Supported metal catalysts with appropriate metal‐support interactions (MSIs) hold a great promise for heterogeneous catalysis. However, ensuring tight immobilization of metal clusters/nanoparticles on the support while maximizing the exposure of surface active sites remains a huge challenge. Herein, we report an Ir/WO3 catalyst with a new enrooted‐type MSI in which Ir clusters are, unprecedentedly, atomically enrooted into the WO3 lattice. The enrooted Ir atoms decrease the electron density of the constructed interface compared to the adhered (root‐free) type, thereby achieving appropriate adsorption toward oxygen intermediates, ultimately leading to high activity and stability for oxygen evolution in acidic media. Importantly, this work provides a new enrooted‐type supported metal catalyst, which endows suitable MSI and maximizes the exposure of surface active sites in contrast to the conventional adhered, embedded, and encapsulated types.

中文翻译：

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扎根型金属-载体相互作用促进酸性介质中的析氧反应

具有适当金属-载体相互作用（MSI）的负载型金属催化剂对于多相催化具有广阔的前景。然而，确保金属簇/纳米颗粒在载体上的紧密固定，同时最大限度地暴露表面活性位点仍然是一个巨大的挑战。在此，我们报道了一种具有新的固定型 MSI 的 Ir/WO3 催化剂，其中 Ir 团簇前所未有地以原子方式固定在 WO3 晶格中。与粘附（无根）类型相比，扎根的 Ir 原子降低了所构建界面的电子密度，从而实现对氧中间体的适当吸附，最终导致在酸性介质中析氧的高活性和稳定性。重要的是，这项工作提供了一种新的根植型负载金属催化剂，与传统的粘附、嵌入和封装类型相比，它赋予合适的MSI并最大限度地暴露表面活性位点。