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Monatomic rhodium catalyst as well as preparation method and application thereof

A rhodium catalyst and catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve restrictions on industrial production, cumbersome synthesis steps, long synthesis time, etc. problems, to achieve the effect of low production equipment requirements, simple process, stable chemical properties and physical structure

Pending Publication Date: 2021-12-21
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: the existing single-atom-doped titanium dioxide catalyst has long synthesis time, cumbersome synthesis steps, and the use of organic titanium alkoxide as raw material has high cost, which limits its promotion in industrial production, etc. question

Method used

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  • Monatomic rhodium catalyst as well as preparation method and application thereof
  • Monatomic rhodium catalyst as well as preparation method and application thereof
  • Monatomic rhodium catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of preparation method of monoatomic rhodium catalyst:

[0033] Weigh 0.5g rutile titanium dioxide powder, 4.12mg RhCl 3 ·3H 2 0, 2mL of ultra-pure water was added to a round-bottom evaporating dish, stirred and sonicated for 10 minutes to make it evenly mixed, then continuously stirred under the condition of heating in a water bath to evaporate the water to obtain a pink solid powder, and the pink solid powder was placed in a mortar Grind for about 30 minutes to make it further mixed evenly, then transfer it to a crucible, put it into a muffle furnace for calcination at 700°C for 8 hours, and then grind the product for 30 minutes to obtain monoatomic rhodium Ti after cooling to room temperature. 0.9975 Rh 0.0025 o 2 catalyst.

[0034] Ti 0.9975 Rh 0.0025 o 2 The X-ray diffraction pattern (XRD) of the catalyst at 700°C is shown in figure 1 , UV-Vis DRS (UV-Vis DRS) see figure 2 . Spherically aberration-corrected High Angle Annular Dark Field Scanning Tr...

Embodiment 2

[0036] A kind of preparation method of monoatomic rhodium catalyst:

[0037] Weigh 0.5g rutile titanium dioxide powder, 8.28mg RhCl 3 ·3H 2 0, 2mL of ultra-pure water was added to a round-bottom evaporating dish, stirred and sonicated for 10 minutes to make it evenly mixed, then continuously stirred under the condition of heating in a water bath to evaporate the water to obtain a pink solid powder, and the pink solid powder was placed in a mortar Grind for about 30 minutes to make it further mixed evenly, then transfer it to a crucible, put it in a muffle furnace for calcination at 700°C for 8 hours, and then grind the product for 30 minutes to obtain a monoatomic rhodium catalyst, which is marked as Ti 0.995 Rh 0.005 o 2 / 700°C.

[0038] Ti 0.995 Rh 0.005 o 2 The X-ray diffraction pattern (XRD) of the catalyst at 700°C is shown in figure 1 , UV-Vis DRS (UV-Vis DRS) see figure 2 . Spherically aberration-corrected High Angle Annular Dark Field Scanning Transmission E...

Embodiment 3

[0040] A kind of preparation method of monoatomic rhodium catalyst:

[0041] Weigh 0.5g rutile titanium dioxide powder, 16.65mg RhCl 3 ·3H 20, 2mL of ultra-pure water was added to a round-bottom evaporating dish, stirred and sonicated for 10 minutes to make it evenly mixed, then continuously stirred under the condition of heating in a water bath to evaporate the water to obtain a pink solid powder, and the pink solid powder was placed in a mortar Grind for about 30 minutes to make it further mixed evenly, then transfer it to a crucible, put it in a muffle furnace for calcination at 700°C for 8 hours, and then grind the product for 30 minutes to obtain a monoatomic rhodium catalyst, which is marked as Ti 0.99 Rh 0.01 o 2 / 700°C.

[0042] Ti 0.99 Rh 0.01 o 2 The X-ray diffraction pattern (XRD) of the catalyst at 700°C is shown in figure 1 , UV-Vis DRS (UV-Vis DRS) see figure 2 . Depend on figure 1 Visible, Ti 0.99 Rh 0.01 o 2 The positions of all the diffraction p...

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Abstract

The invention discloses a monatomic rhodium catalyst as well as a preparation method and application thereof. The monatomic rhodium catalyst is a doped monatomic catalyst, and the chemical formula of the monatomic rhodium catalyst is Ti(1-x)RhxO2, wherein x is greater than or equal to 0.001 and less than or equal to 0.1. The preparation method comprises the following steps: uniformly mixing a rutile type titanium dioxide precursor with a rhodium-containing compound, conducting calcining at high temperature, and performing cooling to room temperature to obtain the monatomic rhodium catalyst. The preparation method disclosed by the invention has the characteristics of simple process, low requirements on production equipment and capability of realizing large-scale production, and the obtained monatomic rhodium catalyst has the advantages of stable chemical properties and physical structures, excellent catalytic performance and the like, and has a good large-scale application prospect; and the monatomic rhodium catalyst disclosed by the invention can be applied to the catalytic fields of hydrogen production by photocatalytic decomposition of water, carbon dioxide reduction, thermocatalysis, pollutant degradation and the like.

Description

technical field [0001] The invention relates to a single-atom rhodium catalyst and its preparation method and application, belonging to the technical field of catalysts. Background technique [0002] Catalysts play an indispensable role in industrial production. In order to obtain higher chemical conversion efficiency, the development of more efficient catalysts has always been the focus of materials and chemistry. In recent years, the research on single-atom catalysts has received extensive attention. Due to the unique electronic structure, higher utilization of metal atoms, and more efficient mass transfer channels, single-atom catalysts exhibit excellent catalytic activity and selective catalytic active sites. Therefore, the excellent properties of single-atom catalysts make them widely used in the fields of photocatalytic hydrogen production, thermal catalysis, pollutant degradation, and carbon dioxide reduction. [0003] Single-atom catalysts are further divided into ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/46B01J35/00C01B3/04
CPCB01J23/464B01J21/063C01B3/042B01J35/39Y02E60/36
Inventor 马贵军王佳明
Owner SHANGHAI TECH UNIV
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