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Pt/Rh nano composite material and preparation method and application thereof

A nanocomposite material and nanotechnology, applied in the field of nanomaterials, can solve the problems of unsuitable Pt-based nanomaterials, etc., and achieve the effects of excellent activity, simple preparation method, and enhanced activity

Active Publication Date: 2018-12-25
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above method can prepare nano-metal materials more conveniently, it is not suitable for Pt-based nano-materials.

Method used

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  • Pt/Rh nano composite material and preparation method and application thereof
  • Pt/Rh nano composite material and preparation method and application thereof
  • Pt/Rh nano composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The present embodiment prepares Pt / Rh nanocomposite material according to the following method:

[0059] Dissolve chloroplatinic acid and rhodium acetylacetonate in benzyl alcohol, add polyvinylpyrrolidone and formaldehyde, stir well, wherein the concentration of chloroplatinic acid is 0.7mmol / L, the concentration of rhodium acetylacetonate is 3.2mmol / L, and the concentration of polyvinylpyrrolidone is 16.0g / L, formaldehyde concentration is 7000mmol / L. The reaction was heated at 180°C for 8h. After the reaction is finished, cool down to room temperature, wash the reactant with acetone and ethanol, centrifuge to remove the supernatant, and obtain the Pt / Rh nanocomposite material.

[0060] The Pt / Rh nanocomposite material provided by this embodiment is composed of Rh nanosheets and Pt nanoclusters loaded on the Rh nanosheets, the molar ratio of Pt nanoclusters to Rh nanosheets is 0.219:1, and the ratio of Rh nanosheets is The shape is trapezoidal, the average length of ...

Embodiment 2

[0071] The present embodiment prepares Pt / Rh nanocomposite material according to the following method:

[0072] Dissolve potassium chloroplatinate and rhodium chloride in ethylene glycol, add polyethylene glycol and formaldehyde, stir well, wherein the concentration of potassium chloroplatinate is 1.0mmol / L, the concentration of rhodium chloride is 3.0mmol / L, polyethylene glycol The diol concentration is 12.0g / L, and the formaldehyde concentration is 5000mmol / L. The reaction was heated at 180°C for 8h. After the reaction is finished, cool down to room temperature, wash the reactant with acetone and ethanol, centrifuge to remove the supernatant, and obtain the Pt / Rh nanocomposite material.

[0073] The Pt / Rh nanocomposite material provided in this embodiment is composed of Rh nanosheets and Pt nanoclusters loaded on the Rh nanosheets, the molar ratio of Pt nanoclusters to Rh nanosheets is 0.327:1, and the ratio of Rh nanosheets is The shape is trapezoidal, the average length ...

Embodiment 3

[0076] The present embodiment prepares Pt / Rh nanocomposite material according to the following method:

[0077] Dissolve platinum acetylacetonate and rhodium acetylacetonate in benzyl alcohol, add polyvinylpyrrolidone and salicylaldehyde, stir evenly, wherein the concentration of platinum acetylacetonate is 1.5mmol / L, the concentration of rhodium acetylacetonate is 3.3mmol / L, polyvinylpyrrolidone The concentration is 25.0g / L, and the concentration of salicylaldehyde is 4mmol / L. The reaction was heated at 180°C for 8h. After the reaction is finished, cool down to room temperature, wash the reactant with acetone and ethanol, centrifuge to remove the supernatant, and obtain the Pt / Rh nanocomposite material.

[0078] The Pt / Rh nanocomposite material provided in this embodiment is composed of Rh nanosheets and Pt nanoclusters loaded on the Rh nanosheets, the molar ratio of Pt nanoclusters to Rh nanosheets is 0.449:1, and the Rh nanosheets The shape is trapezoidal, the average len...

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Abstract

The invention provides a Pt / Rh nano composite material and a preparation method and application thereof. The Pt / Rh nano composite material comprises Rh nanosheets and Pt nanoclusters loaded on the Rhnanosheets. The preparation method includes: dissolving platinum salt and rhodium salt in a solvent, adding a surfactant and a reducing agent, performing heating reaction on the obtained mixed solution, and performing solid-liquid separation after the reaction to obtain the Pt / Rh nano composite material. The Pt / Rh nano composite material has the advantages that the prepared Pt / Rh nano composite material has high activating ability to oxygen and has a activity feature similar to oxide enzymes, the Pt / Rh nano composite material has evidently enhanced activity as compared with independent Rh sheets and Pt nanoclusters, the maximum reaction rate (Vmax) of the Pt / Rh nano composite material can reach 1.88*10<-7>M*s<-1>, and the Pt / Rh nano composite material can serve as the oxide enzyme mimic enzyme to replace a natural enzyme to be applied to fields such as immunoassay, biochemical detection and clinical diagnosis.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a Pt-based nanocomposite material, in particular to a Pt / Rh nanocomposite material and its preparation method and application. Background technique [0002] Supported Pt-based nanocomposites have been widely used in heterogeneous catalysis. Many studies have shown that the composites exhibit significantly enhanced activity and stability due to the synergistic effect between Pt and the support. For example, Zhang Hua group reported that MoS 2 Nanosheet-supported Pt nanoparticles and layered double hydroxide Ni(OH) reported by Tang Zhiyong's group 2 Supported Pt nanowires, as electrocatalysts for hydrogen evolution reaction (HER), exhibit higher activity than individual supports and commercial Pt / C (Nat.Commun.2013,4,1444; Nat.Commun.2015, 6,6430). Designing and preparing new structures and high-performance Pt-based nanocomposites has become a research hotspot in the field of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J35/02
CPCB01J23/464B01J35/393B01J35/50
Inventor 杨蓉蔡双飞王琛
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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