Wang Luqi, Hung Sung-Fu, Zhao Sheng, Wang Yue, Bi Suwan, Li Shaoxiong, Ma Jian-Jie, Zhang Chenchen, Zhang Ying, Li Linlin, Chen Tsung-Yi, Chen Han-Yi, Hu Feng, Wu Yuping, Peng Shengjie
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.
Nat Commun. 2025 Apr 13;16(1):3502. doi: 10.1038/s41467-025-58654-0.
Developing ruthenium-based oxide catalysts capable of suppressing lattice oxygen participation in the catalytic reaction process is crucial for maintaining stable oxygen evolution reaction (OER) under acidic conditions. Herein, we delicately construct a RuO nanoparticle-anchored LiCoO nanosheet electrocatalyst (RuO/LiCoO), achieving dynamic optimization of RuO during the reaction process and improving catalytic stability. Benefiting from the unique electrochemical delithiation characteristics of the LiCoO support, the covalency of the Ru-O bond is effectively regulated during the OER process. The weakened Ru-O covalent bond inhibits the participation of lattice oxygen in the catalytic reaction and ensures the continuous operation of the Ru active sites. Moreover, the extended Ru-O bond in the optimized RuO/LiCoO catalyst reduces the formation energy barrier of the *OOH intermediates, accelerating the progress of the OER. As a result, the RuO/LiCoO catalyst requires only an overpotential of 150 ± 2 mV at 10 mA cm in 0.5 M HSO and operates stably for 2000 h at 1 A cm in a proton exchange membrane water electrolysis. This work opens new avenues for designing efficient ruthenium-based catalysts.
开发能够抑制晶格氧参与催化反应过程的钌基氧化物催化剂对于在酸性条件下维持稳定的析氧反应（OER）至关重要。在此，我们精心构建了一种RuO纳米颗粒锚定的LiCoO纳米片电催化剂（RuO/LiCoO），在反应过程中实现了RuO的动态优化并提高了催化稳定性。受益于LiCoO载体独特的电化学脱锂特性，在OER过程中Ru-O键的共价性得到有效调控。减弱的Ru-O共价键抑制了晶格氧参与催化反应，并确保了Ru活性位点的持续运行。此外，优化后的RuO/LiCoO催化剂中扩展的Ru-O键降低了*OOH中间体的形成能垒，加速了OER的进程。结果，RuO/LiCoO催化剂在0.5 M HSO中10 mA cm时仅需150±2 mV的过电位，并且在质子交换膜水电解中在1 A cm下稳定运行2000小时。这项工作为设计高效的钌基催化剂开辟了新途径。
