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Electrocatalyst with mixed precious metal and perovskite oxides

A perovskite oxide, perovskite technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of high cost, low catalytic activity of oxygen reduction reaction, poor catalytic oxygen evolution reaction activity, etc. The effect of precious metal consumption, cost reduction, and simple method

Active Publication Date: 2014-05-21
辽宁沐与康中氢燃料电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the field of electrochemistry, noble metals have very good catalytic activity for oxygen reduction reaction (ORR), especially platinum noble metals are the best oxygen reduction catalysts, but their catalytic activity for oxygen evolution reaction (OER) is relatively poor; noble metal Ru Or transition metals such as Ir and their oxides are high catalysts for oxygen evolution reaction (OER), but have low catalytic activity for oxygen reduction reaction (ORR)
These noble metal catalysts cannot meet the requirements of large-scale applications due to their high cost and their single catalytic effect.

Method used

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  • Electrocatalyst with mixed precious metal and perovskite oxides
  • Electrocatalyst with mixed precious metal and perovskite oxides
  • Electrocatalyst with mixed precious metal and perovskite oxides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 4mg of Pt / C (precious metal mass fraction accounts for 40%, conductive carbon black accounts for 60%, the following examples 2-embodiment 10 are all like this) and 16mg BSCF / C (perovskite oxide mass fraction accounts for 40%) , conductive carbon black accounted for 60%, the following examples 2-embodiment 10 are all the same) according to the mass ratio of 1:4, mixed and dispersed in 1mL of ethanol, and then added Nafion (mass fraction 5%) 0.1mL, ultrasonic Shake for 1 h to make the mixture uniform to obtain a slurry for preparing the catalyst. The electrode preparation and electrode testing process are the same as those in Comparative Example 1.

[0043] figure 2 (a) is the SEM image of the mixed Pt and BSCF, and the results show that the nanoscale Pt is relatively uniformly distributed on the surface of the BSCF.

Embodiment 2

[0045] Weigh 10mg of Pt / C and 10mg of BSCF / C according to the mass ratio of 1:1, mix and disperse them in 1mL of ethanol, then add 0.1mL of Nafion (mass fraction 5%) to it, and ultrasonically oscillate for 1h to mix evenly to obtain the prepared catalyst. slurry. The electrode preparation and electrode testing process are the same as in Example 1.

Embodiment 3

[0047] Weigh 16mg of Pt / C and 4mg of BSCF / C according to the mass ratio of 4:1, mix and disperse in 1mL of ethanol, then add 0.1mL of Nafion (mass fraction 5%) to it, and ultrasonically oscillate for 1h to make the mixture uniform to obtain the prepared catalyst. slurry. The electrode preparation and electrode testing process are the same as in Example 1.

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Abstract

The invention relates to an electrocatalyst with mixed precious metal and perovskite oxides. The electrocatalyst with mixed precious metal and perovskite oxides is characterized in that precious metal and perovskite oxides are mixed mechanically at different ratios so as to prepare an electrode, thereby obtaining the electrocatalyst with high ORR (oxygen reduction reaction) and OER (oxygen evolution reaction); the single precious metal is an excellent oxygen reduction catalyst, but the catalytic oxygen evolution reaction is relatively poor; the perovskite oxides have relatively high catalytic activity to the oxygen evolution reaction, and have very flow catalytic activity to the ORR. Aiming at the situation, the catalyst obtained by the invention has high ORR and OER activity at the same time only by a simple mixing method, and can act as a double-effect oxygen electrode for the fields of integrated recyclable fuel batteries, chargeable metal-air batteries, water electrolysis and the like.

Description

technical field [0001] The invention relates to energy storage batteries, in particular to an electrocatalyst mixed with noble metals and perovskite oxides, which has high oxygen reduction (ORR) and oxygen evolution (OER) activities, and can be used for renewable fuel cells, rechargeable metal - Electrocatalysts for air batteries. Background technique [0002] In today's society, energy is the driving force for the development of the national economy and the basis for the country's sustainable development. However, with the vigorous development of industry and the continuous improvement of people's lives, human demand for energy is increasing day by day. However, in today's world, the excessive development and use of fossil energy has caused energy depletion and serious environmental pollution. In order to realize the sustainable development of mankind, the development and utilization of economical and clean new energy is the theme of world energy technology in the 21st ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 邵宗平朱印龙许晓敏苏超周嵬冉然
Owner 辽宁沐与康中氢燃料电池有限公司
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