High-entropy materials have received increasing attention due to their unique physicochemical characteristics and remarkable properties for oxygen evolution reaction (OER). The synthesis of high-entropy metal phosphides (HEMPs) has rarely been reported owing to the incompatibility between different metal ions and phosphorus. Herein, the phosphorus vacancies (Pv) enriched N-doped C HEMPs (N-C@CoNiMnCuFeP/NF) for OER were prepared by a facile ZIF-derived phosphide method. Abundant Pv and amorphous structures increase the active sites and modulate the electronic structure of electrocatalyst to improve the OER performance. Besides, the synergistic effect among the metallic elements is beneficial for enhancing the electrocatalytic activity. Accordingly, HEMP-450 shows outstanding catalytic performance with the overpotential of 199 mV and continuously reacts for 140 hours without performance degradation for OER at 100 mA cm. This work demonstrates a simple template strategy for reasonably preparing HEMPs electrocatalyst with rich Pv.

中文翻译：

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富磷空位氮掺杂碳高熵金属磷化物用于高效电催化水氧化

高熵材料因其独特的物理化学特性和显着的析氧反应（OER）性能而受到越来越多的关注。由于不同金属离子与磷之间的不相容性，高熵金属磷化物（HEMP）的合成鲜有报道。在此，通过简单的 ZIF 衍生磷化物方法制备了用于 OER 的磷空位（Pv）富集的 N 掺杂 C HEMP（NC@CoNiMnCuFeP/NF）。丰富的Pv和非晶结构增加了活性位点并调节电催化剂的电子结构以提高OER性能。此外，金属元素之间的协同效应有利于提高电催化活性。因此，HEMP-450表现出出色的催化性能，过电势为199 mV，在100 mA cm下OER连续反应140小时，性能没有下降。这项工作展示了一种合理制备具有丰富 Pv 的 HEMP 电催化剂的简单模板策略。