As the anode reaction of proton exchange membrane water electrolysis (PEMWE), the acidic oxygen evolution reaction (OER) is one of the main obstacles to the practical application of PEMWE due to its sluggish four‐electron transfer process. The development of high‐performance acidic OER electrocatalysts has become the key to improving the reaction kinetics. To date, although various excellent acidic OER electrocatalysts have been widely researched, Ir‐based nanomaterials are still state‐of‐the‐art electrocatalysts. Hence, a comprehensive and in‐depth understanding of the reaction mechanism of Ir‐based electrocatalysts is crucial for the precise optimization of catalytic performance. In this review, the origin and nature of the conventional adsorbate evolution mechanism (AEM) and the derived volcanic relationship on Ir‐based electrocatalysts for acidic OER processes are summarized and some optimization strategies for Ir‐based electrocatalysts based on the AEM are introduced. To further investigate the development strategy of high‐performance Ir‐based electrocatalysts, several unconventional OER mechanisms including dual‐site mechanism and lattice oxygen mediated mechanism, and their applications are introduced in detail. Thereafter, the active species on Ir‐based electrocatalysts at acidic OER are summarized and classified into surface Ir species and O species. Finally, the future development direction and prospect of Ir‐based electrocatalysts for acidic OER are put forward.

中文翻译：

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从反应机理的起源研究铱基酸性析氧反应电催化剂的最新研究


作为质子交换膜水电解（PEMWE）的阳极反应，酸性析氧反应（OER）因其缓慢的四电子传递过程而成为PEMWE实际应用的主要障碍之一。开发高性能酸性OER电催化剂已成为改善反应动力学的关键。迄今为止，尽管各种优异的酸性OER电催化剂已被广泛研究，但铱基纳米材料仍然是最先进的电催化剂。因此，全面深入地了解铱基电催化剂的反应机理对于催化性能的精确优化至关重要。在这篇综述中，总结了传统吸附质演化机制（AEM）的起源和性质以及酸性 OER 过程中铱基电催化剂的火山关系，并介绍了一些基于 AEM 的铱基电催化剂的优化策略。为了进一步研究高性能Ir基电催化剂的开发策略，详细介绍了双位点机制和晶格氧介导机制等几种非常规OER机制及其应用。此后，对酸性 OER 下 Ir 基电催化剂上的活性物种进行了总结，并将其分为表面 Ir 物种和 O 物种。最后，提出了酸性OER铱基电催化剂的未来发展方向和展望。