近日，东南大学彭生杰团队研究了基于高熵支持的Ru单原子稳定晶格氧机制。相关论文于2026年5月12日发表在《美国化学会志》上。

晶格氧机制（LOM）已成为增强酸性析氧反应（OER）活性的有效途径。然而，晶格氧的广泛参与往往会导致缺陷积累和骨架失稳，严重限制了催化剂的耐久性。

研究组提出，将Ru单原子锚定在高熵氧化物（Ru-(FeCoNiCrMn)₃O₄）上，可以在Ru位点建立一条稳定的LOM路径，同时实现高活性和长期结构完整性。高熵效应增强了Ru 4d-O 2p杂化，降低了晶格氧氧化的能垒，并促进了Ru位点附近的晶格氧与吸附氧物种之间直接的O_lat–O_ad耦合。与此同时，界面氢键网络的破坏富集了具有高反应活性的弱氢键自由水，使得水来源的氧能够快速填充晶格氧缺陷。

这种动态的缺陷修复过程保护了Ru位点的局域配位环境，防止了不可逆的结构退化。因此，Ru-(FeCoNiCrMn)₃O₄催化剂在0.5 M H₂SO₄中达到10 mA cm^-2仅需204 mV过电位，并在相对于RHE为1.50 V时表现出5235.42 A g_Ru^-1的高质量活性。采用Ru-(FeCoNiCrMn)₃O₄阳极的质子交换膜电解槽可以在500 mA cm^-2下稳定运行超过320小时。这项工作提出了一种同时增强催化剂活性和稳定性的新策略。

附：英文原文

Title: Stabilizing Lattice Oxygen Mechanism on Ru Single Atoms via a High-Entropy Support for Acidic Oxygen Evolution

Author: Luqi Wang, Yixin Hao, Suwan Bi, Sung-Fu Hung, Kang-Shun Peng, Han-Yi Chen, Tsung-Yi Chen, Ying Zhang, Gengyu Xing, Linlin Li, Feng Hu, Yuping Wu, Shengjie Peng

Issue&Volume: May 12, 2026

Abstract: The lattice oxygen mechanism (LOM) has emerged as an effective route to enhance acidic oxygen evolution reaction (OER) activity. However, extensive lattice-oxygen participation often leads to defect accumulation and framework destabilization, severely limiting catalyst durability. Herein, we propose that anchoring Ru single atoms on a high-entropy oxide (Ru-(FeCoNiCrMn)3O4) establishes a stabilized LOM pathway at the Ru sites, combining high activity with long-term structural integrity. The high-entropy effect strengthens Ru 4d-O 2p hybridization, lowering the energetic barrier for lattice-oxygen oxidation and facilitating direct Olat–Oad coupling between lattice oxygen near the Ru sites and adsorbed oxygen species. In parallel, disruption of the interfacial hydrogen-bond network enriches weakly hydrogen-bonded free water with high reactivity, enabling rapid incorporation of water-derived oxygen into lattice-oxygen defects. This dynamic defect-refilling process preserves the local coordination environment of Ru sites and prevents irreversible structural degradation. Consequently, the Ru-(FeCoNiCrMn)3O4 catalyst only needs an overpotential of 204 mV to reach 10 mA cm–2 in 0.5 M H2SO4 and delivers a high mass activity of 5235.42 A gRu–1 at 1.50 V vs RHE. The proton exchange membrane electrolyzer with a Ru-(FeCoNiCrMn)3O4 anode can operate stably for over 320 h at 500 mA cm–2. This work presents a novel strategy for simultaneously enhancing catalyst activity and stability.

DOI: 10.1021/jacs.6c02539

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.6c02539