Carbon-supported transition metal phosphide electrocatalyst for hydrogen generation and preparation method of carbon-supported transition metal phosphide electrocatalyst
A technology of transition metals and electrocatalysts, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of poor charge transport and stability, complicated preparation process, low industrial adaptability, etc., and achieve high conductivity , good electrical conductivity, simple and easy preparation method
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[0029] Example 1
[0030] This example illustrates the preparation of a carbon-supported iron phosphide (FeP / Fe@NC) catalyst and the control of the heat treatment temperature (T):
[0031] Using ferric ammonium citrate and dicyandiamide as raw materials, according to the mass ratio of dicyandiamide: ferric ammonium citrate = 8:1, disperse 8.0g dicyandiamide and 1.0g ferric ammonium citrate in deionized water. Stir in a water bath, evaporate to dryness, and grind to obtain a mixed powder. Next, put the mixed powder into a quartz tube, heat it to 600, 625, 650, 665, 680 and 700 ℃ respectively at a heating rate of 10 ℃ / min in an argon atmosphere, react for 2 hours, and naturally cool to room temperature to obtain a Series of iron-containing carbon precursors (Fe / Fe@NC-T-8) at different heat treatment temperatures;
[0032] The prepared precursor and sodium hypophosphite are mixed at the ratio of Fe:P=1:5 (atomic ratio), grind uniformly, and put into a tube furnace for phosphating trea...
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[0036] Example 2
[0037] This example illustrates the control example of the reactant ratio (X) prepared by the carbon supported iron phosphide (FeP / Fe@NC) catalyst:
[0038] Using ferric ammonium citrate and dicyandiamide as raw materials, the feed ratio of the two is adjusted to dicyandiamide: ferric ammonium citrate=4:1, 6:1, 8:1, 10:1 (mass ratio). The dosage of the fixed dicyandiamide is 8.0 g, and the corresponding mass of ferric ammonium citrate is added, and then the mixture is dispersed in deionized water, stirred in a water bath, evaporated to dryness, and ground to obtain a mixed powder. Next, put the mixed powder into a quartz tube, heat up to 650°C at a heating rate of 10°C / min in an argon atmosphere, and naturally cool to room temperature to obtain a series of iron-containing carbon precursors (Fe / Fe@NC-650-X);
[0039] The prepared precursor and sodium hypophosphite are mixed at the ratio of Fe:P=1:5 (atomic ratio), grind uniformly, and put into a tube furnace for ...
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[0041] Example 3
[0042] This example illustrates the preparation of carbon-supported cobalt phosphide (CoP / Co@NC) catalyst and the control of the heat treatment temperature (T):
[0043] Using cobalt acetate and dicyandiamide as raw materials, feed according to the mass ratio of dicyandiamide: cobalt acetate=8:1, disperse 8.0g dicyandiamide and 1.0g cobalt acetate in deionized water, stir and evaporate in a water bath, Grind to obtain mixed powder. Next, put the mixed powder into a quartz tube, heat up to 650, 680, and 700°C at a heating rate of 10°C / min in an argon atmosphere, and naturally cool to room temperature to obtain a cobalt-containing carbon precursor (Co / Co@ NC-T-8);
[0044] The prepared precursor and sodium hypophosphite were mixed at the ratio of Co:P=1:5 (atomic ratio), ground uniformly, and put into a tube furnace for phosphating treatment in an argon atmosphere at 5°C / min The heating rate is increased to 500°C and kept for 2h, and the temperature is naturally c...
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