本研究使用了一種聚合物-水凝膠策略製備氮配位鎳單原子催化劑的方法。該方法在碳材料上成功合成了均勻原子分散的氮配位鎳位點。在這種方法中，以吡咯（py）作為聚合單體，過硫酸銨（APS）作為聚合反應引發劑。同時，添加十二烷基硫酸鈉（SDS）以誘導吡咯形成多孔性凝膠軟模板。相較於傳統模板方法須使用強酸去除模板，軟模板具有易於去除和環保等優點。此外，在退火後形成的單原子催化劑即可達到高效能，無需進行酸處理，這使得該方法具有廣泛的應用潛力。SDS 的添加還有助於最小化催化劑的尺寸，並增加活性位點的密度。這種氮配位鎳單原子催化劑在電化學 CO 生成反應中表現出優異的性能。在電位為-0.47V 時，該催化劑已經達到 90%以上的 CO 法拉第效率。當電位為-0.77V 時，CO 法拉第效率可達到最大的97%。此外，在電位為-0.97V 時，該催化劑表現出高達 170mA 的電流密度。

This research report presents a method for synthesizing nitrogencoordinated nickel single-atom catalysts using a polymer-water gel strategy. The method successfully achieves uniform atomic dispersion of nitrogen-coordinated nickel sites on carbon materials. In this approach, pyrrole (py) serves as the polymerization monomer, while ammonium persulfate (APS) acts as the polymerization initiator. Additionally, the
addition of sodium dodecyl sulfate (SDS) induces the formation of a porous gel soft template to guide pyrrole into a gel state. Compared to traditional template methods that require strong acids for template removal, the soft template offers advantages such as easy removal and environmental friendliness. Moreover, the resulting single-atom catalyst, obtained after annealing, exhibits high efficiency without the need for acid treatment, making this method highly promising for various applications. The inclusion of the SDS also helps minimize the catalyst's size and increase the density of the active sites. This nitrogen-coordinated nickel single-atom catalyst demonstrates excellent performance in the electrochemical CO generation reaction. At
a potential of -0.47V, the catalyst achieves a CO Faradaic efficiency of over 90%. At a potential of -0.77V, the CO Faradaic efficiency reaches a maximum of 97%. Furthermore, at a potential of -0.97V, the catalyst exhibits a high current density of up to 170mA.

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