Electrocatalytic urea oxidation reaction (UOR) with a low thermodynamic potential is a perfect substitute for anodic oxygen evolution process (OER) in the effective generation of hydrogen. However, because of the slow kinetics of UOR, its potential application for commercial use remains untapped. Nickel-based materials may be an option for urea oxidation reaction but the heavily filled d orbital prevents enhanced adsorption and activity. Here, taking into account the adsorption-energy scaling limitations, Co with partially filled d orbital is introduced into nickel selenide to form a heterointerface catalyst (2D CoSe/NiSe) that enhances UOR. As anticipated, the 2D CoSe/NiSe electrode displays a low potential of 1.33 V to achieve 100 mA cm for UOR while retaining strong durability for 300 h. Further, 2D CoSe/NiSe catalyst is used as an anode in an anion exchange membrane flow electrolyzer, which achieved an industrial-level voltage of 1.91 V at 1 A cm and robust durability.

中文翻译：

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二元金属硒化物异质界面催化剂上的工程活性位点促进尿素电氧化

具有低热力学势的电催化尿素氧化反应（UOR）是有效产生氢气的阳极析氧过程（OER）的完美替代品。然而，由于 UOR 的动力学缓慢，其商业用途的潜在应用仍未开发。镍基材料可能是尿素氧化反应的一种选择，但大量填充的 d 轨道阻碍了吸附和活性的增强。在这里，考虑到吸附能尺度限制，将部分填充d轨道的Co引入到硒化镍中，形成异质界面催化剂（2D CoSe/NiSe），从而增强UOR。正如预期的那样，2D CoSe/NiSe 电极显示出 1.33 V 的低电位，可实现 100 mA cm 的 UOR，同时保持 300 小时的强大耐用性。此外，2D CoSe/NiSe催化剂用作阴离子交换膜流电解槽的阳极，在1 A cm时实现了1.91 V的工业级电压和强大的耐用性。