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A kind of preparation method and application of supported bimetallic nanometer material

A technology of bimetallic nano- and nano-materials, applied in metal processing equipment, nanotechnology, nanotechnology, etc., can solve the problems of difficulty in achieving the commercial goal of vehicle-mounted mobile hydrogen storage materials, poor hydrogen absorption/desorption kinetics, and high dehydrogenation temperature

Active Publication Date: 2021-09-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, MgH 2 Hydrogen-based hydrogen storage materials have received extensive attention due to their relatively high theoretical hydrogen storage capacity, but due to their thermodynamic stability, high dehydrogenation temperatures (>400 °C) and poor hydrogen absorption / desorption kinetics, currently MgH 2 It is still difficult to achieve the commercial target of vehicle-mounted mobile hydrogen storage materials stipulated by the US Department of Energy

Method used

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  • A kind of preparation method and application of supported bimetallic nanometer material
  • A kind of preparation method and application of supported bimetallic nanometer material
  • A kind of preparation method and application of supported bimetallic nanometer material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Calculate and weigh 0.095g PdCl according to the molar ratio of Pd and Ni elements of 9:1 2 and 0.0147g NiCl 2 ·6H 2 O, put into the beaker that capacity is 15ml and add 10ml dehydrated alcohol and 0.4ml HCl (37wt.%), take by weighing 0.06g CMK-3 (Pd, Ni element total loading in CMK-3 after magnetic stirring 1h 50wt.%) was added into the solution and then magnetically stirred for 1 h. Place the fully impregnated suspension into a vacuum drying oven, set it at 80°C after vacuuming and keep it warm for 20 hours, during which time it is vacuumed twice. The vacuum-dried powder was placed in Al 2 o 3 In the crucible, the hydrogenation reduction treatment is carried out by a tube furnace, and the specific process is: under a hydrogen-argon mixed atmosphere (v (H2) / v (Ar) =1:9, control the mixed gas flow rate to 80sccm), heat to 400°C at a heating rate of 5°C / min and hold for 3h, and finally get Pd 90 Ni 10 / CMK-3 sample, the XRD pattern of the sample is as followsfig...

Embodiment 2

[0037] Calculate and weigh 0.0809g PdCl according to the molar ratio of Pd and Ni elements being 7:3 2 and 0.0465g NiCl 2 ·6H 2 O, put into the beaker that capacity is 15ml and add 10ml dehydrated alcohol and 0.4ml HCl (37wt.%), take by weighing 0.06g CMK-3 (Pd, Ni element total loading in CMK-3 after magnetic stirring 1h 50wt.%) was added into the solution and then magnetically stirred for 1 h. Place the fully impregnated suspension into a vacuum drying oven, set it at 80°C after vacuuming and keep it warm for 20 hours, during which time it is vacuumed twice. The vacuum-dried powder was placed in Al 2 o 3 In the crucible, the hydrogenation reduction treatment is carried out by a tube furnace, and the specific process is: under a hydrogen-argon mixed atmosphere (v (H2) / v (Ar) =1:9, control the mixed gas flow rate to 80sccm), heat to 400°C at a heating rate of 5°C / min and hold for 3h, and finally get Pd 70 Ni 30 / CMK-3 sample, the XRD pattern of the sample is as follow...

Embodiment 3

[0039] Calculate and weigh 0.064g PdCl according to the molar ratio of Pd and Ni elements being 5:5 2 and 0.0864g NiCl 2 ·6H 2 O, put into the beaker that capacity is 15ml and add 10ml dehydrated alcohol and 0.4ml HCl (37wt.%), take by weighing 0.06g CMK-3 (Pd, Ni element total loading in CMK-3 after magnetic stirring 1h 50wt.%) was added into the solution and then magnetically stirred for 1 h. Place the fully impregnated suspension into a vacuum drying oven, set it at 80°C after vacuuming and keep it warm for 20 hours, during which time it is vacuumed twice. The vacuum-dried powder was placed in Al 2 o 3 In the crucible, the hydrogenation reduction treatment is carried out by a tube furnace, and the specific process is: under a hydrogen-argon mixed atmosphere (v (H2) / v (Ar) =1:9, control the mixed gas flow rate to 80sccm), heat to 400°C at a heating rate of 5°C / min and hold for 3h, and finally get Pd 50 Ni 50 / CMK-3 sample, the XRD pattern of the sample is as follows...

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Abstract

The invention discloses a supported bimetallic nanomaterial, which is prepared by uniformly distributing nano-Pd particles and nano-Ni particles in a mesoporous carbon material CMK-3, wherein the molar ratio of Pd and Ni is: 1:9~9:1, the total loading of Pd and Ni elements in CMK‑3 is 50~60wt.%. Pd prepared by the present invention x Ni 100‑x / CMK‑3 material, nano metal particles are uniformly loaded in CMK‑3 without agglomeration. The material for MgH 2 The dehydrogenation temperature is significantly reduced, the initial dehydrogenation temperature is as low as 125 ° C, and the dehydrogenation can be cut off at 280 ° C, and its hydrogen absorption kinetics has been improved. It can quickly absorb hydrogen 3wt.%H at 150 ° C and 3 MPa. 2 above. The particle size distribution of the material particles is uniform, effectively avoiding the agglomeration among the metal particles.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a preparation method of a CMK-3 loaded metal nanomaterial additive, and also relates to the effect of the additive material on MgH 2 Improvement of hydrogen storage performance of hydrogen storage materials. [0002] technical background [0003] In recent years, MgH 2 Hydrogen-based hydrogen storage materials have received extensive attention due to their relatively high theoretical hydrogen storage capacity, but due to their thermodynamic stability, high dehydrogenation temperatures (>400 °C) and poor hydrogen absorption / desorption kinetics, currently MgH 2 It is still difficult to achieve the commercial target of vehicle-mounted mobile hydrogen storage materials stipulated by the US Department of Energy. Through a large number of literature surveys, it is found that the addition of some transition metal particles or metal oxides can significa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/26B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/26B22F1/054
Inventor 张耀陈岗罗旭周梦婷高蕾陈俊宇
Owner SOUTHEAST UNIV