Method for improving stability of transition metal sulfide catalyst
A technology of transition metals and sulfides, applied in electrolysis process, electrodes, electrolysis components, etc., can solve the problems of limited development, catalytic performance attenuation, deactivation, etc., and achieve the goal of enhancing anti-oxidation ability, broad application prospects, and prolonging storage time Effect
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Embodiment 1
[0025] At room temperature, accurately weigh 10mg of nickel oxide and 1.02g of thiourea with an electronic balance, and place them in two quartz boats respectively. The nickel quartz boat was placed in the center of the tube furnace, and high-purity nitrogen gas was passed through at a flow rate of 20 mL / min for half an hour until the nitrogen in the tube was saturated, and then heated to 500 °C at a heating rate of 5 °C per minute and kept for 1 hour. Nitrogen-doped nickel sulfide is obtained after the reaction is completed.
[0026] For the non-nitrogen-doped nickel sulfide comparison sample, its preparation method is to replace the thiourea in the above method with an equimolar amount of sublimed sulfur, and the other steps are consistent with the above method.
[0027] After the obtained nickel sulfide and nitrogen-doped nickel sulfide are stored in the air under the same conditions for one week, the X-ray diffraction patterns of the product before and after oxidation are ...
Embodiment 2
[0031] At room temperature, accurately weigh 10 mg tricobalt tetroxide and 948 mg thiourea with an electronic balance, and place them in two quartz boats respectively. The quartz boat was placed in the center of the tube furnace, and high-purity nitrogen gas was flowed at a flow rate of 20 mL / min for half an hour until the nitrogen in the tube was saturated, then heated to 500 °C at a heating rate of 5 °C per minute and kept for 1 hour. Nitrogen-doped cobalt sulfide was obtained after the reaction was completed.
[0032] For the non-nitrogen-doped cobalt sulfide reference sample, its preparation method is to replace the thiourea in the above method with an equimolar amount of sublimed sulfur, and the other steps are consistent with the above method.
[0033] The obtained cobalt sulfide and nitrogen-doped cobalt sulfide are stored in the air under the same conditions for one week, and the X-ray diffraction patterns are as follows: Figure 4 shown. In the cobalt sulfide oxidiz...
Embodiment 3
[0036] At room temperature, 10 mg ferric oxide and 986 mg thiourea were accurately weighed with an electronic balance, and placed in two quartz boats respectively. The quartz boat filled with ferroferric oxide was placed in the center of the tube furnace, and high-purity nitrogen gas was passed through at a flow rate of 20 mL / min for half an hour until the nitrogen in the tube was saturated, and then heated to 500 °C at a heating rate of 5 °C per minute And keep it warm for 1 hour, and obtain nitrogen-doped iron sulfide after the reaction is completed.
[0037] For the non-nitrogen-doped iron sulfide reference sample, its preparation method is to replace the thiourea in the above method with an equimolar amount of sublimed sulfur, and the other steps are consistent with the above method.
[0038] After storing the obtained iron sulfide and nitrogen-doped iron sulfide under the same conditions in air for one week, the X-ray diffraction patterns are as follows: Figure 6 shown....
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