Copper-based composite nanomaterial, and preparation method and application thereof
A copper-based composite, nanomaterial technology, applied in the direction of electrolytic organic production, electrolytic components, electrolytic process, etc., can solve problems such as difficulties, and achieve the effects of abundant active sites, excellent catalytic activity, and obvious selectivity.
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Embodiment 1
[0071]The present embodiment provides a kind of copper oxide compound (H-Cu / Cu x OF) copper-based composite nanomaterial, the preparation method of this copper-based nanocomposite is as follows:
[0072] 1. Synthesis of CuOHF precursor
[0073] CuOHF was synthesized by a one-step hydrothermal method as follows: 0.46 g of copper nitrate trihydrate and 0.21 g of hexamethylenetetramine (HMT) were dissolved in 15 mL of deionized water, stirred at room temperature for 10 min, and then added under constant stirring After adding 0.44g of KF, stirring was continued for 15 minutes. The above mixed solution was poured into a stainless steel-lined polytetrafluoroethylene autoclave and sealed. It was then heated in an oven at a rate of 5°C / min to 95°C and held at this temperature for 2 hours. After the heat preservation, the autoclave was naturally cooled to room temperature, the reaction product was centrifuged and washed several times with deionized water, and finally washed several ...
Embodiment 2
[0102] This embodiment provides a copper-based composite nanomaterial. The difference from Example 1 is that copper nanosheets with high-energy crystal planes are dispersed in chlorine-modified two-dimensional nano-copper oxides. The difference between the preparation method and Example 1 is that Equimolar KCl was used instead of KF. The copper-based composite material has a similar morphology and structure to Example 1 after testing, while the CO 2 RR experiments show that it has high selectivity for acetate production at low potentials and the effect of inhibiting hydrogen production and improving the Faradaic efficiency of carbon dioxide reduction at various potentials.
Embodiment 3
[0104] This embodiment provides a copper-based composite nanomaterial. The difference from Example 1 is that copper nanosheets with high-energy crystal planes are dispersed in bromine-modified two-dimensional nano-copper oxides. The difference between the preparation method and Example 1 is that Equimolar NaBr was used instead of KF. The copper-based composite material has a similar morphology and structure to Example 1 after testing, while the CO 2 RR experiments show that it has high selectivity for acetate production at low potentials and the effect of inhibiting hydrogen production and improving the Faradaic efficiency of carbon dioxide reduction at various potentials.
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