Platinum-based monatomic electrocatalytic material as well as preparation method and application thereof

An electrocatalytic material and atomic technology, applied in the field of catalysis, can solve the problems of unfavorable commercial application, unsatisfactory use, high production cost, and achieve the effects of long-term stable electrocatalytic performance, efficient doping, and simple preparation method.

Active Publication Date: 2021-12-28
WEST CHINA HOSPITAL SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw material of the nano-electrocatalyst reported in the literature uses expensive Au, which is high in production cost and is not conducive to commercial application; in addition, the literature does not report that its nano-electrocatalyst has a higher performance than commercial platinum-carbon in alkaline solution. More excellent hydrogen evolution catalytic performance, unable to meet the needs of use in a wide pH range

Method used

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  • Platinum-based monatomic electrocatalytic material as well as preparation method and application thereof
  • Platinum-based monatomic electrocatalytic material as well as preparation method and application thereof
  • Platinum-based monatomic electrocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1 Preparation of platinum-based single-atom electrocatalyst Pt doped @WC x

[0053] according to figure 1 Schematic diagram of the preparation of platinum-based single-atom electrocatalyst Pt doped @WC x , the specific operation is as follows:

[0054] 1. Na 5 [H 3 PTW 6 o 24 ]·20H 2 Preparation of O

[0055] First, add 0.3 g of H to 20 mL of deionized water at 50 °C 2 Pt(OH) 6 , stir well, then add granular NaOH to make H 2 Pt(OH) 6 Completely dissolved to obtain a clear light yellow solution, named solution A. Add 2.0g Na to 20mL deionized water at 50℃ 2 WO 4 2H 2 O, stir evenly to obtain solution B. Solutions A and B were then mixed using 1M HNO 3 Keep the pH of the solution at 6.5 for 5 min. After evaporation, concentration and cooling, light yellow Na 5 [H 3 PTW 6 o 24 ]·20H 2 O crystals.

[0056] 2. Precursor PtW 6 o 24 Preparation of @DA

[0057] Na 5 [H 3 PTW 6 o 24 ]·20H 2 O (140mg, 0.065mmoL) and dopamine hydrochloride...

Embodiment 2

[0060] Embodiment 2 prepares platinum-based single-atom electrocatalyst

[0061] With reference to the preparation method of Example 1, a precursor and a platinum-based single-atom electrocatalyst were prepared, the difference being that the Na in step 1 5 [H 3 PTW 6 o 24 ]·20H 2 The mass ratio of O and dopamine hydrochloride was changed from 1:2 to 1:1.

Embodiment 3

[0062] Example 3 Preparation of platinum-based single-atom electrocatalyst

[0063] With reference to the preparation method of Example 1, a precursor and a platinum-based single-atom electrocatalyst were prepared, the difference being that the Na in step 1 5 [H 3 PTW 6 o 24 ]·20H 2 The mass ratio of O and dopamine hydrochloride was changed from 1:2 to 1:4.

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Abstract

The invention provides a platinum-based monatomic electrocatalytic material as well as a preparation method and application thereof, belonging to the field of electrocatalysis. The platinum-based monatomic electrocatalytic material is prepared by taking an Anderson type heteropolyacid compound, dopamine or a salt thereof as raw materials, wherein the Anderson type heteropolyacid compound is Anderson type heteropolyacid or a hydrate thereof, and a salt of the Anderson type heteropolyacid or a hydrate thereof; and the structure of the Anderson type heteropolyacid is H8PtR6O24, and R is a transition metal. The electrocatalytic hydrogen evolution performance of the platinum-based monatomic electrocatalyst in an acid solution is equivalent to the electrocatalytic hydrogen evolution performance of commercial platinum carbon, and the electrocatalytic hydrogen evolution performance of the platinum-based monatomic electrocatalyst in an alkaline solution is remarkably higher than the electrocatalytic hydrogen evolution performance of the commercial platinum carbon. Meanwhile, the long-term durability of the platinum-based monatomic electrocatalyst in the acid solution and the alkaline solution is remarkably superior to the long-term durability of commercial platinum carbon, and the mass activity and the catalytic conversion frequency of the platinum-based monatomic electrocatalyst are also remarkably superior to the mass activity and the catalytic conversion frequency of the commercial platinum carbon. The platinum-based monatomic electrocatalyst prepared in the invention has high activity and long-term stable electrocatalytic performance in a wide pH range, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of catalysis, and in particular relates to a platinum-based single-atom electrocatalytic material and its preparation method and application. Background technique [0002] Platinum (Pt), as an electrochemical catalytic material with excellent performance, is widely used in many fields such as industrial catalysis, aerospace, electronics, and scientific research. As a very important part of the catalytic reaction, electrochemical catalysis has applications in fuel cell vehicles, degradation of organic pollutants, biosensors, carbon monoxide oxidation, electrocatalytic reduction of carbon dioxide, industrial hydrogen production by electrolysis of water, production of oxygen by industrial electrolysis of water, etc. very important application. [0003] Electrocatalytic water splitting is an important technology for hydrogen production. Pt is currently considered to be the most ideal electrocatalytic water splitting hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/00C25B1/02C25B11/093H01M4/92
CPCB01J35/0046B01J35/0033B01J27/22C25B1/02C25B11/093H01M4/925Y02E60/50
Inventor 马田李爽程冲邱逦马朗周密何超朱笔挥唐远姣曹素娇
Owner WEST CHINA HOSPITAL SICHUAN UNIV
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