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Platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, preparation method and application thereof

A technology of co-doping and carbon materials, applied in the direction of electrical components, battery electrodes, circuits, etc., to achieve the effects of easy operation, excellent electrocatalytic activity and stability, and easy mass production

Inactive Publication Date: 2018-01-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Carbon materials are considered to be an ideal electrocatalytic substrate due to their high electrical conductivity and chemical stability, but it is still a challenge to maintain excellent electrocatalytic performance while reducing the amount of platinum.

Method used

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  • Platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, preparation method and application thereof
  • Platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, preparation method and application thereof
  • Platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, preparation method and application thereof

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preparation example Construction

[0018] One aspect of the embodiments of the present invention provides a method for preparing a platinum-supported nitrogen-phosphorus co-doped carbon material hydrogen evolution catalyst, which includes:

[0019] Calcining nitrogen-containing polymers mainly formed by the reaction of phosphorus-containing precursors and nitrogen-containing polymer monomers at high temperatures in a protective atmosphere to obtain carbon materials co-doped with nitrogen and phosphorus;

[0020] The nitrogen and phosphorus co-doped carbon material is uniformly mixed with a platinum source in a solvent, and a reducing agent is added to prepare a platinum-supported nitrogen and phosphorus co-doped carbon material hydrogen evolution catalyst.

[0021] In some preferred embodiments, the preparation method includes: quickly mixing the phosphorus-containing precursor, the nitrogen-containing polymer monomer and the initiator in a solvent at a temperature of 0-4°C, and mixing the mixed liquid Stand ov...

Embodiment 1

[0044] (1) Preparation of nitrogen and phosphorus co-doped carbon materials

[0045] 0.658mL mass concentration is the phytic acid aqueous solution of 50%, the mixed solution of the deionized water of 3.5mL and 0.458mL aniline (analytical grade), and the 1mL aqueous solution containing 0.286g ammonium persulfate is cooled to 4 ℃ and then mixed rapidly, the The mixed solution was left to stand overnight and then soaked and washed with deionized water for two days; after freeze-drying, it was calcined at a high temperature, and the temperature was raised to 1000°C for 2 hours in a nitrogen atmosphere at a rate of 3°C / min. After cooling down to room temperature, it was taken out and ground to obtain Nitrogen and phosphorus co-doped carbon materials, the scanning electron micrograph and transmission electron micrograph are as follows Figure 1a-Figure 1b shown.

[0046] (2) Preparation of nitrogen-phosphorous co-doped carbon material hydrogen evolution catalyst loaded with platinu...

Embodiment 2

[0052] (1) Preparation of nitrogen and phosphorus co-doped carbon materials

[0053] Cool the mixed solution of 0.45mL 50% phytic acid aqueous solution, 3.5mL deionized water and 0.458mL aniline (analytical pure), and 1mL aqueous solution containing 0.286g ammonium persulfate to 4°C and mix quickly, and let the mixed solution stand After keeping overnight, soak and wash with deionized water for two days; after freeze-drying, perform high-temperature calcination, heat up to 600°C for 12 hours at a rate of 15°C / min in a nitrogen atmosphere, and wait until it cools down to room temperature, take it out and grind to obtain nitrogen and phosphorus co-doped complex carbon materials.

[0054] (2) Preparation of nitrogen-phosphorous co-doped carbon material hydrogen evolution catalyst loaded with platinum nanoparticles

[0055] Take 15mg of the above-prepared nitrogen-phosphorus co-doped carbon material and disperse it in 14mL aqueous solution and sonicate for 2h, then add 80μL of 0....

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Abstract

The invention discloses a platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, a preparation method and an application thereof. The catalyst comprises a nitrogen phosphorus co-doped carbon material used as the substrate and platinum nanoparticles uniformly loaded on the substrate; the platinum nanoparticles are 0.8-3nm in average dimensions; the preparation method comprises the steps of performing high-temperature calcining on a nitrogen-containing polymer which is formed mainly by a reaction between a phosphorus-containing precursor and a nitrogen-containing polymer monomer in protective atmosphere to obtain the nitrogen phosphorus co-doped carbon material; and performing uniform mixing on the carbon material and a platinum source in a solvent, and then adding a reducing agent to prepare the catalyst. The preparation method disclosed in the invention is easy to operate, simple and reliable, and low in cost; and the prepared catalyst has very excellent electrocatalytic activity and stability, and huge application prospect in the field of electrochemical hydrogen evolution field.

Description

technical field [0001] The invention specifically relates to a hydrogen evolution composite catalyst of a nitrogen-phosphorus co-doped carbon material loaded with platinum, a preparation method thereof and an application in a hydrogen evolution reaction, belonging to the technical field of electrochemical hydrogen evolution catalysts. Background technique [0002] Today, because of the excessive use of fossil fuels and the pollution of the environment, people have attracted widespread attention to renewable energy. Hydrogen is considered to be a promising chemical fuel for renewable energy applications due to its high energy density and zero environmental pollution. Water electrolysis is an efficient method for hydrogen production, but this method mainly relies on cathode catalysts. The precious metal platinum is the best hydrogen evolution catalyst so far, but its large-scale commercial application is limited due to the limited reserves and high price of platinum. In rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCY02E60/50
Inventor 王强斌汪昌红胡峰杨红超张叶俊
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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