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Support catalyst with active metals in atomic-scale dispersion in carrier as well as preparation method and application of catalyst

A supported catalyst and active metal technology, applied in the field of supported catalysts and their preparation, can solve the problems of limiting the application of atomically dispersed supported catalysts, complicated post-processing processes, expensive drugs and raw materials, etc., and achieve high mechanical strength and low cost. , the effect of high selectivity

Active Publication Date: 2019-09-20
SHANDONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the above methods can effectively prepare atomically dispersed supported catalysts, but most methods involve harsh synthesis conditions, expensive drugs and raw materials, and complicated post-treatment processes, which greatly limit the ability of atomically dispersed supported catalysts. Application in actual production

Method used

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  • Support catalyst with active metals in atomic-scale dispersion in carrier as well as preparation method and application of catalyst
  • Support catalyst with active metals in atomic-scale dispersion in carrier as well as preparation method and application of catalyst
  • Support catalyst with active metals in atomic-scale dispersion in carrier as well as preparation method and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Dissolve 60.0mL with 0.009mol / L anhydrous NiCl 2 and 0.091mol / L anhydrous AlCl 3 The formamide solution was placed in a polytetrafluoroethylene reactor with a volume of 100.0 mL, and reacted at 180° C. for 12 hours. After the reaction time expires, lower the temperature naturally, take out the solid-liquid mixture, separate the solid and liquid by centrifugation, dry the solid in an oven at 80°C, collect the dry powder, and use a muffle furnace to roast at 450°C for 3 hours to obtain the target product Ni / Al 2 o 3 , the transmission electron microscope photo see figure 1 , the nitrogen adsorption-desorption curve is shown in Figure 14 , XPS Ni2p peak splitting curve see Figure 15 .

Embodiment 2

[0063] In addition to the type B salt anhydrous AlCl 3 Replaced by Ce(NO 3 ) 2 ·6H 2 O, other is the same as embodiment 1, promptly obtains target product Ni / CeO 2 , the transmission electron microscope photo see figure 2 .

Embodiment 3

[0065] anhydrous NiCl 2 The concentration is increased to 0.018mol / L, AlCl 3 Concentration is raised to 0.182mol / L, other is the same as embodiment 1, promptly obtains target product Ni / Al 2 o 3 , the transmission electron microscope photo see image 3 .

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Abstract

The invention discloses a support catalyst with active metals in atomic-scale dispersion in a carrier. The support catalyst comprises active metal species and carrier metal oxides, wherein active metals comprise one or more of Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Ru, Rh, Pd, Ag, W, Ir, Pt and Au; and the carrier metals comprise one or more of Ti, Zr, Nb, Ce, Al, Ga, In, Si, Ge and Sn. The invention furthermore discloses a preparation method and application of the catalyst. By virtue of an in-situ carrier generation method, the support catalyst with the active metals in atomic-scale dispersion in the carrier is prepared, and the catalyst is free of aggregate particles of which the granularity is greater than 1nm, of the active metal species. The supportcatalyst is low in raw material cost, simple in reaction operation and high in safety, no after-treatment step is needed, and industrial enlarged production is facilitated. Meanwhile, the application range of the catalyst is wide, and scientific researches and enlarged production for different catalytic systems are facilitated.

Description

technical field [0001] The invention belongs to the field of preparation of new materials, and in particular relates to a supported catalyst in which active metals are dispersed at the atomic level in a carrier, a preparation method and application thereof. Background technique [0002] It is generally believed that sub-nanometer clusters have better catalytic activity or selectivity than nanoparticles and bulk materials, because when the particle dispersion reaches the single-atom size, many new characteristics are caused, such as sharply increased surface free energy, Quantum size effects, unsaturated coordination environments and metal-support interactions, etc. Theoretically, the ideal dispersion of supported metal catalysts is that the metals are evenly distributed on the support in the form of single atoms. Compared with nano-scale supported catalysts, each metal atom of atomic-scale catalysts is used as an active site, which greatly improves the catalytic efficiency....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/755B01J23/72B01J23/52B01J23/44B01J23/888B01J23/882B01J23/83B01J37/10B01J37/08B01J37/20B01J37/28C07C1/12C07C9/04
CPCB01J23/75B01J23/755B01J23/72B01J23/52B01J23/44B01J23/888B01J23/882B01J23/83B01J37/10B01J37/086B01J37/20B01J37/28C07C1/12C07C9/04
Inventor 张国新张颖孙晓明白爽陈建雯
Owner SHANDONG UNIV OF SCI & TECH
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