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Pd-based transition-metal-doped binary nano-porous material and preparation method thereof

A nanoporous, transition element technology, applied in the fields of nanoscience and nanoporous material preparation, to achieve the effect of strong element holding capacity and many systems

Inactive Publication Date: 2012-07-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the relatively simple problem of the nanoporous metal product prepared by the existing dealloying method, the present invention provides a Pd-based transition metal doped binary nanometer Porous material and preparation method thereof, capable of preparing doped Pd nanoporous material, and doping content can be adjusted

Method used

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  • Pd-based transition-metal-doped binary nano-porous material and preparation method thereof

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Effect test

Embodiment 1

[0032] A metallic glass prealloy for Ni doping (PdNi) 80 P 20 . The Ni content is 40 at%, the Pd content is 40 at%, and the P content is controlled around 20 at%. After washing and drying (NiPd) 80 P 20 As the working electrode, Pt is used as the counter electrode, and a saturated calomel electrode is used as the reference electrode. 2 SO 4 +0.1mol / L Ni 2+ + 0.2mol / L PO 4 -3 In a mixed corrosion solution, in 0.85-0.95V Dealloyed under conditions, when the current approached to zero, the dealloyed sample was taken out, and after cleaning, a PdNi binary nanoporous material was obtained, which had an internally connected bimodal pore structure. The size of the macropore in the nanopore is about 70-80nm, the size of the small hole is about 3-5nm, and the width of the connected metal ligament tissue is about 15-20nm. The Ni content is 1-3.5 at%.

[0033]

Embodiment 2

[0035] A metallic glass prealloy for Ni doping (PdNi) 80 P 20 . The Ni content can be 70 at%, the Pd content can be 10 at%, and the P content can be controlled around 20 at%. After washing and drying (NiPd) 80 P 20 As the working electrode, Pt was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode, and it was placed in NaCl corrosion solution. 0.46-0.60V dealloyed under conditions, and when the current approaches zero, the dealloyed sample is taken out, and after cleaning, a PdNi binary nanoporous material is obtained, which has an internally connected bimodal pore structure. The size of the macropore in the nanopore is about 70-100nm, the size of the small hole is about 3-5nm, and the width of the connected metal ligament tissue is about 15-20nm. The Ni content is 1-4 at%.

[0036]

Embodiment 3

[0038] A Metallic Glass Prealloy for Cu Doping (PdCu) 80 P 20 . The Ni content can be 50 at%, the Pd content can be 30 at%, and the P content can be controlled around 20 at%. After washing and drying (PdCu) 80 P 20 As the working electrode, Pt was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode. 2 SO 4 +0.1mol / L Cu 2+ In a mixed corrosion solution, in 0.80-0.85V dealloyed under the same conditions, and when the current approaches zero, the dealloyed sample is taken out, and after cleaning, a PdCu binary nanoporous material is obtained, which has an internally connected bimodal pore structure. The size of the macropore in the nanopore is about 70-100nm, the size of the small hole is about 3-5nm, and the width of the connected metal ligament tissue is about 15-20nm. The Cu content is 1-4 at%.

[0039]

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Abstract

The invention discloses a Pd-based transition-metal-doped binary nano-porous material and a preparation method thereof. The Pd-based transition-metal-doped binary nano-porous material is prepared by taking metal glass (PdM)80P20 prealloy as a raw material and dealloying in a solution by adopting a tri-electrode device, wherein M is Ni, Cu, Co or Fe; and the Pd-based transition-metal-doped binary nano-porous material has an internally-communicated doublet aperture structure, wherein the macropore size in nanopores is 70-100nm and the micropore size in the nanopores is 3-5nm, and the communicated metal ligament tissue width is 10-20nm. According to the Pd-based transition-metal-doped binary nano-porous material, transition metal doping of the Pd-based nano-porous material is easy to realizeby adopting a method of taking the metal glass as the prealloy, and the doped element content can be adjusted according to using requirements.

Description

technical field [0001] The invention relates to a method for preparing a nanoporous material for catalysis, chemical sensing and biological filtration, provides a Pd-based transition metal-doped binary nanoporous material, and belongs to the technical field of nanomaterial preparation. [0002] Background technique [0003] Nanoporous materials belong to the category of nanoscience and technology. Among them, nanoporous Pd has excellent properties such as large specific surface area, small mass, and good electrical and thermal conductivity, and has been widely used in the fields of catalysis, chemical sensing, and biological filters. [0004] Unlike natural materials such as bone, rock and soil, all nanoporous metal materials need to be synthesized artificially. The current synthesis methods mainly include foaming method, template method, self-assembly and dealloying method. Among them, the dealloying method is to use the difference in metal activity among the group me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08
Inventor 曾宇乔董小真蒋建清张旭海张军娜何心月谈荣升陈庐阳陈明伟
Owner SOUTHEAST UNIV
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