A sulfur-doped cuprous oxide three-dimensional nanoporous material and its application in electrochemical hydrogen evolution reaction
A cuprous oxide, three-dimensional nanotechnology, applied in copper oxide/copper hydroxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of difficult control of stability, reduced catalytic performance of catalysts, poor conductivity, etc. problem, to achieve the effect of reducing intermediate energy, improving stability and improving performance
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Embodiment 1
[0020] Example 1: This example prepares a three-dimensional nanoporous material of sulfur-doped cuprous oxide, which specifically includes the following steps:
[0021] (1) Dissolve 6.4 g of sodium hydroxide and 1.368 g of ammonium persulfate in 60 ml of deionized water, and stir well to obtain a mixed solution.
[0022] (2) Put the foamed copper obtained after cleaning into the mixed solution, soak at room temperature 25°C for 20 min, take out deionized water and rinse, N 2 It blows dry, obtains the foamed copper that forms copper hydroxide on the surface;
[0023] (3) Soak the copper foam treated in step 2 in Na 2 Soak in S solution for 24 h at room temperature 25°C, the Na 2 The concentration of S is 0.05mol / L, and the solvent is composed of deionized water and methanol according to the volume ratio of 1:1; then take it out and rinse it with deionized water, N 2 Blow dry to obtain foamed copper with cuprous sulfide on the surface.
[0024] (4) Activate the copper foam t...
Embodiment 2
[0029] Embodiment 2: the present embodiment studies the activation process, specifically as follows:
[0030] The copper foam loaded with cuprous sulfide on the surface is activated by electrochemical cyclic voltammetry cv to obtain sulfur-doped cuprous oxide converted from cuprous sulfide. The potential window of cv activation is 0.1V~-0.8V vs RHE, The scan rate is 100mV / s, the number of cycles is 1500, and the electrolyte is 0.5M H 2 SO 4 , the counter electrode is a Pt sheet.
[0031] like image 3 As shown, in the process of preparing sulfur-doped cuprous oxide three-dimensional nanoporous materials from cuprous sulfide by cyclic voltammetry, the polarization curves (Polarization curves) corresponding to 0 cycles, 500 cycles, 1000 cycles, and 1500 cycles respectively, It can be seen that as the number of cyclic voltammetry cycles increases, the catalytic performance of the material is gradually optimized, and the performance is stable after activation to 1500 cycles, so...
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