Optimizing the efficiencies of both electron transport and chloridion repulsion are highly desired for achieving high-performance oxygen evolution reaction (OER) electrocatalysts in seawater oxidation, but still remains a huge challenge. In this study, an efficient synthetic method is developed to successfully synthesize a novel heterogeneous hollow polyhedron nanocages (denoted as NiCoO/NiCoP) with directional electron transport and strong chloridion repulsion properties, which profits from its diverse work functions and anion electrostatic repulsion in heterojunction nanostructure, respectively. Accordingly, NiCoO/NiCoP exhibits superior OER activity in 1 M KOH (η = 325 mV@10 mA cm) and alkaline simulated seawater (η = 340 mV@10 mA cm), as well as outstanding long-term stability. Density functional theory calculations demonstrate that the construction of NiCoO/NiCoP heterojunction promotes the directional electron transport in the heterogeneous interface and enables strong chloridion repulsion in comparison with individual NiCoO and NiCoP, thus largely improving its OER performance in alkaline simulated seawater.

中文翻译：

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分层 NiCo2O4/NiCoP 异质结实现定向电子传输和强氯离子排斥，可实现高效海水氧化


为了在海水氧化中实现高性能析氧反应（OER）电催化剂，非常需要优化电子传输和氯离子排斥的效率，但这仍然是一个巨大的挑战。在本研究中，开发了一种有效的合成方法，成功合成了一种新型异质空心多面体纳米笼（表示为NiCoO/NiCoP），该纳米笼具有定向电子传输和强氯离子排斥特性，其得益于异质结纳米结构中的多样化功函数和阴离子静电排斥作用， 分别。因此，NiCoO/NiCoP 在 1 M KOH (η = 325 mV@10 mA cm) 和碱性模拟海水 (η = 340 mV@10 mA cm) 中表现出优异的 OER 活性，以及​​出色的长期稳定性。密度泛函理论计算表明，与单独的NiCoO和NiCoP相比，NiCoO/NiCoP异质结的构建促进了异质界面中的定向电子传输，并具有较强的氯离子排斥力，从而大大提高了其在碱性模拟海水中的OER性能。