Scholarlink

<p>Developing ruthenium-based catalysts with high activity and long-term stability is crucial for sustaining efficient oxygen evolution reactions (OER) under acidic conditions. Here, we develop a ruthenium-titanium-tin oxide (RuO<sub>2</sub>/TiSnO<sub>x</sub>) electrocatalyst featuring a rationally engineered ternary heterostructure composed of RuO<sub>2</sub>, TiO<sub>2</sub>, and SnO<sub>2</sub> phases with well-defined interfaces. Such a unique architecture establishes a multidirectional electron transport network, which accelerates electron delivery to Ru active sites and mitigates local charge accumulation, thereby suppressing overoxidation and dissolution of Ru under acidic conditions. Structural and spectroscopic characterizations confirm the formation of coherent heterointerfaces, which reconstruct the coordination environment of Ru, thereby favoring optimal adsorption of OER intermediates. Benefiting from synergistic effects, the RuO<sub>2</sub>/TiSnO<sub><i>x</i></sub> catalyst achieves a remarkably low overpotential of 187 mV at 10 mA/cm<sup>2</sup> in 0.5 mol/L H<sub>2</sub>SO<sub>4</sub> and maintains stable operation for 500 h, outperforming most previous Ru-based catalysts. This study demonstrates that ternary heterostructure engineering provides an effective pathway to balance activity and stability in Ru-based acidic OER catalysts, advancing the practical application in proton exchange membrane water electrolysis (PEMWE) systems for green hydrogen production.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Accelerating Electron Transfer via Ternary Heterostructures for Enhanced Acidic Oxygen Evolution Performance

  • 期刊论文

  • 发表日期：

    2026年1月29日

查看全文
  • Peizhi Yang,
  • Liming Deng,
  • Luqi Wang,
  • Sheng Zhao,
  • Linlin Li,
  • Shengjie Peng

摘要

Developing ruthenium-based catalysts with high activity and long-term stability is crucial for sustaining efficient oxygen evolution reactions (OER) under acidic conditions. Here, we develop a ruthenium-titanium-tin oxide (RuO2/TiSnOx) electrocatalyst featuring a rationally engineered ternary heterostructure composed of RuO2, TiO2, and SnO2 phases with well-defined interfaces. Such a unique architecture establishes a multidirectional electron transport network, which accelerates electron delivery to Ru active sites and mitigates local charge accumulation, thereby suppressing overoxidation and dissolution of Ru under acidic conditions. Structural and spectroscopic characterizations confirm the formation of coherent heterointerfaces, which reconstruct the coordination environment of Ru, thereby favoring optimal adsorption of OER intermediates. Benefiting from synergistic effects, the RuO2/TiSnOx catalyst achieves a remarkably low overpotential of 187 mV at 10 mA/cm2 in 0.5 mol/L H2SO4 and maintains stable operation for 500 h, outperforming most previous Ru-based catalysts. This study demonstrates that ternary heterostructure engineering provides an effective pathway to balance activity and stability in Ru-based acidic OER catalysts, advancing the practical application in proton exchange membrane water electrolysis (PEMWE) systems for green hydrogen production.