Preparation method of high-dispersion platinum powder

The invention discloses a preparation method of high-dispersion platinum powder, which comprises the following steps: weighing a dispersant, dissolving the dispersant in deionized water in a reaction kettle to serve as a reaction base solution, preparing a platinum salt solution as an oxidant, preparing a reducing agent solution, preparing a sodium hydroxide solution with corresponding mass fraction, and dropwise adding the three reagents into the reaction kettle according to a set flow rate to carry out a preparation reaction; after the reaction is finished, coating, centrifugally separating a solid phase from a liquid phase, and drying to obtain a final platinum powder product; by changing the concentration of sodium hydroxide and adjusting the dropwise adding flow rate, the platinum powder which does not need to be added with seed crystals, is adjustable in particle size and high in dispersity can be prepared. 本发明公开了一种高分散铂粉的制备方法，称取分散剂溶解于反应釜内的去离子水中作为反应底液，配置铂盐溶液作为氧化剂，配置还原剂溶液，配置相应质量分数氢氧化钠溶液，随后将三种试剂按设定流速滴加至反应釜