近日，研究生陈晓霞在Small上发表题为“Modulating the Ruthenium-Cobalt Active Pair with Moderate Spacing for Enhanced Acidic Water Oxidation”的学术论文，导师为苏徽教授等。

论文摘要：Ruthenium (Ru)-based catalysts have emerged as promising alternatives toIridium (Ir) catalysts in proton exchange membrane water electrolysis cellsdue to their lower price and excellent oxygen evolution reaction (OER) activity.However, their stability is compromised by generation of unstablehigh-valence Ru sites and oxygen vacancy in a lattice oxygen-mediated (LOM)pathway. Here, a low-load Ru site on a Barium (Ba)-doped Co 3 O4(RuBa x Co 3–x O4 ) catalyst is developed with abundant Ruthenium─Cobalt(Ru─Co) pairs for enhanced acidic OER activity. The incorporation of Ba canefficiently modulate the lattice of Co 3 O4 , creating Ru─Co active pairs withoptimized spacing through compression stress. In situ characterizationsexhibit contractive Ru─Co pairs that promote the rapid and direct coupling of* O─O* radicals, bypassing the sluggish * OOH species and avoiding theoxygen vacancies, which can trigger the oxide path mechanism (OPM) for anefficient and stable OER process. As a result, the designed catalyst delivers alow overpotential of 219 mV to achieve a current density of 10 mA cm−2 , andalso demonstrates excellent stability, maintaining performance over 50 h ofcontinuous operation at a larger current density of 50 mA cm−2 . Thesefindings highlight the potential of the RuBa x Co 3-x O4 catalysts for durable andefficient OER applications.

论文链接：https://onlinelibrary.wiley.com/doi/10.1002/smll.202409173