Preparation method of catalytic electrode for ammonia production through electrochemical reduction of nitrate or nitrite
A nitrite, catalytic electrode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problem of scarcity of efficient self-supporting catalytic electrode preparation methods, and achieve the effects of excellent ammonia production rate and simple preparation process.
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Embodiment 1
[0020] Soak nickel foam with a thickness of 0.1mm, a width of 2cm, and a length of 4cm in 6mol / L hydrochloric acid, ultrasonically treat it for 10 minutes, wash it with pure water and absolute ethanol three times after taking it out, and then place it in an oven at 70°C Dry to obtain pretreated nickel foam. Put the pretreated nickel foam into 75mmol / L sodium borohydride solution, soak for 12 hours, take it out, wash it with pure water and absolute ethanol three times respectively, and then dry it in an oven at 70°C to obtain a catalytic electrode.
[0021] figure 1 The SEM image of the prepared catalytic electrode shows that the electrode has a foam network structure, and the surface particles may be the catalytic active sites.
[0022] The catalytic electrode was cut according to the size of 0.3cm in length and width, and as the working electrode, in the standard three-electrode (counter electrode: platinum mesh; reference electrode: saturated calomel electrode) system, with...
Embodiment 2
[0024] Soak nickel foam with a thickness of 0.1mm, a width of 2cm, and a length of 4cm in 6mol / L hydrochloric acid, ultrasonically treat it for 15 minutes, wash it with pure water and absolute ethanol three times after taking it out, and then place it in an oven at 70°C Dry to obtain pretreated nickel foam. Put the pretreated nickel foam into 100mmol / L sodium borohydride solution, soak for 12 hours, take it out, wash it with pure water and absolute ethanol three times respectively, and then dry it in an oven at 70°C to obtain a catalytic electrode.
[0025] The catalytic electrode was cut according to the size of 0.3cm in length and width, and as the working electrode, in the standard three-electrode (counter electrode: platinum mesh; reference electrode: saturated calomel electrode) system, with 0.1mol / L The mixed solution of sodium and 0.5mol / L sodium nitrate is the electrolyte, and it is tested at 1.4V (vs. SCE) for 1800s at normal temperature and pressure. The ammonia con...
Embodiment 3
[0027] Soak nickel foam with a thickness of 0.1mm, a width of 2cm, and a length of 4cm in 6mol / L hydrochloric acid, ultrasonically treat it for 18 minutes, wash it with pure water and absolute ethanol three times after taking it out, and then place it in an oven at 70°C Dry to obtain pretreated nickel foam. Put the pretreated nickel foam into 125mmol / L sodium borohydride solution, soak for 11.5 hours, take it out, wash it with pure water and absolute ethanol three times respectively, and then dry it in an oven at 70°C to obtain a catalytic electrode.
[0028] The catalytic electrode was cut according to the size of 0.3cm in length and width, and as the working electrode, in the standard three-electrode (counter electrode: platinum mesh; reference electrode: saturated calomel electrode) system, with 0.1mol / L The mixed solution of sodium and 0.5mol / L sodium nitrate is the electrolyte, and it is tested at 1.4V (vs. SCE) for 1800s at normal temperature and pressure. The ammonia c...
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