Check patentability & draft patents in minutes with Patsnap Eureka AI!

Preparation method and application of perovskite oxide containing IrO2

A technology of perovskite oxides and products, applied in the field of electrocatalysis, can solve the problems of long preparation time, can not well meet the water splitting hydrogen production, can not be mass-produced, etc., to achieve the improvement of electrocatalytic performance, wide industrial production, The effect of not harsh reaction conditions

Pending Publication Date: 2020-09-11
WUYI UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantages are that only the perovskite oxide doped with general transition metal elements is used as an electrocatalyst, and its electrocatalytic performance is limited. The overpotential required for hydrogen production from water splitting is higher than 1.65V (Gao Chen, Zhiwei Hu, Yanping Zhu, et.al.Journal of Materials ChemistryA, 2018, 6(21): 9854-9859), so it still cannot meet the needs of water splitting hydrogen production
However, the disadvantages of this technology are: the preparation method adopts hydrothermal method or sol-gel method, the preparation time is long, the steps are complicated, and the single preparation of RuO 2 The amount of / LFRO electrocatalyst is very small; the reduction time is lengthy, and reoxidation is required after reduction; the catalytic effect is not significantly improved compared with the perovskite oxide without metal oxide doping, from the catalytic performance, In terms of preparation equivalent and preparation time, it still cannot meet the needs of industrialization
[0005] Therefore, it is urgent to find a new method for the preparation of perovskite oxides. The obtained product can be used as an electrocatalyst in the field of OER. Defects that cannot meet the needs of actual industrialization

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
  • Preparation method and application of perovskite oxide containing IrO2
  • Preparation method and application of perovskite oxide containing IrO2
  • Preparation method and application of perovskite oxide containing IrO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 contains IrO 2 Preparation of Perovskite Oxide 1

[0037] Including the following steps:

[0038] (a) the raw material La 2 o 3 (1.30g, 0.004mol), SrCO 3 (0.30g, 0.002mol), Co 2 o 3 (0.79g, 0.00475mol) and IrO 2 (0.11 g, 0.0005 mol) was placed in a container and ground.

[0039] (b) Add 10 mL of absolute ethanol to the above ground substance, and continue grinding for 3 h to form mixture A.

[0040] (c) The mixture A was put into a muffle furnace, calcined at 750° C. for 5 hours and then ground for 30 minutes to obtain 2.50 g of a mixture B.

[0041] (d) Put the mixture B into the tube furnace, under H 2 and N 2 (H 2 and N 2 In an atmosphere with a volume ratio of 5:95), calcined at 500°C for 1 hour and then ground for 20 minutes to obtain an IrO-containing 2 The perovskite oxide 1 is 2.3685g, and the particle size is 150nm.

[0042] Figure 1(a) shows the IrO-containing 2 The X-ray diffraction pattern of perovskite oxide 1, in which the diffract...

Embodiment 2

[0044] Example 2 contains IrO 2 Preparation of Perovskite Oxide 2

[0045] Including the following steps:

[0046] (a) the raw material La 2 o 3 (1.30g, 0.004mol), SrCO 3 (0.30g, 0.002mol), Co 2 o 3 (0.75g, 0.0045mol) and IrO 2 (0.22g, 0.001mol) was placed in a container and ground.

[0047] (b) Add 15 mL of absolute ethanol to the above ground substance, and continue grinding for 1 h to form mixture A.

[0048] (c) The mixture A was put into a muffle furnace, calcined at 1200° C. for 10 h and then ground for 50 min to obtain 2.57 g of a mixture B.

[0049] (d) Put the mixture B into the tube furnace, under H 2 and N 2 (H 2 and N 2 In an atmosphere with a volume ratio of 20:80), calcined at 900°C for 2 hours and then ground for 20 minutes to obtain an IrO-containing 2 The perovskite oxide 2 is 2.49g, and the particle size is 400nm.

[0050] Figure 1(b) shows the IrO-containing 2 The X-ray diffraction pattern of perovskite oxide 2, reflecting the IrO-containing ...

Embodiment 3

[0052] Example 3 contains IrO 2 Preparation of Perovskite Oxide 3

[0053] Including the following steps:

[0054] (a) the raw material La 2 o 3 (1.30g, 0.004mol), SrCO 3 (0.30g, 0.002mol), Co 2 o 3 (0.66g, 0.004mol) and IrO 2 (0.45g, 0.002mol) was placed in a container and ground.

[0055] (b) Add 20 mL of acetone to the above ground substance, and continue grinding for 6 h to form mixture A.

[0056] (c) The mixture A was put into a muffle furnace, calcined at 1000° C. for 8 hours and then ground for 20 minutes to obtain 2.71 g of a mixture B.

[0057] (d) Put the mixture B into the tube furnace, under H 2 and N 2 (H 2 and N 2 In an atmosphere with a volume ratio of 15:85), calcined at 750°C for 3 hours and then ground for 30 minutes to obtain an IrO-containing 2 The perovskite oxide 3 is 2.70 g. The particle size is 250 nm.

[0058] Figure 1(c) shows the IrO-containing 2 The X-ray diffraction pattern of the perovskite oxide 3, illustrating the identification...

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

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of perovskite oxide containing IrO2. The method comprises the following steps of: (a) mixing the four metal oxides La2O3, SrCO3, Co2O3 and IrO2, then performing grinding, and adding an organic solvent to form a mixture A; (b) calcining the mixture A to obtain a mixture B; and (c) roasting the mixture B in inert gas containing reducing gas to obtain a product. The prepared product is applied to the field of OER as an electrocatalyst, has excellent catalytic performance, and can also overcome the defects that an existing manufacturing method is longin preparation time, cannot achieve mass production and the like and cannot meet actual industrial requirements.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, in particular to an IrO-containing 2 Preparation methods and applications of perovskite oxides. Background technique [0002] With the rapid development of society, the demand for energy is also increasing, oil, coal and other resources have been over-exploited, and traditional energy has also brought serious environmental pollution to the society. Therefore, the development of new energy sources is an inevitable requirement of the national sustainable development strategy. Hydrogen is an ideal alternative energy source because of its high combustion value and clean and pollution-free combustion products. Hydrogen production through water splitting is one of the most attractive methods. Hydrogen production by electrolysis of water involves an endothermic anodic oxygen evolution reaction (OER), which requires a high overpotential to break through the energy barrier to activate the reaction. The...

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): B01J23/89B01J35/02C25B11/06C25B1/04
CPCB01J23/894C25B11/04C25B1/04B01J2523/00B01J35/33B01J35/40B01J2523/24B01J2523/3706B01J2523/827Y02E60/36
Inventor 张弛梁一孟顶顶谢卓鸿王峥贺祥梁萍张忠华
Owner WUYI UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com