Poly(heptazine imides) hosting cobalt ions as countercations are presented as promising electrocatalysts for the oxygen evolution reaction (OER). A facile mixed-salt melt-assisted condensation is developed to prepare such cobalt poly(heptazine imides) (PHI-Co). The Co ions can be introduced in well-controlled amounts using this method, and are shown to be atomically dispersed within the imide-linked heptazine matrix. When applied to electrocatalytic OER, PHI-Co shows a remarkable activity with an overpotential of 324 mV and Tafel slope of 44 mV dec-1 in 1 m KOH.

中文翻译：

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钴交换聚（庚嗪酰亚胺）作为氧释放反应的过渡金属-Nx电催化剂。

提出了以钴离子作为抗衡阳离子的聚（庚嗪酰亚胺）作为有氧放出反应（OER）的有前途的电催化剂。开发了一种简便的混合盐熔融辅助缩合法，以制备这种钴聚（庚嗪酰亚胺）（PHI-Co）。可以使用此方法以可控的量引入Co离子，并且Co离子被原子分散在酰亚胺连接的庚嗪基质中。当应用于电催化OER时，PHI-Co在1 m KOH中表现出显着的活性，超电势为324 mV，Tafel斜率为44 mV dec-1。