Electrochemical energy source conversion and storage material as well as preparation method and application thereof
A storage material and electrochemical technology, applied in the field of iridium-based electrocatalytic materials and their preparation, to achieve the effects of enriching catalytic active sites, realizing full charge and discharge, high stability and high catalytic activity
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Embodiment 1
[0030] The nickel foam with a thickness of 200 μm was cleaned in 3 M HCl solution for 15 min, and then cleaned with deionized water for later use. Prepare 8 mL of 0.005 M IrCl 3 The aqueous solution was transferred to a corresponding glass container, and then the treated foamed nickel substrate was placed in the above solution, then transferred to a homogeneous reactor, and reacted at 80°C for 2h. After cooling to room temperature, rinse with deionized water to obtain the corresponding Ir-based electrode.
[0031] figure 1 is the SEM image of the obtained electrode, from figure 1 It can be seen that the electrode presents a three-dimensional interwoven nanosheet structure.
[0032] Test its OER and HER performance in 1M KOH solution, the results are as follows figure 2 shown. For OER reaction, 10mA / cm 2 Under the current density, its overpotential η 10 =215mV; for HER response, 10mA / cm 2 At a current density of , the electrode overpotential η 10 =40mV, both are super...
Embodiment 2
[0034] The titanium foam with a thickness of 250 μm was ultrasonically cleaned in acetone for 20 min, and then cleaned with deionized water. Prepare 35 mL of 0.001 M IrCl 3 The aqueous solution was transferred to a 50 mL autoclave with PTFE lining, and then the treated nickel foam substrate was placed in the above solution, then transferred to a homogeneous reactor, and reacted at 150 °C for 4 h. After cooling to room temperature, rinse with deionized water to obtain the corresponding Ir-based electrode.
[0035] Test its OER and HER performance in 0.1M KOH solution, the results are as follows image 3 shown. For OER reaction, 10 mA / cm 2 Under the current density, its overpotential η 10 =364 mV; for HER response, 10 mA / cm 2 At a current density of , the electrode overpotential η 10 =87 mV, the OER and HER activities are better than those of commercial Ir / C and Pt / C catalysts, respectively.
Embodiment 3
[0037] The nickel foam with a thickness of 250 μm was cleaned in 3M HCl solution for 15 min, and then cleaned with deionized water. Next, 8 mL of 0.005 M sodium chloroiridate aqueous solution was prepared and transferred to a corresponding glass container, then the treated foamed nickel substrate was placed in the above solution, and then transferred to a homogeneous reactor for reaction at 90 °C for 4 h. After cooling to room temperature, the electrode was taken out and cleaned with deionized water to obtain the corresponding Ir-based electrode.
[0038] at 0.5M H 2 SO 4 Test its OER and HER performance in the electrolyte, the test results are as follows Figure 4 shown. 10mA / cm 2 HER overpotential η at a current density of 10 =100 mV, reaching the level of commercial Pt / C catalysts; OER overpotential η 10 =250 mV, the overpotential is lower than most literature levels and higher than the activity of commercial Ir / C catalysts.
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