2024年6月11日 · Here, the authors show that incorporating lanthanide elements into RuOx shields against external factors, enabling fine-tuned Ru-O covalency for durable oxygen evolution reaction...

由此产生的高度对称的八面体Ru-O-Co协同配位，具有强电子耦合效应，实现了直接双氧自由基耦合OER途径。 事实上，实验和理论计算都揭示了一种热力学上突破的非均相双原子氧机制。

2024年1月2日 · In this work, weakened covalency of Ru−O bond was tailored by introducing tensile strain to RuO 6 octahedrons in a binary Ru−Sn oxide matrix, prohibiting the participation of lattice oxygen and the dissolution of Ru, thereby significantly improving the long-term stability.

2025年1月18日 · In this study, we demonstrate distinct stabilities in Ru oxides during OER and provide direct evidence suggesting factors beyond lattice oxygen participation and Ru site over-oxidation...

2025年3月13日 · Here, we present a precise strategy to selectively activate the metal redox process while suppressing the undesired oxygen redox pathway by fine-tuning the Ru-O coordination number in amorphous RuOx. The optimized catalyst exhibits outstanding acidic OER performance, achieving a low overpotential of 215 mV at 10 mA cm-2 and maintaining ...

2 天之前 · Most notably, the Ru 0.8 Ir 0.2 O x exhibits outstanding industrial-scale performance in PEMWE, reaching 4.0 A cm −2 at 2 V and maintaining stability for >1000 h at 500 mA cm −2. This efficiency reduces hydrogen production costs to $0.88 kg −1. This work marks a transformative step forward in designing efficient, durable OER catalysts ...

二氧化钌 （RuO2） 在酸性析氧反应 （OER） 中的持续稳定性会因晶格氧 （LO） 和 OER 过程中的金属溶解而受到损害。 杂原子掺杂被认为是在酸性 OER 应用中提高 RuO2 稳定性的可行策略。 本研究提出了一种不易获得或失去电子 Ba2+ 的离子进入 RuO2 （Ba-RuO2） 纳米片 （NS） 催化剂，该催化剂增加了暴露活性位点的数量，实现了 10 mA/cm2 的电流密度，过电位仅为 229 mV，并维持该输出超过 250 小时。 根据密度泛函理论 （DFT） 和 X 射线吸收光谱，Ba 掺 …

4 天之前 · In situ Raman spectroscopy further reveals that the Ru-O bond interactions are significantly enhanced due to the regulation of the heterogeneous interface, which stabilizes Ru species dissolution at elevated potentials. Mass spectrometry analysis confirmed that lattice oxygen participation was inhibited, contributing to improvements in the ...

Most notably, the Ru 0.8 Ir 0.2 O x exhibits outstanding industrial-scale performance in PEMWE, reaching 4.0 A cm-2 at 2 V and maintaining stability for >1000 h at 500 mA cm-2. This efficiency reduces hydrogen production costs to $0.88 kg-1. This work marks a transformative step forward in designing efficient, durable OER catalysts, offering a ...

Ruthenium dioxide (RuO 2) is one of the most promising acidic oxygen evolution reaction (OER) catalysts to replace the expensive and prevalent iridium (Ir)-based materials. However, the lattice oxygen oxidation induced Ru dissolution during OER compromises the activity and stability.