Preparation method of nickel nanoparticles-loaded multi-wall carbon nanotube catalytic agent

Abstract

The invention discloses a preparation method of a nickel nanoparticles-loaded multi-wall carbon nanotubes catalytic agent, belonging to the technical field of energy material. The preparation method comprises the steps of acidifying multi-wall carbon nanotubes (MWCNTs) in mixed acid, leading in functional groups, respectively sensitizing and activating the MWCNTs in hydrochloric acid water solution of SnCl2 and PdCl2 to lead in a Pd active site, ultrasonically dispersing nickel salt NiCl2.6H2O and the pretreated MWCNTs in the water solution according to a certain proportion, adding a certain quantity of cetyl trimethyl ammonium bromide (CTAB) to be taken as a complexing agent, complexing Ni2+and an added reducing agent to control the velocity and the steps of the reaction, adjusting a PH value to be a required value, and adding the reducing agent within the time required by the reaction at a certain temperature. The method obtains the nickel nanoparticles which are even in distribution and fine in grain diameters on the surfaces of multi-wall carbon nanotubes.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a liquid-phase chemical reduction preparation method of a nickel nanoparticle-loaded multi-walled carbon nanotube catalyst applied to an ethanol fuel cell. Background technique [0002] In 1839, the British William Grove first announced the working principle of the fuel cell, creating a new energy conversion technology since then. Fuel cells are the fourth type of power generation technology after hydropower, thermal power and nuclear energy utilization. It can directly convert the chemical reaction free energy change into electrical energy through the electrode-electrolyte system. Compared with traditional conversion methods, fuel cells do not require thermal energy conversion and mechanical energy conversion processes, avoid energy loss and limitations of the Carnot cycle, and significantly improve energy conversion efficiency. Fuel cells not only have hi...

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Problems solved by technology

However, at present, the process of preparing nickel-supported multi-walled carbon nanotube catalysts by liquid-phase chemical reduction method has the following problems: 1) The surface of carbon nanotubes is inert, and acidification conditions will affect the degree of introduction of surface functional groups. Also be difficult to make the uniform loading of nickel particle; 2) direct liquid phase chemical reduction method is difficult to control the rate of reaction and the environment that nickel particle grows, the nickel particle particle size in the prepared catalyst is too large and agglomeration phenomenon is serious; 3) nickel The uneven loading of particles on the surface of carbon nanotubes results in a small specific surface area and inhibits their electrocatalytic performance

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