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Ni3Fe-loaded monatomic noble metal catalyst, preparation method and application

A precious metal and catalyst technology, applied in the field of Ni3Fe intermetallic compound supported single-atom precious metal catalyst, preparation field, can solve problems such as lack of synthesis strategy

Pending Publication Date: 2022-08-02
BEIJING SINGLE ATOM SITE CATALYSIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there are few reports on single-atom catalysts supported by intermetallic compounds, and the lack of effective synthesis strategies is also one of the challenges for their development.

Method used

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  • Ni3Fe-loaded monatomic noble metal catalyst, preparation method and application
  • Ni3Fe-loaded monatomic noble metal catalyst, preparation method and application
  • Ni3Fe-loaded monatomic noble metal catalyst, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a. 16mmol Ni (NO 3 ) 2 ·6H 2 O and 5.33mmol Fe(NO 3 ) 3 ·9H 2 O was dissolved in 20 ml of deionized water to form solution A.

[0044] b. Combine 34.15 mmol NaOH and 0.1 mmol H 2 PtCl 6 Dissolve in 20 ml of deionized water to form solution B.

[0045] c. Place the cleaned magnetic rotor in a beaker containing 40 ml of deionized water (solution C), place the beaker on a magnetic stirrer, and turn on the speed of 600 rpm.

[0046] d. Add solutions A and B dropwise to solution C while using a pH indicator to adjust the solution's hold to 8.5.

[0047] e. After the above mixed solution was continuously stirred for 12 hours, the brown precipitate was collected and washed six times alternately with ethanol and water by high-speed centrifugation. After drying at 60 °C for 4 h and grinding, adsorbed PtCl was obtained 6 2- The nickel-iron layered hydroxide material (PtCl 6 2- / NiFe-LDHs).

[0048] f. The prepared PtCl 6 2- / NiFe-LDHs transferred to a tube furnace...

Embodiment 2

[0051] a. 16mmol Ni (NO 3 ) 2 ·6H 2 O, 5.33 mmol Fe(NO 3 ) 3 ·9H 2 O and 0.1 mmol H 2 PtCl 6 Dissolve in 20 ml of deionized water to form solution A.

[0052] b. Solution B was formed by dissolving 34.15 mmol NaOH in 20 ml deionized water.

[0053] c. Place the cleaned magnetic rotor in a beaker containing 40 ml of deionized water (solution C), place the beaker on a magnetic stirrer, and turn on the speed of 600 rpm.

[0054] d. Add solutions A and B dropwise to solution C while using a pH indicator to adjust the solution's hold to 8.5.

[0055] e. After the above mixed solution was continuously stirred for 12 hours, the brown precipitate was collected and washed six times alternately with ethanol and water by high-speed centrifugation. After drying at 60 °C for 4 h and grinding, adsorbed PtCl was obtained 6 2- The nickel-iron layered hydroxide material (PtCl 6 2- / NiFe-LDHs).

[0056] f. The prepared PtCl 6 2- / NiFe-LDHs transferred to a tube furnace at 5%H 2...

Embodiment 3

[0059] a. 16mmol Ni (NO 3 ) 2 ·6H 2 O and 5.33mmol Fe(NO 3 ) 3 ·9H 2 O was dissolved in 20 ml of deionized water to form solution A.

[0060] b. Combine 34.15 mmol NaOH and 0.02 mmol H 2 PtCl 6 Dissolve in 20 ml of deionized water to form solution B.

[0061] c. Place the cleaned magnetic rotor in a beaker containing 40 ml of deionized water (solution C), place the beaker on a magnetic stirrer, and turn on the speed of 600 rpm.

[0062] d. Add solutions A and B dropwise to solution C while using a pH indicator to adjust the solution's hold to 8.5.

[0063] e. After the above mixed solution was continuously stirred for 12 hours, the brown precipitate was collected and washed six times alternately with ethanol and water by high-speed centrifugation. After drying at 60 °C for 4 h and grinding, adsorbed PtCl was obtained 6 2- The nickel-iron layered hydroxide material (PtCl 6 2- / NiFe-LDHs).

[0064] f. The prepared PtCl 6 2- / NiFe-LDHs transferred to a tube furnac...

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Abstract

The invention discloses a Ni3Fe-loaded monatomic noble metal catalyst as well as a preparation method and application thereof. The noble metal is dispersed on the non-noble metal based intermetallic compound Ni3Fe in the form of isolated atoms, and the loading capacity is 0.1-10wt%. The preparation process mainly comprises the following steps: carrying out codeposition reaction on soluble noble metal salt and more than two non-noble metal salts under an alkaline condition to form layered bis (poly) metal hydroxide, and then carrying out hydrogen calcination reduction on the layered bis (poly) metal hydroxide. The intermetallic compound supported monatomic catalyst material shows excellent catalytic activity, selectivity and stability in preparation of 2, 5-dimethylfuran from 5-hydroxymethylfurfural, and has a great industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular, provides a Ni 3 Catalyst, preparation method and application of Fe intermetallic compound supported single-atom noble metal. Background technique [0002] In recent years, single-atom catalysts have attracted extensive attention in the field of heterogeneous catalysis due to their high atom utilization and excellent catalytic activity (Nat. Rev. Chem. 2018, 2, 65-81; Chem. Soc.Rev.2019,48,5207-5241;Nat.Catal.2019,2,590-602;Nat.Catal.2018,1,63-72;Nat.Nanotechnol.2018,13,702-707;Science 2016,353,150-154 ; Nature 2019, 565, 631-635). However, for some complex reactions, which often contain multiple reaction steps, multiple catalytic sites are required to complete the entire conversion process. In theory, it is difficult for a single atomic site to catalyze all the reaction steps efficiently at the same time. Therefore, constructing multiple catalytic site...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07D307/42
CPCB01J23/892C07D307/42
Inventor 孟格连超
Owner BEIJING SINGLE ATOM SITE CATALYSIS TECH CO LTD