Method of preparing nano catalyst for proton exchange film fuel cell

Abstract

The method for preparing Nano electrocatalyst includes steps: using chloro platinic acid, sodium chloroplatinate, water solution of potassium chloroplatinate, or chloro platinic acid, sodium chloroplatinate, water solution of potassium chloroplatinate and ruthenium chloride as raw materials; adding active carbon into the said material to adsorb noble metals; adding ethanol, propanol or isopropyl alcohol to carry out decentralization effect; pH value of mixed liquor is adjusted through alkaline solution so as to obtain liquor of raw materials. Deoxidation liquor is prepared by using deionized water to blend reducing agent: sodium borohydride and potassium borohydride. Under carrying current of nitrogen gas or argon gas, liquor of raw materials through spraying pen is jetted to the deoxidation liquor to deoxidize noble metal ion, which then passes through filtering, washing and drying procedures.

Description

technical field [0001] The invention relates to a preparation method of a proton exchange membrane fuel cell nano catalyst. Background technique [0002] Proton exchange membrane fuel cell is a new type of device that directly converts chemical energy into electrical energy. Since there is no internal energy consumption of rotating parts and no combustion, the energy conversion efficiency is not limited by the Carnot cycle; clean energy, such as hydrogen, methanol, etc., has no sulfur oxide and nitrogen oxide emissions, and is harmless to the environment; suitable for The application field of mobile power is the preferred power source for the development of electric vehicles. At present, due to the continuous improvement of technology, its industrialization and practicality are becoming increasingly clear. One of its key materials is an electrocatalyst, whose activity directly affects battery performance. The catalyst produced by ELECTROCHEM is a commercial catalyst with ...

AI Technical Summary

Problems solved by technology

However, due to the strict control of conditions during preparation, it is generally difficult to prepare catalysts with uniform microscopic state by conventional methods.

Usually due to the existence of adsorption equilibrium, the noble metal in the solution is first reduced, the adsorption equilibrium moves to the liquid phase, and the adsorbed noble metal is desorbed. In fact, most of the reduction of the noble metal is carried out in the liquid phase, so the catalyst obtained by reduction will inevitably produce Agglomeration of metal particles, loss of uniformity and poor loading of activated carbon