Exploring active, stable, and low‐cost bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is crucial for water splitting technology associated with renewable energy storage in the form of hydrogen fuel. Here, a newly designed antiperovskite‐based hybrid composed of a conductive InNNi₃ core and amorphous InNi(oxy)hydroxide shell is first reported as promising OER/HER bifunctional electrocatalyst. Prepared by a facile electrochemical oxidation strategy, such unique hybrid (denoted as EO‐InNNi₃) exhibits excellent OER and HER activities in alkaline media, benefiting from the inherent high‐efficiency HER catalytic nature of InNNi₃ antiperovskite and the promoting role of OER‐active InNi(oxy)hydroxide thin film, which is confirmed by theoretical simulations and in situ Raman studies. Moreover, an alkaline electrolyzer integrated EO‐InNNi₃ as both anode and cathode delivers a low voltage of 1.64 V at 10 mA cm⁻², while maintaining excellent durability. This work demonstrates the application of antiperovskite‐based materials in the field of overall water splitting and inspires insights into the development of advanced catalysts for various energy applications.

中文翻译：

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通过电化学诱导的杂结构抗钙钛矿/（羟基）氢氧杂化物实现高效水分解

探索用于氧释放反应（OER）和氢释放反应（HER）的活性，稳定和低成本双功能电催化剂，对于与可再生能源以氢燃料形式存储的水分解技术至关重要。在这里，首次报道了由导电的InNNi ₃核和无定形的InNi（羟基）氢氧化物壳组成的基于抗钙钛矿的新型混合体，是有前途的OER / HER双功能电催化剂。通过简便的电化学氧化策略制备的这种独特的杂化体（称为EO-InNNi ₃）在碱性介质中显示出出色的OER和HER活性，这得益于InNNi ₃固有的高效HER催化性质理论模拟和原位拉曼研究证实了抗钙钛矿和OER活性InNi（羟基）氢氧化物薄膜的促进作用。此外，集成了EO-InNNi ₃作为阳极和阴极的碱性电解槽在10 mA cm ^-2时可提供1.64 V的低压，同时保持出色的耐久性。这项工作展示了抗钙钛矿基材料在整个水分解领域的应用，并激发了对开发用于各种能源应用的先进催化剂的见识。