Unlock instant, AI-driven research and patent intelligence for your innovation.

Tantalum compound electrocatalyst based on platinum oxide alloy, preparation method and application thereof

A technology of compound electrolysis and platinum oxide, which is applied in the field of electrocatalysis, can solve the problems of electrolyzed water and ozone performance degradation, and achieve the effects of low cost, improved stability, and enhanced activity

Active Publication Date: 2019-03-29
ZHEJIANG UNIV OF TECH
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that after prolonged electrolysis, β-PbO 2 The particle size of the particles drops sharply, and the recrystallization process under high potential conditions leads to the formation of many small nano-sized particles on the surface of the original particles, causing the decline in the performance of electrolyzed water to generate ozone

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tantalum compound electrocatalyst based on platinum oxide alloy, preparation method and application thereof
  • Tantalum compound electrocatalyst based on platinum oxide alloy, preparation method and application thereof
  • Tantalum compound electrocatalyst based on platinum oxide alloy, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: PtNiO 2 / Ta 3 N 5 Synthesis

[0030] 1) Take tantalum powder and place it in a muffle furnace, and bake it in an air atmosphere at a temperature of 500 °C for 5 hours to obtain a white powder, which is tantalum oxide;

[0031] 2) Step 1) The obtained tantalum oxide, sodium chloride and sodium fluoride are mixed in a molar ratio of 4:9:1, and a small amount of ethanol is added to the obtained solid mixture to grind thoroughly (ethanol wets the surface of the solid mixture), and then placed in 550 ℃ in a muffle furnace for 4 h;

[0032] 3) Put the powder calcined in step 2) in a tube furnace, and calcined in an ammonia atmosphere at a calcining temperature of 900 °C, a calcining time of 7 hours, and an ammonia gas flow rate of 200 mL / min to obtain tantalum nitride nanorod catalysts;

[0033] 4) The tantalum nitride nanorod catalyst obtained in step 3) was washed 4 times with deionized water, and then dried in a vacuum oven at 60 °C for 12 h;

[0034] 5) A...

Embodiment 2

[0039] Example 2: PtCoO 2 / Ta 3 N 5 Synthesis

[0040] 1) Take tantalum powder and place it in a muffle furnace, and bake it in an air atmosphere at a temperature of 500 °C for 5 hours to obtain a white powder, which is tantalum oxide;

[0041] 2) Step 1) The obtained tantalum oxide, sodium chloride and sodium fluoride are mixed in a molar ratio of 4:9:1, and a small amount of ethanol is added to the obtained solid mixture to grind thoroughly (ethanol wets the surface of the solid mixture), and then placed in 550 ℃ in a muffle furnace for 4 h;

[0042] 3) Put the powder calcined in step 2) in a tube furnace, and calcined in an ammonia atmosphere at a calcining temperature of 900 °C, a calcining time of 7 hours, and an ammonia gas flow rate of 200 mL / min to obtain tantalum nitride nanorod catalysts;

[0043] 4) The tantalum nitride nanorod catalyst obtained in step 3) was washed 4 times with deionized water, and then dried in a vacuum oven at 60 °C for 12 h;

[0044] 5) A...

Embodiment 3

[0048] Example 3: PtFeO 2 / Synthesis of TaON

[0049] 1) Take tantalum powder and place it in a muffle furnace, and roast it in an air atmosphere at a roasting temperature of 500°C and a roasting time of 5 hours to obtain a white powder, which is tantalum oxide;

[0050] 2) Step 1) The obtained tantalum oxide, sodium chloride and sodium fluoride are mixed in a molar ratio of 4:9:1, and a small amount of ethanol is added to the obtained solid mixture to grind thoroughly (ethanol wets the surface of the solid mixture), and then placed in 550 ℃ in a muffle furnace for 4 h;

[0051] 3) The powder calcined in step 2) was placed in a tube furnace, and calcined in an ammonia atmosphere at a calcining temperature of 850 °C, a calcining time of 5 hours, and an ammonia gas flow rate of 50 mL / min to obtain granular Tantalum oxynitride catalyst;

[0052] 4) The granular tantalum oxynitride catalyst obtained in step 3) was washed 4 times with deionized water, and then dried in a vacuum...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a tantalum compound electrocatalyst based on a platinum oxide alloy, a preparation method and an application thereof. The tantalum compound electrocatalyst comprises a tantalumcompound and a platinum oxide-non-noble metal oxide supported on the tantalum compound, the tantalum compound is one or a mixture of two or more of tantalum oxide, tantalum nitride, and tantalum oxynitride, and the non-precious metal is at least one metal element of iron, cobalt, nickel, copper, manganese, and zinc; and in the tantalum compound electrocatalyst, the loading amount of platinum oxide / non-precious metal oxide is 8% to 12%. The method synthesizes the novel platinum oxide alloy supported tantalum compound electrocatalyst by simple process and low cost, and in a linear sweep voltammetry test for producing ozone by electrolyzed water, the current density of the tantalum compound electrocatalyst is superior to the conventional PbO2, and the tantalum compound electrocatalyst has agood application prospect.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a platinum oxide alloy-based tantalum compound electrocatalyst and a preparation method and application thereof. Background technique [0002] Ozone has a strong oxidizing and bactericidal ability, and the product after the reaction is oxygen that is beneficial to the human body, so it is widely used in drinking water treatment, sewage treatment, chemical oxidation, medical care, breeding and other fields. Ozone is highly reactive under natural conditions, so it must be prepared on-site. Because many factors, such as oxygen source (air or pure oxygen), ambient temperature and the presence of impurities in the air, will affect the efficiency of ozone generation by the corona discharge method, so the ozone generation efficiency of air and pure oxygen is not 5% (mass percentage). [0003] The traditional ozone electrolysis generation technology is a method of electrolyzin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C25B1/13C25B11/06
CPCC25B1/13C25B11/093
Inventor 王建国严逸珑钟兴
Owner ZHEJIANG UNIV OF TECH