Method for preparing flowerlike nanometer cobalt by using anodised aluminum template, and product of same

[0031] 1×2cm 2 Half of the conductive glass FTO is spin-coated with a layer of 6% polyvinyl alcohol solution (spin-coating speed 2000rpm), followed by an anodic aluminum oxide (AAO) layer with a pore size of 80-100nm, (the size is 1cm × 1cm, that is, The electrode area participating in the electrochemical reaction is 1cm 2 ), placed in a vacuum oven at 150°C for 2 hours to obtain a working electrode. Prepare 0.1 mol / L cobaltous sulfate and boric acid aqueous solutions respectively, and use them as the electrolyte of the three-electrode system after mixing.

[0032] Using a three-electrode system, the counter electrode is a platinum sheet electrode, the reference electrode is a saturated calomel electrode, the current-time method is selected, the voltage is -1.5V, and the electrodeposition is carried out on the working electrode, and the deposition time is 60min. After electrodeposition, the anodized aluminum template was removed with 1mol / L sodium hydroxide solution, and fi

[0035] Selectively coat a layer of 6% polyvinyl alcohol solution on the conductive glass FTO, then adhere the anodic aluminum oxide (AAO) layer with a pore size of 40-70nm, put it in a vacuum oven at 150°C for 2 hours, and obtain the working electrode (size 1cm x 1cm). Prepare 0.1 mol / L cobaltous sulfate and boric acid aqueous solutions respectively, and mix them as the electrolyte solution of the three-electrode system.

[0036] Using a three-electrode system, the counter electrode is a platinum sheet electrode, the reference electrode is a saturated calomel electrode, the current-time method is selected, the voltage is -1.5V, and the electrodeposition is carried out on the working electrode, and the deposition time is 60min. After electrodeposition, the anodized aluminum template was removed with 1mol / L sodium hydroxide solution, and finally the working electrode was cleaned three times with ultrapure water.

[0037] The SEM spectrum of the obtained material is as image

[0039] Spin-coat a layer of 6% polyvinyl alcohol solution on the conductive glass FTO (spin-coating speed 2000rpm), then adhere an anodic aluminum oxide (AAO) layer with a pore size of 160-200nm, and put it in a vacuum oven at 150°C for 2 hours , to get the working electrode. Prepare 0.1 mol / L cobaltous sulfate and boric acid aqueous solutions respectively, and mix them as the electrolyte solution of the three-electrode system.

[0040] Using a three-electrode system, the counter electrode is a platinum sheet electrode, the reference electrode is a saturated calomel electrode, the current-time method is selected, the voltage is -1.5V, and the electrodeposition is carried out on the working electrode, and the deposition time is 60min. After electrodeposition, the anodized aluminum template was removed with 1mol / L sodium hydroxide solution, and finally the working electrode was cleaned three times with ultrapure water.

[0041] The SEM spectrum of the obtained material is as