Non-noble metal catalytic material loaded core-shell catalyst, preparation method and application thereof

A core-shell catalyst and catalytic material technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of inability to fully adapt to the rapid development and application status, backward catalytic performance and stability, and many half-cell test reports. The effect of improving competitiveness, low cost, high hydrophobicity

Active Publication Date: 2019-02-22
CHINA-SINGAPORE INT JOINT RES INST
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  • Abstract
  • Description
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Problems solved by technology

But on the other hand, the overall catalytic performance and stability of various non-precious metal catalysts including transition metals and nitrogen-doped carbon materials are still lagging behind platinum-based catalysts, and they cannot compete with the latter and completely replace the latter. The development of various non-platinum catalysts is mostly limited to the laboratory level, and

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  • Non-noble metal catalytic material loaded core-shell catalyst, preparation method and application thereof

Examples

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Example Embodiment

[0047] Example 1

[0048] Preparation of cobalt and nitrogen doped carbon and nitrogen carrier materials (CoO x / C-N) supported platinum-cobalt core-shell (Co@Pt) catalyst

[0049] In the first step, a carbon-nitrogen carrier material doped with cobalt and nitrogen (CoO x / C-N):

[0050] In a typical example of preparing cobalt-nitrogen doped carbon-nitrogen carrier materials, Pentaethylenehexamine is used as a carbon source and a nitrogen source, and cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) is used as a source of cobalt. First, dissolve 6.0 g of pentaethylene hexaamine in 50 ml of water, stir for 0.5 hours to mix uniformly; then add 6.5 g of pre-ground and dried MCM 41, ultrasonically shake and stir for 2 hours to make it uniformly dispersed and keep stirring; 2.3g polyvinylpyrrolidone (PVP) was dissolved in 50ml water, 1.5g cobalt nitrate and 1.6g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), ultrasonically oscillate and stir for one hour to make the three uniformly mixed; then slowly drop the ...

Example Embodiment

[0053] Example 2

[0054] Preparation of iron, cobalt and nitrogen doped carbon and nitrogen carrier material (FeCoO x / C-N) supported platinum iron cobalt core shell (FeCo@Pt) catalyst

[0055] The first step is to prepare iron-cobalt-nitrogen-doped carbon-nitrogen carrier material (FeCoO x / C-N):

[0056] In a typical example of preparing iron-cobalt-nitrogen bimetal-doped carbon-nitrogen carrier materials, Pentaethylenehexamine (PEHA) is used as a carbon source and a nitrogen source, and iron nitrate (Fe(NO 3 ) 3 ·9H 2 O) Cobalt Nitrate (Co(NO 3 ) 2 ·6H 2 O) is used as a metal source. First dissolve 8.0 g of pentaethylene hexaamine in 80 ml of water, stir for 0.5 hours to mix uniformly; then add 10.5 g of pre-ground and dried MCM41, ultrasonically shake and stir for 2 hours to make it evenly dispersed and keep stirring; after that, add 3.3 Grams of polyvinylpyrrolidone (PVP) was dissolved in 50 ml of water, and 1.5 g of iron nitrate, 1.0 g of cobalt nitrate and 2.0 g of zinc nitr...

Example Embodiment

[0059] Example 3

[0060] Preparation of cobalt molybdenum nitrogen doped carbon nitrogen carrier material (CoMoO x / C-N) supported platinum cobalt molybdenum core-shell (CoMo@Pt) catalyst

[0061] The first step is to prepare cobalt molybdenum nitrogen doped carbon nitrogen carrier material (CoMoO x / C-N):

[0062] 25g of sodium chloride was dissolved in 100ml of deionized water, and then 9.5g of pentaethylenehexamine was added dropwise to it. After stirring for one hour, 15g of MCM-41 was added and ultrasonically dispersed for two hours to obtain MCM- 41 ultrafine slurry. 20 ml of ethanol dissolve 1.8 g of cobalt chloride (CoCl 2 ·6H 2 O) and 3.1 grams of ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 ·4H 2 O), mix well (the ratio of cobalt and molybdenum atomic weight is 3), then add to the above MCM-41 slurry, and stir overnight. The viscous paste after most of the solvent was removed by rotary evaporation at 50 degrees was quickly frozen, and then freeze-dried to remove the remaining...

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Abstract

The invention discloses a non-noble metal catalytic material loaded core-shell catalyst, a preparation method and an application thereof. The catalyst comprises a non-noble metal doped carbon-nitrogencarrier catalytic material and core-shell particles loaded to the surface of the carbon-nitrogen carrier catalytic material. The catalyst is the core-shell catalyst of the non-noble carbon-nitrogen carrier catalytic material loaded with noble metals, has various catalytic active sites and relatively good catalytic activity and excellent transfer attributes of substances such as electrons and gasand hydrophobicity, and is low in cost. The preparation method can be used for preparing the core-shell catalytic particles by fully using residual non-noble metals in the non-noble metal catalyst preparation process, and can save the tie, simplify the electrode preparation steps and improve the activity of the catalyst and the utilization ratio of platinum. The catalyst is characterized in that the catalyst has the advantages of being low in platinum content, high in platinum utilization ratio, low in cost, high in catalytic activity and various in catalytic active sites and the compound catalyst has the advantages of being porous and orderly, relatively good in lyophobic characteristic, good gas and electron transfer characteristic integrally and the like.

Description

technical field [0001] The invention relates to the technical field of fuel cell catalytic materials, and more specifically relates to a core-shell catalyst supported by a non-noble metal catalytic material, a preparation method and an application thereof. Background technique [0002] Energy production, supply and consumption methods not only affect the economic development level of an economy and people's living standards, but are also particularly related to the earth's environment and climate change. The contradiction between limited fossil energy reserves, especially oil, gas and coal, and increasing energy consumption is becoming more and more prominent. Especially with the continuous increase of the total population of the earth, the current energy consumption mode that is highly dependent on fossil fuels not only seriously increases the burden on the earth, rapidly consumes non-renewable resources such as coal, oil and natural gas, but also brings great harm to the e...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/92
CPCH01M4/8657H01M4/88H01M4/921H01M4/926Y02E60/50
Inventor 周卫江曾少华余金礼
Owner CHINA-SINGAPORE INT JOINT RES INST
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