A vacancy-rich rhenium diselenide-based multilevel hydrophobic membrane and its preparation method
A rhenium diselenide and hydrophobic membrane technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve difficult problems such as surface modification of two-dimensional transition metal sulfides, achieve inhibition Catalytic hydrogen evolution reaction process, simple synthesis method, and the effect of improving efficiency
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Embodiment 1
[0043] Synthesis of Vacancies-Rich Rhenium Diselenide-Based Hierarchical Hydrophobic Membranes:
[0044] (1) Weigh 5 mg of bacterial cellulose-based carbon nanofibers, put them into 35 mL of aqueous solution of 134.1 mg of ammonium perrhenate and 73.9 mg of hydroxylamine hydrochloride dissolved therein, and sonicate for 30 min;
[0045] (2) Take by weighing 1.58g selenium powder, stir and dissolve in the hydrazine hydrate of 100mL, obtain the selenium powder / hydrazine hydrate solution that concentration is 15.8mg / mL;
[0046] (3) Take 5mL of the selenium powder / hydrazine hydrate solution in step (2) and add it dropwise to the solution obtained in step (1), transfer it to a hydrothermal kettle after stirring, and react at 200°C for 24h to obtain rhenium diselenide / Carbon nanofiber composite materials;
[0047] (4) heat-treat the low-crystalline rhenium diselenide / carbon nanofiber composite material prepared in step (3) at 700°C for 3 hours, and the heat treatment atmosphere us...
Embodiment 2
[0063] Change the consumption of bacterial cellulose-based carbon nanofibers to 10mg in step (1) of Example 1, and the rest are the same as in Example 1. The multi-level hydrophobic membrane finally obtained is denoted as CBC / V r -ReSe 2 @CBC / CBC-1.
[0064] Electrocatalytic nitrogen reduction ammonia production test: the test method is the same as in Example 1, Figure 5 The performance diagram of the electrocatalytic reduction of nitrogen into ammonia by the multi-stage hydrophobic membrane prepared for this example, as can be seen from the figure, the test result is: the maximum ammonia production rate reaches 16.1 μg h -1 cm -2 , the highest Faradaic efficiency is 18.7%.
Embodiment 3
[0066] Change the heat treatment atmosphere of step (4) in Example 1 to an environment rich in selenium vapor, all the other are the same as Example 1, and the multi-level hydrophobic film finally obtained is denoted as CBC / V r -ReSe 2 @CBC / CBC-2.
[0067] Electrocatalytic nitrogen reduction ammonia production test: the test method is the same as in Example 1, Figure 5 The performance diagram of the electrocatalytic reduction of nitrogen into ammonia by the multi-stage hydrophobic membrane prepared for this example, as can be seen from the figure, the test result is: the maximum ammonia production rate reaches 8.8 μg h -1 cm -2 , the highest Faradaic efficiency is 16.4%.
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