MoO2-coated C electrocatalyst as well as preparation method and application thereof
An electrocatalyst, 6mo7o24·4h2o technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problem of low efficiency of ammonia synthesis, and achieve the effect of enhancing electrical conductivity, high Faradaic efficiency, and enhancing adsorption capacity
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Embodiment 1
[0025] Example 1: MoO 2 Preparation of @C electrocatalyst
[0026] Combine 0.5g PVP and 2g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 60 mL of deionized water, and the mixed solution was continuously stirred and evaporated to dryness at 90 °C to obtain Mo 6+ - PVP powder. The precursor powder was placed in a tube furnace, under an Ar atmosphere, the calcination temperature was 650°C, the heating rate was 5°C / min, and the temperature was kept for 5h to obtain MoO 2 @C electrocatalyst, denoted as MoO 2 @C-1.
Embodiment 2
[0027] Example 2. MoO 2 Preparation of @C electrocatalyst
[0028] Combine 1g PVP and 2g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 60mL deionized water to obtain a mixed solution, and the mixed solution was continuously stirred and evaporated to dryness at 90°C to obtain Mo 6+ - PVP powder. Will Mo 6+ - PVP powder is placed in a tube furnace, under an Ar atmosphere, the calcination temperature is 650°C, the heating rate is 5°C / min, and the temperature is kept for 5h to obtain MoO 2 @C electrocatalyst, denoted as MoO 2 @C-2.
[0029] figure 1 for MoO 2 SEM image of @C-2. It can be seen from the figure that the carbon film is coated with MoO 2 nanoparticles, proving that the catalyst was synthesized successfully.
[0030] figure 2 for MoO 2 Energy dispersive x-ray spectroscopy (EDX) of @C-2. It can be seen from the figure that through the location of each element, it can be seen that all three elements exist, which proves that the synthesis is successful.
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Embodiment 3
[0033] Example 3: MoO 2 Preparation of @C electrocatalyst
[0034] Combine 2g PVP and 2g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 60 mL of deionized water, and the mixed solution was continuously stirred and evaporated to dryness at 90 °C to obtain Mo 6+ - PVP powder. The precursor powder was placed in a tube furnace, under an Ar atmosphere, the calcination temperature was 650°C, the heating rate was 5°C / min, and the temperature was kept for 5h to obtain MoO 2 @C electrocatalyst, denoted as MoO 2 @C-3.
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