Crossley Kenneth, Schmidt Thomas J, Fabbri Emiliana
PSI Center for Energy and Environmental Science, 5232 Villigen PSI, Switzerland.
Institute for Molecular Physical Science, ETH Zürich, CH-8093 Zürich, Switzerland.
Chem Commun (Camb). 2025 Jul 29;61(62):11529-11537. doi: 10.1039/d5cc02438b.
Focusing on five key concepts, we review the roles of cation and oxygen vacancies in determining the surface reconstruction pathway, reaction mechanism, and ultimate activity of cobalt-based oxygen evolution reaction (OER) electrocatalysts. Cation and oxygen vacancies can initiate reactant adsorption, facilitating active surface reconstruction, and can switch the dominant mechanism from the adsorbate evolution mechanism (AEM) to the lattice oxygen evolution mechanism (LOEM). However, these effects are facet-dependent. Rigorous oxygen vacancy quantification promises to identify the OER mechanism steering thresholds and unlock the full potential of vacancy engineering. Finally, oxygen vacancy quantification strategies are critically examined to facilitate this goal.
聚焦于五个关键概念，我们回顾了阳离子和氧空位在决定钴基析氧反应（OER）电催化剂的表面重构途径、反应机理及最终活性方面的作用。阳离子和氧空位可引发反应物吸附，促进活性表面重构，并能将主导机制从吸附质析出机制（AEM）转变为晶格氧析出机制（LOEM）。然而，这些效应取决于晶面。精确的氧空位定量有望确定OER机制的转向阈值并释放空位工程的全部潜力。最后，对氧空位定量策略进行了批判性审视以推动这一目标的实现。
