Transition metal selenide electro-catalytic material as well as preparation method and application thereof
A transition metal, selenide electro-technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high price, unsuitable for large-scale promotion, etc., and achieve the effect of low cost, good application prospects, and rich active sites.
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[0027] The embodiment of the present invention provides a preparation method of a transition metal selenide electrocatalytic material, comprising the following steps:
[0028] S1. Mix the transition metal cation solution and the persulfate ion solution evenly to obtain a mixed solution, take the conductive substrate and place it in the mixed solution, and add ammonia water dropwise under constant temperature stirring, keeping the temperature within the range of 8°C to 26°C, After standing still, take out the conductive substrate, wash it with deionized water for 1-5 times, and perform the first calcination after drying to obtain the precursor;
[0029] S2. Put the precursor and selenium powder in a tube furnace, and perform a second calcination in an inert gas atmosphere or a reducing gas atmosphere to obtain a transition metal selenide electrocatalytic material.
[0030] Specifically, in step S1, the transition metal cation solution includes transition metal-containing chlori...
Embodiment 1
[0044] This embodiment provides a preparation method of a transition metal selenide electrocatalytic material, comprising the following steps:
[0045] 1) Weigh 5g of nickel sulfate and potassium persulfate at a mass ratio of 7:1, dissolve it in 28mL of deionized water, and stir for 10min at 15°C; immerse the carbon fiber paper in the solution for 3min, add 4mL of ammonia water dropwise, and the stirred solution turns dark blue After coloring, let stand for 20 minutes, take out the carbon fiber paper, wash it three times with deionized water, and then dry it; calcinate the dried carbon fiber paper in air at 300°C for 60 minutes to obtain a precursor.
[0046]2) Weigh 0.5g of selenium powder, place the selenium powder and the precursor on two small porcelain boats respectively, and place them in two different temperature zones of the same tube furnace. 8% nitrogen-hydrogen mixed gas is added for heating and heating treatment to obtain transition metal selenide electrocatalytic ...
Embodiment 2
[0048] This embodiment provides a preparation method of a transition metal selenide electrocatalytic material, comprising the following steps:
[0049] 1) Weigh 5g of nickel sulfate and potassium persulfate at a mass ratio of 7:1, dissolve it in 28mL of deionized water, and stir for 10min at 10°C; immerse the carbon fiber paper in the solution for 3min, add 4mL of ammonia water dropwise, and the stirred solution turns dark blue After coloring, let it stand for 20 minutes, take out the carbon fiber paper, wash it three times with deionized water, and then dry it; calcinate the dried carbon fiber paper in air at 300°C for 90 minutes to obtain a precursor.
[0050] 2) Weigh 0.5g of selenium powder, place the selenium powder and the precursor on two small porcelain boats respectively, and place them in two different temperature zones of the same tube furnace. 8% nitrogen-hydrogen mixed gas is added for heating and heating treatment to obtain transition metal selenide electrocataly...
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