Metal / metal chalcogenide electrode with high specific surface area
A specific surface area and electrode technology, which is applied in the field of oxidizing water into molecular oxygen, can solve problems such as high overvoltage
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Embodiment 1
[0158] Example 1: Preparation of copper / copper oxide electrode according to the present invention on a copper substrate
[0159] 1cm 2 The freshly cleaned copper plate is immersed in 20ml of 0.2M CuSO 4 , 1.5M H 2 SO 4 In the solution, a current of 0.5A was applied for 80 seconds using the constant current method. The electrode was then removed from the solution and washed with a large amount of distilled water and dried under vacuum (10 mbar). The electrode was then transferred to an oven under a static air atmosphere (1 bar). The temperature was increased to 310°C at a rate of 10°C per minute, and then the temperature was kept constant for 1 hour. After this step, the electrode was cooled to room temperature and stored in air. Then the electrode was named Cu / Cu x O y electrode. figure 1 A and figure 1 C shows the SEM image of the electrode and shows the porous nanostructure and high specific surface area of the material. The X-ray powder diffraction pattern of the electr...
Embodiment 2
[0160] Example 2: Preparation of copper / copper sulfide electrode according to the present invention on a copper substrate
[0161] 1cm 2 The freshly cleaned copper plate is immersed in 20ml of 0.2M CuSO 4 , 1.5M H 2 SO 4 In the solution, a current of 0.5A was applied for 80 seconds using the constant current method. The electrode was then removed from the solution and washed with a large amount of distilled water and dried under vacuum (10 mbar). The electrode was then transferred to a glass reactor containing 15 mg of elemental sulfur powder, which was separated from the compartment but connected to the rest of the reactor where the electrode was located. A vacuum (0.01 mbar) is generated in the reactor (including in the compartment containing elemental sulfur), which is kept under a static vacuum and placed in an oven. The overall temperature was increased to 150°C at a rate of 15°C / min, and then the temperature was maintained at 150°C for 2 minutes. After this step, the reac...
Embodiment 3
[0164] Example 3: Cu / Cu x O y Measurement of catalytic activity of electrode water oxidation
[0165] Use Cu / Cu x O y The electrode is used as a working electrode, in 1.0M NaOH aqueous solution, with a fixed overvoltage of 400mV applied for water electrolysis. A large amount of oxygen was observed at the electrode. The oxygen produced is quantified by gas chromatography. After 10 minutes of electrolysis, O 2 The yield of Faraday released is estimated to be 89% (consumption of 2.2C, production of 5.14μmol O 2 , 0.5cm 2 The electrode is inserted into the solution).
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