Efficient electrocatalysts for oxygen evolution are vitally important for regenerative fuel cells and metal-air batteries. Herein, 3D mesoporous and ultrathin array of CoN nanosheets are synthesized on the Ni foam via thermal transformation of Co₃O₄ nanowire arrays. This array imparts enhanced active sites, mass diffusion, and electron transfer towards oxygen evolution reaction. The low overpotential of 323 mV at 30 mA cm⁻², a Tafel slope of 74 mV dec⁻¹, and a high potential conservation in a long process of electrolysis process are achieved. It is thus one robust and efficient electrocatalyst for OER.

中文翻译：

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氮化钴纳米片的中孔和超薄阵列，用于电催化氧气的释放

用于氧气释放的高效电催化剂对于可再生燃料电池和金属空气电池至关重要。在此，通过Co ₃ O ₄纳米线阵列的热转化，在Ni泡沫上合成了CoN纳米片的3D中孔和超薄阵列。该阵列赋予增强的活性位点，质量扩散和电子向氧释放反应的转移。在30 mA cm ^{-2的情况下}，低电势为323 mV ，Tafel斜率为74 mV dec ^-1，在长时间的电解过程中实现了高电势守恒。因此，它是一种用于OER的强大而有效的电催化剂。