Reducing green hydrogen production costs is essential for developing a hydrogen economy. Developing cost‐effective electrocatalysts for water electrolysis is thus of great research interest. Among various material candidates, transition metal phosphides (TMP) have emerged as robust bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) due to their various phases and tunable electronic structure. Recently, heterostructured catalysts have exhibited significantly enhanced activities toward HER/OER. The enhancement can be attributed to the increased amount of accessible active sites, accelerated mass/charge transfer, and optimized adsorption of intermediates, which arise from the synergistic effects of the heterostructure. Herein, a comprehensive overview of the recent progress of bifunctional TMP‐based heterostructure is introduced to provide an insight into their preparation and corresponding reaction mechanisms. It starts with summarizing general fundamental aspects of HER/OER and the synergistic effect of heterostructures for enhanced catalytic activity. Next, the innovational strategies to design and construct bifunctional TMP‐based heterostructures with enhanced overall water splitting activity, as well as the related mechanisms, are discussed in detail. Finally, a summary and perspective for further opportunities and challenges are highlighted for the further development of bifunctional TMP‐based heterostructures from the points of practical application and mechanistic studies.

中文翻译：

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用于高效电化学水分解的双功能异质结构过渡金属磷酸盐

降低绿色氢气的生产成本对于发展氢气经济至关重要。因此，开发具有成本效益的用于水电解的电催化剂具有极大的研究兴趣。在各种候选材料中，由于过渡金属磷化物（TMP）的不同相和可调节的电子结构，它们已成为氢释放反应（HER）和氧释放反应（OER）的稳健双功能电催化剂。近来，杂结构催化剂对HER / OER表现出显着增强的活性。这种增强可以归因于可得的活性位点数量的增加，加速的质量/电荷转移以及优化的中间体吸附，这是由异质结构的协同效应产生的。在这里 本文介绍了基于双功能TMP的异质结构的最新进展，以全面了解其制备方法和相应的反应机理。它首先概述了HER / OER的一般基本方面以及杂结构增强催化活性的协同作用。接下来，将详细讨论设计和构建具有增强的总水分解活性的基于双功能TMP的异质结构的创新策略以及相关机制。最后，从实际应用和机理研究的角度，对基于双功能TMP的异质结构的进一步发展，突出了对进一步机遇和挑战的总结和观点。