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<p>Translating atomic-scale insights from surface science studies of model catalysts to practical powder catalysts remains a persistent challenge in heterogeneous catalysis. Here we demonstrate mechanistic continuity across the pressure and materials gaps during CO oxidation at the FeO–Pt interface using in situ microscopy, spectroscopy and computational modelling. Under reaction conditions, coordinatively unsaturated Fe (Fe<sub>cus</sub>) sites at the interface enable selective O<sub>2</sub> activation on CO-saturated surfaces, circumventing the CO-poisoning limitation of platinum-group metals. We identify parallel reaction pathways involving the *O<sub>2</sub>–*CO intermediate. Remarkably, activation energies remain consistent at 12–15 kJ mol<sup>−1</sup> (0.12–0.16 eV) from ultrahigh vacuum to atmospheric pressures and from FeO/Pt(111) model catalysts to FeO/Pt powder catalysts, validating mechanistic insights derived from surface science studies. Our findings show an example of bridging the long-standing divide between model and practical catalyst systems, establishing an effective approach to capture catalytic behaviours under operational conditions and advancing mechanism-driven catalyst design.</p><p></p>

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Continuity of reaction kinetics across the pressure and materials gaps in CO oxidation on FeO–Pt interfaces

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Weipeng Shao,
  • Yanxiao Ning,
  • Wenjie Liao,
  • Xin Yu,
  • Bowen Zhu,
  • Yun Liu,
  • Yi Zhang,
  • Liang Yu,
  • Qingfei Liu,
  • Hao Chen,
  • Lunjia Zhang,
  • Weiwen Meng,
  • Xuan Wang,
  • Mingshu Chen,
  • Qiang Fu,
  • Ping Liu,
  • Fan Yang,
  • Xinhe Bao

摘要

Translating atomic-scale insights from surface science studies of model catalysts to practical powder catalysts remains a persistent challenge in heterogeneous catalysis. Here we demonstrate mechanistic continuity across the pressure and materials gaps during CO oxidation at the FeO–Pt interface using in situ microscopy, spectroscopy and computational modelling. Under reaction conditions, coordinatively unsaturated Fe (Fecus) sites at the interface enable selective O2 activation on CO-saturated surfaces, circumventing the CO-poisoning limitation of platinum-group metals. We identify parallel reaction pathways involving the *O2–*CO intermediate. Remarkably, activation energies remain consistent at 12–15 kJ mol−1 (0.12–0.16 eV) from ultrahigh vacuum to atmospheric pressures and from FeO/Pt(111) model catalysts to FeO/Pt powder catalysts, validating mechanistic insights derived from surface science studies. Our findings show an example of bridging the long-standing divide between model and practical catalyst systems, establishing an effective approach to capture catalytic behaviours under operational conditions and advancing mechanism-driven catalyst design.