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Flower structure nano cerium oxide base composite material and its preparing method and use

A technology of nano-cerium oxide and flower-like structure, which is applied in nanostructure manufacturing, chemical instruments and methods, nanotechnology, etc., can solve the problems of low battery power density, lower battery efficiency and stability, etc., achieve high yield, avoid Good effect of limitation and dispersion

Active Publication Date: 2008-12-24
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects that the anode material of the existing solid oxide fuel cell needs to be used at a relatively high temperature, which reduces the efficiency and stability of the battery, and the power density of the battery is low, thereby providing a flower-like structure Nano-cerium oxide-based composite materials, when used as anode materials for solid oxide fuel cells, can be used at lower temperatures, and the power density of the cells is higher

Method used

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  • Flower structure nano cerium oxide base composite material and its preparing method and use
  • Flower structure nano cerium oxide base composite material and its preparing method and use
  • Flower structure nano cerium oxide base composite material and its preparing method and use

Examples

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Effect test

Embodiment 1

[0036] Example 1, preparation of cerium oxide-copper oxide composite material with flower-like structure

[0037] Weigh 0.2 mol of glucose, add it into a container containing 80 ml of deionized water under strong stirring, and prepare it into a 2.5M glucose aqueous solution, then add 0.8 mol of acrylamide, and after it is completely dissolved, add 0.5 mol of hydrated Cerium nitrate, stir to make the cerium nitrate completely dissolved, then add dropwise 0.5M NaOH solution to adjust the pH value of the mixture to 11, with the addition of lye, the mixture changes from a colorless solution to a light yellow-green gel , the pH value of the gel was about 11; after fully stirring for 1 hour, the obtained gel was transferred to 100 ml of Teflon-lined autoclave, and the filling degree was 80v%, and then The autoclave is sealed. And keep it in a constant temperature oven at 180°C for 72 hours. After the hydrothermal reaction, cool naturally to room temperature, centrifuge the obtaine...

Embodiment 2

[0043] Example 2, preparation of cerium oxide-nickel oxide composite material with flower-like structure

[0044] Weigh 0.0007 mol of glucose, add it into a container containing 70 ml of deionized water under strong stirring, and make it into a 0.01M glucose aqueous solution, then add 0.000175 mol of acrylamide, and after it is completely dissolved, add 0.00007 mol of hydrated Cerium nitrate and 0.000021mol hydrated nickel nitrate, after stirring to completely dissolve the cerium nitrate and nickel acetate, add 25wt% NH 3 .H 2 O solution adjusts the pH value of the mixed solution to 10, and along with the dripping of ammoniacal liquor, the mixed solution turns into a gel, and the pH of the gel is about 10; after fully stirring for 5 hours, the mixture will be obtained The gel was transferred to a 100 ml polytetrafluoro-lined autoclave with a filling degree of 70v%, and then the autoclave was sealed. And keep it in a constant temperature oven at 180°C for 72 hours. After the...

Embodiment 3

[0047] Example 3, preparation of cerium oxide-manganese oxide-copper oxide composite material with flower-like structure

[0048] Weigh 0.45 mol of glucose, add it into a container containing 90 ml of deionized water under strong stirring, and make it into a 5M glucose aqueous solution, then add 1.8 mol of acrylamide, and after it is completely dissolved, add 2.25 mol of hydrated acetic acid Cerium and 0.5625mol hydrated manganese nitrate, stir to completely dissolve cerium acetate and manganese nitrate, then add dropwise 0.5M NaOH solution to adjust the pH value of the mixed solution to 11, with the addition of lye, the mixed solution becomes shallow Gel, the pH value of this gel is about 11; After fully stirring for 1 hour, the gel obtained is transferred to a 100 ml autoclave lined with polytetrafluoroethylene, and the filling degree is 90v %, and then seal the autoclave. And keep it in a constant temperature oven at 220°C for 10 hours. After the hydrothermal reaction, co...

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Abstract

The invention relates to a nano-cerium oxide-based composite material with a flower-like structure, which is a powder material with an average particle diameter of 100nm-100μm, and flakes with a thickness of 2-500nm grow on each particle, showing a flower-like structure. The cerium oxide-based composite material is cerium oxide and selected from lanthanum oxide, copper oxide, zirconia, titanium oxide, aluminum oxide, magnesium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, vanadium oxide, tungsten oxide, Binary or ternary composite oxide formed by one or two oxides of molybdenum oxide, silicon oxide, zinc oxide, gadolinium oxide, yttrium oxide, spectrum oxide, samarium oxide, scandium oxide, europium oxide, erbium oxide, and ytterbium oxide The molar ratio of oxides other than cerium oxide to cerium oxide is 0.001-0.5:1. The composite material has a very large specific surface area and can be used as an anode material of a solid oxide fuel cell or a support body of a noble metal catalyst.

Description

technical field [0001] The invention relates to a nano-cerium oxide-based composite material with a flower-like structure, a preparation method thereof, and an application thereof in a solid oxide fuel cell. Background technique [0002] With the requirement of improving the environment and the increasingly severe energy shortage situation faced by human beings, it is particularly urgent to research and develop clean and environment-friendly power generation devices. Fuel cell is such a power generation device. It can directly convert the chemical energy of fuel into electrical energy without being limited by the efficiency of Carnot heat engine. It has high energy conversion efficiency, convenient operation, and low pollution to the environment. countries attach great importance to. Especially the solid oxide fuel cell (SOFC) in the fuel cell has more advantages, such as high power generation efficiency, wide fuel sources, high value of waste heat utilization, no need to u...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82B1/00
Inventor 孙春文李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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