Ethylene diamine-based porous organic polymer (EPOP) was synthesized, carbonized at different temperatures, and characterized. The successful formation of the triazine polymer was confirmed by Fourier-transform infrared spectroscopy, ¹³C, and ¹⁵N cross-polarization magic angle spinning solid-state NMR. The two-dimensional layered architecture and graphitic nature of the samples resembled that of nitrogen-doped amorphous carbon, as confirmed by Raman, powder X-ray diffraction, and transmission electron microscopy measurements. The catalytic activity of these materials toward nitrophenol reduction and electrocatalytic activity toward oxygen evolution reaction (OER) were systematically evaluated in detail. Electrocatalytic activity toward oxygen evolution reaction was systematically evaluated by chronoamperometry and linear sweep voltammetry. Results clearly demonstrate that all of these catalysts exhibit good OER activity and excellent stability. Among all catalysts, EPOP-700 showed better OER activity, as reflected by its onset potential and current density, comparable with that of the metal-based OER catalysts and better than that of metal-free catalysts. Further, their catalytic activity toward the reduction of 4-nitrophenol to 4-aminophenol was tested with NaBH₄; although all of these catalysts showed good catalytic activity; EPOP-800 displayed better catalytic activity.

中文翻译：

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多孔有机聚合物衍生的碳复合材料作为双峰催化剂用于氧释放反应和硝基苯酚的还原

合成了乙二胺基多孔有机聚合物（EPOP），并在不同温度下对其进行了碳化和表征。通过傅立叶变换红外光谱，¹³ C和¹⁵确认三嗪聚合物的成功形成N交叉极化幻角旋转固态NMR。样品的二维分层结构和石墨性质类似于氮掺杂的无定形碳，通过拉曼，粉末X射线衍射和透射电子显微镜测量得到证实。详细评估了这些材料对硝基苯酚还原的催化活性和对氧释放反应（OER）的电催化活性。通过计时电流法和线性扫描伏安法系统地评估了对氧释放反应的电催化活性。结果清楚地表明，所有这些催化剂均显示出良好的OER活性和出色的稳定性。在所有催化剂中，EPOP-700表现出更好的OER活性，这体现在它的起始电势和电流密度，与金属基OER催化剂的性能相当，并且比不含金属的催化剂更好。此外，用NaBH测试了它们对将4-硝基苯酚还原为4-氨基苯酚的催化活性。₄ ; 尽管所有这些催化剂都显示出良好的催化活性。EPOP-800表现出更好的催化活性。