| abstract |
The invention discloses a preparation method of a carbon self-supporting metal phosphide catalyst. The transition metal element or transition metal compound is dispersed in distilled water to prepare a transition metal dispersion liquid; the transition metal dispersion liquid and phytic acid are mixed uniformly, and then Place in an oven to dry to a gel, and the obtained gel is roasted in a microwave oven to obtain a catalyst precursor ; the catalyst precursor is placed in a tube furnace, calcined and reduced in a H atmosphere, and then cooled to the passivation temperature, and the The carbon self-supported metal phosphide catalyst is prepared by adding an inert gas containing low concentration of oxygen for calcination and passivation. In the present invention, phytic acid can quickly absorb microwaves, and the transition metal phosphate precursor can be quickly obtained during microwave roasting, and at the same time, phytic acid absorbs microwaves and undergoes carbonization under rapid heating, so as to coat the transition metal phosphate precursor, and obtain In the carbon self-supported metal phosphide catalyst, carbon encapsulates the catalyst, forming a light carbon film that prevents it from being oxidized. |