Strong metal-support interactions (SMSIs) have attracted increasing attention due to their geometric and electronic effects in improving catalytic performance. For the first time, an SMSI phenomenon between Ni and BaCO₃ was discovered. We observed the migration of BaCO₃ support onto metallic nickel nanoparticles following H₂ reduction and CO₂ hydrogenation. The resulting porous overlayer not only stabilized nickel nanoparticles from sintering but also increased the number of Ni-BaCO₃ sites. The abundant Ni-BaCO₃ sites significantly promote the adsorption and activation of CO₂. We also found that both the hydrogen atmosphere and metallic nickel nanoparticles boost the decomposition of BaCO₃, followed by its regeneration in a CO₂ atmosphere. Furthermore, the CO₂ hydrogenation atmosphere enables the sustainable decomposition-regeneration of BaCO₃, remarkedly increasing the CO₂ concentration at the Ni-BaCO₃ interface. Ultimately, the promoted CO₂ activation and localized CO₂ enrichment at the Ni-BaCO₃ interface collectively facilitate the CO₂ hydrogenation reaction.

中文翻译：

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通过 Ni 和 BaCO3 之间的强金属载体相互作用促进 CO2 加氢


强金属-载体相互作用 （SMSI） 因其在提高催化性能方面的几何和电子效应而引起了越来越多的关注。首次发现了 Ni 和 BaCO₃ 之间的 SMSI 现象。我们观察到 H₂ 还原和 CO₂ 氢化后 BaCO₃ 载体迁移到金属镍纳米颗粒上。由此产生的多孔覆盖层不仅稳定了烧结中的镍纳米颗粒，还增加了 Ni-BaCO₃ 位点的数量。丰富的 Ni-BaCO₃ 位点显著促进 CO₂ 的吸附和活化。我们还发现，氢气氛和金属镍纳米颗粒都促进了 BaCO₃ 的分解，然后使其在 CO₂ 气氛中再生。此外，CO₂ 加氢气氛使 BaCO₃ 能够可持续分解-再生，显着增加了 Ni-BaCO₃ 界面处的 CO₂ 浓度。最终，促进的 CO₂ 活化和 Ni-BaCO₃ 界面的局部 CO₂ 富集共同促进了 CO₂ 氢化反应。