High efficiency water splitting oxygen electrode suitable for natural water and preparation method
A natural water body, oxygen electrode technology, applied in the direction of electrodes, electrode shapes/types, electrolytic components, etc., can solve the problems of high-efficiency and high-stable water splitting oxygen electrodes, etc., to achieve easy large-scale synthesis, high current density, and avoid side effects The effect of the reaction
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Embodiment 1
[0022] Cobalt-iron hydrotalcite-conductive carbon black composite / titanium mesh water-splitting oxygen electrode for catalytic oxygen evolution in natural Bohai Sea water
[0023] (1) Preparation of cobalt-iron hydrotalcite active material: weigh 11.636g Co(NO 3 ) 2 ·6H 2 O, pipette 8.076gFe (NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water to make a mixed salt solution; then weighed 3.84gNaOH and 4.24gNaOH 2 CO 3 Dissolve in 100mL deionized water to make a mixed alkali solution; pour the above two solutions into a fully back-mixed rotary liquid film reactor and react for 2min at the same time, and the resulting slurry is crystallized in a water bath at 60°C for 12h to obtain a cobalt-iron hydrotalcite slurry, centrifuged Wash to pH = 7.5, dry at 80°C for 12 hours, and grind to obtain hydrotalcite nanoparticle powder, its XRD spectrum is as follows figure 1 As shown, the appearance of characteristic diffraction peaks such as (003), (006), and (012) indicates the g...
Embodiment 2
[0029] Cobalt-iron hydrotalcite-conductive carbon black composite / titanium mesh water-splitting oxygen electrode for catalytic oxygen evolution in artificial seawater
[0030] (1) Preparation of cobalt-iron hydrotalcite active material: weigh 17.454g Co(NO 3 ) 2 ·6H 2 O, pipette 8.076gFe (NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water to make a mixed salt solution; then weighed 4.62gNaOH and 4.83gNaOH 2 CO 3 Dissolve in 100mL deionized water to make a mixed alkali solution; pour the above two solutions into a fully back-mixed rotary liquid film reactor and react for 2 minutes, and the resulting slurry is crystallized in a water bath at 50°C for 10 hours to obtain a cobalt-iron hydrotalcite slurry, centrifuged Wash to pH = 8, dry at 70° C. for 16 hours, and grind to obtain hydrotalcite nanoparticle powder.
[0031] (2) With the cobalt-iron hydrotalcite obtained in step (1) as the active material, after mixing CoFeLDH and conductive agent carbon black (VulcanXC-72...
Embodiment 3
[0035] Cobalt-iron hydrotalcite-conductive carbon black composite / titanium mesh water-splitting oxygen electrode for catalytic oxygen evolution in neutral sodium chloride solution
[0036] (1) Preparation of cobalt-iron hydrotalcite active material: weigh 14.16g Co(NO 3 ) 2 ·6H 2 O, pipette 9.11gFe (NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water to make a mixed salt solution; then weighed 3.96gNaOH and 4.24gNaOH 2 CO 3 Dissolve in 100mL deionized water to make a mixed alkali solution; pour the above two solutions into a fully back-mixed rotating liquid film reactor at the same time and react for 1.5min, and the resulting slurry is crystallized in a water bath at 55°C for 5h to obtain a cobalt iron hydrotalcite slurry Centrifugal washing to pH = 7.5, drying at 60° C. for 24 hours, and grinding to obtain hydrotalcite nanoparticle powder.
[0037] (2) With the cobalt-iron hydrotalcite obtained in step (1) as the active material, after mixing CoFeLDH and conductive ...
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