Method for preparing nickel nanoparticle catalyst by liquid-phase chemical reduction method
A technology of nickel nanoparticles and reduction method, which is applied in the field of preparation of nickel nanoparticle catalysts by liquid phase chemical reduction method, can solve the problems of agglomeration, excessive nickel particle size, uneven loading, etc., and achieve fine particle size and uniform distribution Effect
Inactive Publication Date: 2012-11-21
启东市三江建筑机械有限公司
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Problems solved by technology
However, there are many problems in the process of preparing nickel-supported multi-walled carbon nanotube catalysts by liquid phase chemical reduction, such as: the surface of carbon nanotubes is inert, and the acidification conditions will affect the introduction of surface functional groups. Uniform loading of nickel particles; it is difficult to control the reaction rate and the environment of nickel particle growth, the particle size of nickel particles in the catalyst is too large and the agglomeration phenomenon is serious; the loading of nickel particles on the surface of carbon nanotubes is uneven, resulting in small specific surface area, which inhibits Its electrocatalyst performance
Therefore, solving the problem that acidification conditions affect the introduction of surface functional groups and the uneven loading of nickel particles inhibits its electrocatalyst performance is the primary problem in the preparation of nickel-supported multi-walled carbon nanotube catalysts by liquid-phase chemical reduction.
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[0023] A method for preparing a nickel nanoparticle catalyst by a liquid phase chemical reduction method, the specific steps are as follows:
[0024] 1. Pretreatment of multi-walled carbon nanotubes
[0025] Take 2 grams of multi-walled carbon nanotubes and disperse them in 100ml of a mixed acid solution of concentrated nitric acid and concentrated sulfuric acid, condense and reflux at 80°C for 8 hours, then wash the acidified multi-walled carbon nanotubes to pH=7.0, Drying is carried out, and the mixed acid is composed of concentrated nitric acid and concentrated sulfuric acid with a volume ratio of 1:3;
[0026] Disperse the above-mentioned acidified multi-walled carbon nanotubes in 50 ml mixed solution for sensitization for 30 minutes, filter, wash thoroughly, and dry under vacuum conditions to obtain sensitized multi-walled carbon nanotubes, wherein the mixed solution 7'10 -3 Moles of SnCl 2 , 3'10 -3 moles of HCl and 0.03 g of polydecyl methacrylate;
[0027] Ultra...
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The invention provides a method for preparing a nickel nanoparticle catalyst by a liquid-phase chemical reduction method. The method comprises the step of supporting nickel nanoparticles on a multi-walled carbon nanotube carrier which is pretreated by acidification, sensitization and activation so as to prepare a nickel nanoparticle supported multi-walled carbon nanotube catalyst. The obtained catalyst has excellent catalytic activity on ethanol and is especially suitable for ethanol fuel cells.
Description
technical field [0001] The invention relates to a method for preparing a nickel nanoparticle catalyst by a liquid-phase chemical reduction method, in particular to a method for preparing a nickel nanoparticle-loaded multi-wall carbon nanotube catalyst applied to an ethanol fuel cell. Background technique [0002] Ethanol has a wide source, low toxicity, high hydrogen content, and is renewable. The permeability to the proton exchange membrane is much lower than that of methanol. It is an ideal fuel for proton exchange membrane fuel cells. However, it is difficult to break the C-C bond of ethanol and oxidize it into carbon dioxide, which greatly affects the application of ethanol as a battery fuel. Therefore, how to improve the electrocatalytic activity of electro-oxidation catalysts is the focus of current research. [0003] Among the electrode catalysts, noble metal electrocatalysts such as nano-Pt and Pd with high catalytic activity are commonly used to enable fuel cells to...
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IPC IPC(8): B01J23/755
CPCY02E60/50
Inventor 胡海波梁轶聪
Owner 启东市三江建筑机械有限公司