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Preparation method of supported NiPd bimetallic catalyst and application of supported NiPd bimetallic catalyst in dehalogenation reaction

A bimetallic catalyst, supported technology, applied in catalyst activation/preparation, preparation of organic compounds, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as unrelevant disclosure, and achieve cost reduction , improve catalytic activity, reduce the effect of dosage

Active Publication Date: 2020-09-22
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above article mainly focuses on the research on the influence of the synthesis process of Ni-Pd catalyst on the catalytic performance, especially the study of the rich Nickel-containing Ni-Pd alloy catalysts, palladium-rich Ni-Pd alloy catalysts, and pure Pd and pure Ni catalysts have an impact on catalytic selectivity, but there is no relevant research on the application or application effect of NiPd bimetallic catalysts. disclosure

Method used

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  • Preparation method of supported NiPd bimetallic catalyst and application of supported NiPd bimetallic catalyst in dehalogenation reaction
  • Preparation method of supported NiPd bimetallic catalyst and application of supported NiPd bimetallic catalyst in dehalogenation reaction
  • Preparation method of supported NiPd bimetallic catalyst and application of supported NiPd bimetallic catalyst in dehalogenation reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The preparation method of supported NiPd bimetallic catalyst comprises the following steps:

[0066] (1) Accurately weigh 0.1g sodium chloropalladate (Na 2 PdCl 4 ), 0.0269g nickel chloride (NiCl 2 ·6H 2 (2) and 20mL deionized water are added in the 100mL round bottom flask A, and magnetic stirring makes sodium chloropalladate and nickel chloride be completely dissolved in deionized water, and the solution is transparent reddish brown;

[0067] (2) Add pre-prepared 50mg graphene oxide (GO) and 10mL deionized water into a 100mL round-bottomed flask B, ultrasonicate it for 2h until graphene oxide is completely dissolved in deionized water, and the solution is muddy yellow;

[0068] (3) Add the graphene oxide aqueous solution in the round bottom flask B to the round bottom flask A drop by drop, the rate of addition is about 60 drops per minute, and ultrasonic treatment is performed while adding, and the ultrasonic treatment is continued for 1 h after the addition, so th...

Embodiment 2

[0074] The present inventor carried out transmission electron microscope (TEM) characterization, high-resolution transmission electron microscope (HRTEM) characterization, X-ray powder diffraction (XRD) characterization to the loaded type NiPd bimetallic catalyst obtained in embodiment 1, and the results are as follows:

[0075] 1. Transmission electron microscopy (TEM) characterization

[0076] Ni was examined by transmission electron microscopy (TEM). 1 PD 3 The @rGO catalyst was characterized as figure 1 As shown in (a) and (b), the catalyst is uniformly dispersed, uniform in size, without obvious agglomeration, and its particle size is about 4nm.

[0077] 2. Characterization by High Resolution Transmission Electron Microscopy (HRTEM)

[0078] Ni was examined by high-resolution transmission electron microscopy (HRTEM). 1 PD 3 The @rGO catalyst was characterized as figure 2 As shown, its lattice spacing is 0.210nm.

[0079] 3. X-ray powder diffraction (XRD) character...

Embodiment 3

[0082] The supported NiPd bimetallic catalyst obtained in Example 1 is applied to the dehalogenation reaction of catalyzed halogenated aromatic hydrocarbons, specifically as follows:

[0083] 1. Ni 1 PD 3 Optimization of @rGO Catalyzed Chlorobenzene Dechlorination Reaction Conditions

[0084] At present, in the field of catalytic chemistry, precious metals such as gold (Au), ruthenium (Ru), rhodium (Rh), iridium (Ir), and platinum (Pt), which are expensive and difficult to obtain, are mainly used as catalysts. In the present invention, metal Ni and transition metal Pd that are cheap and easy to obtain are used to load on reduced graphene oxide (Ni 1 PD 3 @rGO) as a catalyst is of great significance in catalytic chemistry, so Ni 1 PD 3 @rGO has shown promising applications in the catalytic industry.

[0085] Ni 1 PD 3 The steps for @rGO to catalyze the dechlorination of chlorobenzene are as follows:

[0086] Accurately weigh 10mgNi 1 PD 3 The @rGO catalyst was added ...

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Abstract

The invention belongs to the technical field of bimetallic catalyst preparation, and particularly relates to a preparation method of a supported NiPd bimetallic catalyst and application of the supported NiPd bimetallic catalyst in a dehalogenation reaction. The supported NiPd bimetallic catalyst provided by the invention is mainly prepared from the following raw materials: sodium chloropalladate,nickel chloride, graphene oxide and sodium borohydride. The NiPd bimetallic catalyst disclosed by the invention has the advantages of more adjustability, high catalytic activity, stronger magnetism, capability of being separated by centrifugal separation or magnetic separation and high cyclic utilization rate; the NiPd bimetallic catalyst provided by the invention is especially suitable for beingused in a dehalogenation reaction, has high catalytic activity and catalytic efficiency and excellent stability, and has a conversion rate of 99% and a selectivity of still greater than 99% after being recycled for 10 times.

Description

technical field [0001] The invention belongs to the technical field of preparation of bimetallic catalysts, and in particular relates to a preparation method of a supported NiPd bimetallic catalyst, and also relates to the application of the catalyst in dehalogenation reaction. Background technique [0002] Regarding the synthesis of Ni-Pd catalysts, CN2219170Y discloses a nano-NiPd catalyst preparation device which is composed of vacuum chamber, cold trap, cathode, anode and other components and is used to prepare two kinds of high melting point metal nickel and palladium with similar melting points into alloys , Regarding the preparation method, the above-mentioned documents are not disclosed. [0003] Regarding the influence of the synthesis process of the Ni-Pd catalyst on the catalytic performance, Adriano H.Braga et al. decomposed the metal organic precursor Ni(cod) 2 and Pd 2 (dba) 3 Bimetallic Ni-Pd and Ni, Pd reference catalysts were prepared to obtain nanopartic...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/16C07C1/26C07C15/04C07C15/06C07C37/00C07C39/04C07C51/347C07C63/06C07C209/74C07C211/46C07D213/16C07C15/24C07C15/14
CPCB01J23/892B01J37/16C07C1/26C07C37/00C07C51/347C07C209/74C07D213/16C07C2523/89B01J35/33B01J35/40C07C15/04C07C15/06C07C39/04C07C63/06C07C211/46C07C15/24C07C15/14Y02P20/52
Inventor 黄飞王溪溪汪婧孙金余李长江兰艳素
Owner HUANGSHAN UNIV
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