 2 After 1 h of reduction, the PCN-224-OH encapsulated with platinum nanoclusters was named PtNCs@PCN-224...
Embodiment 3
[0044] (1) The metal organic framework is the preparation of PCN-224-AA:
[0045] 150 mg PCN-224-OH was dispersed in 15 mL DMF, and 83 μL concentrated acetic acid was added. Subsequently, it was heated at 65°C at 300 rpm overnight, after cooling, centrifuged, and washed three times with fresh DMF and acetone, followed by vacuum drying. The resulting sample was PCN-224-AA with an acetic acid barrier, referred to as PCN-224-AA.
[0046] (2) Preparation of catalyst PtNCs@PCN-224-AA:
[0047] First disperse PCN-224-AA (100mg) in 20mL water, and add 1.67mL H 2 PtCl 6 ·6H 2 Aqueous O solution (3 mg / mL) was sonicated at room temperature for one hour, and then placed in an oil bath and heated at 90°C overnight. After cooling, they were washed twice with deionized water and acetone, respectively, and dried in vacuo. Dried samples, pure H at 180 °C 2 After 1 h of reduction in medium, the PCN-224-AA encapsulated with platinum nanoclusters was named PtNCs@PCN-224-AA.
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