Scholarlink

<p>Integrated CO<sub>2</sub> capture and conversion (iCCC) technology is promising for carbon neutrality, but the high-temperature deactivation of dual-functional materials (DFMs) limits its practicality. Herein, we develop adaptive metallic nano-catalysts via in-situ exsolution-dissolution in perovskite-based DFMs, enabling self-adjustment during cyclic CO<sub>2</sub>/CH<sub>4</sub> redox switching. Al-doping induces the Jahn-Teller distortion in LaNiO<sub>3</sub> perovskite, making the lattice contracted to enrich Ni<sup>2+</sup> and oxygen vacancies; thereby tailoring the smooth exsolution-dissolution of Ni nano-catalyst and creating fast O<sup>2-</sup> migration channels for facilitating CO<sub>2</sub> adsorption. The optimized perovskite LaNi<sub>0.8</sub>Al<sub>0.2</sub>O<sub>3</sub>/CaO exhibits exceptional durability over 50 cycles, achieving a high CO<sub>2</sub> capture capacity of 10.2 mmol g<sub>DFM</sub><sup>−1</sup> and both high conversions of 91.5% for CO<sub>2</sub> and 93.5% for CH<sub>4</sub>. The mechanism study by the in-situ characterizations and surface energy calculations confirms that heteroatomic doping modulates the metal-support interactions, providing a solution for the long-sought deactivation problems of sintering and coking.</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

Self-adaptive Ni nanoparticles in perovskite LaNi1-xAlxO3/CaO for durable CO2 capture and in-situ conversion

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月21日

查看全文
  • Bin Shao,
  • Zhonghao Jia,
  • Sheng Dai,
  • Jun Hu

摘要

Integrated CO2 capture and conversion (iCCC) technology is promising for carbon neutrality, but the high-temperature deactivation of dual-functional materials (DFMs) limits its practicality. Herein, we develop adaptive metallic nano-catalysts via in-situ exsolution-dissolution in perovskite-based DFMs, enabling self-adjustment during cyclic CO2/CH4 redox switching. Al-doping induces the Jahn-Teller distortion in LaNiO3 perovskite, making the lattice contracted to enrich Ni2+ and oxygen vacancies; thereby tailoring the smooth exsolution-dissolution of Ni nano-catalyst and creating fast O2- migration channels for facilitating CO2 adsorption. The optimized perovskite LaNi0.8Al0.2O3/CaO exhibits exceptional durability over 50 cycles, achieving a high CO2 capture capacity of 10.2 mmol gDFM−1 and both high conversions of 91.5% for CO2 and 93.5% for CH4. The mechanism study by the in-situ characterizations and surface energy calculations confirms that heteroatomic doping modulates the metal-support interactions, providing a solution for the long-sought deactivation problems of sintering and coking.