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Dendritic nanowire catalyst carrier with metal oxide/carbon core-sheath structure and preparation method of supported catalyst

A catalyst carrier, metal nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of poor stability, high cost, poor catalyst performance, etc., to improve stability, The effect of solving poor conductivity and improving catalytic activity

Inactive Publication Date: 2015-11-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of poor catalyst performance, high cost and poor stability in existing fuel cell catalysts, and provides a dendritic nanowire catalyst with a metal oxide / carbon core-sheath structure and a preparation method thereof. Proposed new ideas and approaches for the development of fuel cell catalysts

Method used

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  • Dendritic nanowire catalyst carrier with metal oxide/carbon core-sheath structure and preparation method of supported catalyst
  • Dendritic nanowire catalyst carrier with metal oxide/carbon core-sheath structure and preparation method of supported catalyst
  • Dendritic nanowire catalyst carrier with metal oxide/carbon core-sheath structure and preparation method of supported catalyst

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specific Embodiment approach 1

[0028] Specific embodiment 1: The metal oxide / carbon dendritic nanowire with a core-sheath structure provided in this embodiment is a dendritic nanowire catalyst carrier with a metal oxide / carbon core-sheath structure with a uniform diameter, and the nanowire The diameter is 3-200nm, and the thickness of the carbon sheath is 0.5-20nm.

[0029] The dendritic nanowire catalyst carrier of the metal oxide / carbon core sheath structure described in this embodiment has a unique nanowire structure, and this special shape has a relatively high active area, and the diameter of the nanowire and the thickness of the carbon sheath can be effectively adjusted. regulation, its TEM image is shown in Figure 2-3 shown.

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the metal oxide can be an oxide or a metal-doped oxide, and the doped metal is Pt, Pd, Ru, Os , Rh, Ir, Ag, Au, Re, Cr, Fe, Mn, Co, Ni, Cu, Zn, In, Sn and Sb or one or more of them, the doping ratio is 0.1~40wt.%; metal Oxide is Al 2 o 3 , Ga 2 o 3 , SiO 2 、GeO 2 、TiO 2 , ZrO 2 , V 2 o 5 、Cr 2 o 3 , MnO 2 , Fe 2 o 3 , Fe 3 o 4 、Co 2 o 3 , NiO, CuO, ZnO, Nb 2 o 5 、MoO 3 , RuO 2 、In 2 o 3 , SnO 2 , Sb 2 o 3 , Sb 2 o 5 , Tl 2 o 3 , PbO, Bi 2 o 3 , La 2 o 3 、 Ta 2 o 5 、WO 2 、WO 3 、 Bi 2 o 3 and CeO 2 One of.

specific Embodiment approach 3

[0031] Specific embodiment three: This embodiment provides a method for preparing a dendritic nanowire catalyst carrier with a metal oxide / carbon core sheath structure, which is specifically completed in the following steps:

[0032]1. Prepare a uniform and transparent reactant solution: stir the oxide precursor (or the mixed solution of the oxide precursor and the metal dopant precursor) and the acid solution at a stirring speed of 100~1000rpm for 10~120min and disperse in the multi-component In the alcohol, the molar ratio of the metal dopant precursor and the oxide precursor in the mixed solution is controlled to be 0.001-0.3, the concentration of the metal precursor is 10-100mmoL / L, and the acid concentration is 0.01-1moL / L.

[0033] 2. Solvothermal reaction: put the mixed solution in a high-pressure reactor for reaction, control the reaction temperature at 120~300°C, and the reaction time is 0.5~15h. After the reaction is completed, it is naturally cooled to room temperatu...

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Abstract

The invention discloses a dendritic nanowire catalyst carrier with metal oxide / carbon core-sheath structure and a preparation method of a supported catalyst. The catalyst carrier is dendritic nanowires with the core-sheath structure; according to the core-sheath structure, the metal oxide is adopted as an inner core; and carbon is adopted as an outer sheath. The preparation method comprises the following steps: (1), preparing a uniform and transparent reactant solution; (2), carrying out solvothermal reaction; (3), centrifugally washing and drying the obtained product; and (4), coating the obtained product with a carbon sheath. The dendritic nanowire catalyst carrier with the metal oxide / carbon the core-sheath structure and the preparation method of supported metal nanoparticles disclosed by the invention are simple to operate and easy to control; a template is not needed in the preparation process; ordinary precursors such as chlorate and nitrate can be utilized; a metal organic compound required for preparation of the catalyst with a special structure is avoided; and the cost is further reduced.

Description

technical field [0001] The invention relates to a dendritic nanowire catalyst carrier with a metal oxide / carbon core-sheath structure, a preparation method and a method for preparing a metal nano particle catalyst loaded on the carrier. Background technique [0002] Polymer electrolyte membrane fuel cell is a power generation device that converts chemical energy into electrical energy. It has outstanding features such as high energy conversion rate, environmental friendliness, fast start-up speed at room temperature, high specific power and specific energy, and is recognized as the mainstream in the future. One of the power supply devices, but the high cost caused by the extensive use of noble metal catalysts is the core problem that limits the large-scale application of polymer electrolyte membrane fuel cells. Therefore, it is necessary to further improve the activity and stability of the catalyst to reduce its cost. [0003] Catalyst support is an important factor affecti...

Claims

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Application Information

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IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/90Y02E60/50
Inventor 杜春雨谭强孙雍荣尹鸽平高云智左朋建程新群马玉林
Owner HARBIN INST OF TECH
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