A preparation method of c-n co-doped titanium dioxide electrode, application of electrolysis of water in acidic solution to produce hydrogen peroxide
A titanium dioxide, acid solution technology, used in electrodes, electrolysis components, electrolysis processes, etc.
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Embodiment 1
[0034] An embodiment of the present invention is a method for preparing a C-N co-doped titanium dioxide electrode, including the following steps:
[0035] (1) Titanium dioxide nanotube array (TiO 2 -NTs) preparation:
[0036] 1.1) First, the 8cm×1cm titanium sheet is smoothed with 800 mesh, 1500 mesh, and 300 mesh sandpaper in sequence, and then deionized water and ethanol are used to alternately wash away impurities and grease on the surface of the titanium sheet;
[0037] 1.2)TiO 2 -NTs are prepared by electrochemical anodic oxidation: a two-electrode system is constructed through a DC stabilized power meter, with 0.7M sodium sulfate, 0.5M phosphoric acid, 0.2M trisodium citrate and 0.5% sodium fluoride as the electrolyte (pH=3.0 ), with the titanium sheet as the anode and the platinum wire electrode as the counter electrode, the two electrodes are separated by 2cm, respectively inserted into the electrolyte 2cm, and electrolyzed at 20V voltage for 2h; then the titanium sheet is ta...
Embodiment 2
[0047] The C-N-TiO prepared in Example 1 2 Take it out and perform an electrocatalytic performance test under a pH=3 environment. Adopt three electrode system, working electrode is C-N-TiO 2 , The counter electrode is a platinum wire, the two electrodes are separated by 2cm, and the reference electrode is Ag / AgCl, which is located between the working electrode and the counter electrode, respectively inserted 2cm below the electrolyte surface. Electrolyte is 0.05M Na 2 SO 4 , And use H 2 SO 4 Adjust pH to 3, use CHI 660e electrochemical workstation to analyze C-N-TiO 2 Conduct electrocatalytic performance test.
[0048] 1) LSV test, experiment setting scan range 1.0~0.1V (vs Ag / AgCl), scan rate 0.005V / s; the results show that the 600A electrode has inert behavior, and the starting potential of 600N (3.04V vs RHE) is higher than 500N (3.10) V vs RHE), 700N (3.17V vs RHE), 400N (3.37V vs RHE) are all low, indicating that the catalytic activity of 600N is significantly enhanced ( Fi...
Embodiment 3
[0051] The application of a C-N co-doped titanium dioxide electrode in this embodiment to electrolyze water to produce hydrogen peroxide in an acidic solution includes the following steps:
[0052] 1) A three-electrode system is adopted, and the working electrode is C-N-TiO 2 , The counter electrode is platinum wire, the two electrodes are separated by 2cm, and the reference electrode is Ag / AgCl (saturated KCl solution), which is located between the working electrode and the counter electrode, and is inserted 2cm under the electrolyte. The electrolyte is 0.05M Na 2 SO 4 , And use H 2 SO 4 Adjust the pH to 3 and use CHI 660e electrochemical workstation to test.
[0053] 2) Set the voltage to 2.9V (vs Ag / AgCl) in the chronoamperometry and the time is 1.5h ( Figure 8 ), continue to stir with a magnetic stirrer. It can be seen from the figure that untreated, 600A did not generate H after 1.5h electrolysis 2 O 2 , And 400N, 500N, 600N, 700N can all generate H under the same conditions...
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