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Electrocatalyst for B-doped perovskite oxide and preparation method thereof

An electrocatalyst and perovskite technology, which is applied in the field of electrocatalyst and preparation of B-doped perovskite oxides, to achieve the effect of improving electrocatalytic performance, stable physical and chemical properties, and low-cost and efficient preparation

Active Publication Date: 2019-06-21
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the existing preparation of perovskite oxide electrocatalysts, the purpose of the present invention is to provide a kind of B-doped SrCo 1-x B x o 3-δ Preparation method of room temperature electrocatalyst

Method used

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  • Electrocatalyst for B-doped perovskite oxide and preparation method thereof
  • Electrocatalyst for B-doped perovskite oxide and preparation method thereof
  • Electrocatalyst for B-doped perovskite oxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A preparation method of an electrocatalyst of B-doped perovskite oxides, comprising the following steps:

[0038] (1) 0.05mol of SrCO 3 , 0.0245molCo 2 o 3 and 0.001mol of H 3 BO 3 Mix to obtain powder a;

[0039] (2) Put the powder a obtained in step (1) into a zirconia ball mill jar, pour 200mL of absolute ethanol into it, weigh the zirconia balls according to the mass ratio of zirconia balls and powder a to 2:1, and Add to the zirconia ball mill jar;

[0040] (3) Put the zirconia ball mill jar in step (2) into a high-energy ball mill, and the high-energy ball mill ball mills at a speed of 250r / min for 2h, then take out the obtained slurry after ball milling, and place it in a drying oven at 75°C Dry for 24 hours, then hand-grind in a mortar to obtain powder b;

[0041] (4) Put the powder b obtained in step (3) into a muffle furnace, bake it at 800°C for 5 hours in an air atmosphere, take it out, and grind it by hand in a mortar for 30 minutes to obtain phase-f...

Embodiment 2

[0046] A preparation method of an electrocatalyst of B-doped perovskite oxides, comprising the following steps:

[0047] (1) 0.05mol of SrCO 3 , 0.022molCo 2 o 3 and 0.006mol of H 3 BO 3 Mix to obtain powder a;

[0048] (2) Put the powder a obtained in step (1) into a zirconia ball mill jar, pour 100mL of absolute ethanol into it, weigh the zirconia balls according to the mass ratio of zirconia balls and powder a to 8:1, and Add to the zirconia ball mill jar;

[0049] (3) Put the zirconia ball mill jar in step (2) into a high-energy ball mill, and the high-energy ball mill mills at a speed of 350r / min for 3h, then takes out the slurry obtained after ball milling, and puts it in a drying oven at 80°C Dry for 24 hours, then hand-grind in a mortar to obtain powder b;

[0050] (4) Put the powder b obtained in step (3) into a muffle furnace, bake it at 900°C for 5 hours in an air atmosphere, take it out, and grind it by hand in a mortar for 40 minutes to obtain phase-formed ...

Embodiment 3

[0055] A preparation method of an electrocatalyst of B-doped perovskite oxides, comprising the following steps:

[0056] (1) 0.05mol of SrCO 3 , 0.02125mol Co 2 o 3 and 0.0025mol of H 3 BO 3 Mix to obtain powder a;

[0057] (2) Put the powder a obtained in step (1) into a zirconia ball mill jar, pour 200mL of absolute ethanol into it, weigh the zirconia balls according to the mass ratio of zirconia balls and powder a to 15:1, and Add to the zirconia ball mill jar;

[0058] (3) Put the zirconia ball mill jar in step (2) into a high-energy ball mill, and the high-energy ball mill mills at a speed of 450r / min for 5h, then takes out the slurry obtained after ball milling, and puts it in a drying oven at 90°C Dry for 24 hours, then hand-grind in a mortar to obtain powder b;

[0059] (4) Put the powder b obtained in step (3) into a muffle furnace, bake it at 1200°C for 8 hours in an air atmosphere, take it out, and grind it by hand in a mortar for 50 minutes to obtain phase-f...

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Abstract

The invention discloses a preparation method of an electrocatalyst for B-doped perovskite oxide. The electrocatalyst for the B-doped perovskite oxide is prepared through combination of ball-milling mixing and high-temperature calcining. Compared with a conventional electrocatalyst prepared from precious metals, the electrocatalyst prepared from the cheap B-doped perovskite oxide is greatly loweredin the manufacturing cost, and is very suitable for industrial large-scale production. Moreover, the prepared electrocatalyst has high ORR (Oxygen Reduction Reaction) and OER (Oxygen Evolution Reaction) performance, and stable product performance. The electrocatalyst can be applied in the fields of metal-air batteries, fuel cells and water decomposition hydrogen production.

Description

technical field [0001] The invention belongs to the field of batteries, in particular to a B-doped perovskite oxide electrocatalyst and a preparation method thereof. Background technique [0002] With the aggravation of environmental pollution and energy crisis, it is imminent to develop and utilize new energy conversion and storage technologies. Among many new energy key technologies, metal-air batteries, fuel cells and water splitting hydrogen production are current research hotspots and have great application prospects. Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the most critical reactions in metal-air batteries, fuel cells and water splitting for hydrogen production. ORR and OER reactions involve multi-step complex electron transfer processes, and the reaction kinetics are extremely slow, so it is extremely critical to find oxygen electrocatalysts that can increase the reaction rate; in metal-air batteries, bifunctional oxygen electrocatalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J23/78C01B3/04
CPCY02E60/36Y02E60/50
Inventor 张弛谢卓鸿张忠华梁萍何鑫
Owner WUYI UNIV