Scholarlink

<p>Dynamically tracking the variations in electronic configurations and molecular binding of a catalyst under operando conditions remains a significant challenge. Herein, we report an in-situ millisecond-resolved wide-angle X-ray scattering technique to capture lattice distortion within a catalyst in low-temperature oxidation under electric- and thermal-induced catalysis and reveal the intrinsic mechanism of metal-O bonding on oxygen activation and the electro promotion. The <i>c</i>-directional lattice spacing of MnO<sub>2</sub> loaded on Ni foam is observed to undergo contraction and recovery processes with and without a direct electric field, respectively. Hard and soft X-ray absorption fine structure spectra, density functional theory and temperature-programmed reduction analyses confirm that an external current can effectively modulate the electronic configuration of manganese and oxygen atoms in the MnO<sub>2</sub> catalyst and alter the covalent bonding between Mn and O atoms by weakening the Mn-O bond, thereby enhancing the activity of lattice oxygen in the catalyst. This study provides scientific insights into the dynamic evolution of lattice distortion in externally field-induced catalytic reactions.</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

Dynamic variations of metal-O bonding in electro- and thermo-catalytic activation processes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月15日

查看全文
  • Ronghui Zhu,
  • Shunzheng Zhao,
  • Kai Chen,
  • Qingjun Yu,
  • Fengyu Gao,
  • Guang Mo,
  • Yunpeng Liu,
  • Shaobin Wang,
  • Honghong Yi,
  • Xiaolong Tang

摘要

Dynamically tracking the variations in electronic configurations and molecular binding of a catalyst under operando conditions remains a significant challenge. Herein, we report an in-situ millisecond-resolved wide-angle X-ray scattering technique to capture lattice distortion within a catalyst in low-temperature oxidation under electric- and thermal-induced catalysis and reveal the intrinsic mechanism of metal-O bonding on oxygen activation and the electro promotion. The c-directional lattice spacing of MnO2 loaded on Ni foam is observed to undergo contraction and recovery processes with and without a direct electric field, respectively. Hard and soft X-ray absorption fine structure spectra, density functional theory and temperature-programmed reduction analyses confirm that an external current can effectively modulate the electronic configuration of manganese and oxygen atoms in the MnO2 catalyst and alter the covalent bonding between Mn and O atoms by weakening the Mn-O bond, thereby enhancing the activity of lattice oxygen in the catalyst. This study provides scientific insights into the dynamic evolution of lattice distortion in externally field-induced catalytic reactions.