等离子体催化为环境条件下CO 2加氢生成甲醇提供了灵活且分散的解决方案,避免了热催化所需的高温和高压。然而,反应机制,特别是等离子体辅助表面反应仍不清楚,限制了选择性甲醇合成有效催化剂的开发。在这里,我们报道了一种双金属Ni-Co催化剂,可在35°C和0.1 MPa下有效地等离子体催化CO 2加氢生成甲醇,实现46%的甲醇选择性和24%的CO 2转化率。原位等离子体耦合傅里叶变换红外表征以及密度泛函理论计算揭示了工程双金属位点作为甲醇合成的主要活性中心,通过减少空间位阻促进氢自由基诱导反应途径中的速率决定步骤影响。这项工作证明了双金属催化剂在环境条件下等离子催化CO 2加氢生成甲醇方面的巨大潜力,代表着朝着可持续CO 2转化和燃料生产迈出的重要一步。
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Engineering Ni-Co bimetallic interfaces for ambient plasma-catalytic CO2 hydrogenation to methanol
Plasma catalysis offers a flexible and decentralized solution for CO2 hydrogenation to methanol under ambient conditions, avoiding the high temperatures and pressures required for thermal catalysis. However, the reaction mechanism, particularly plasma-assisted surface reactions, remains unclear, limiting the development of efficient catalysts for selective methanol synthesis. Here, we report a bimetallic Ni-Co catalyst effective in plasma-catalytic CO2 hydrogenation to methanol at 35°C and 0.1 MPa, achieving 46% methanol selectivity and 24% CO2 conversion. In situ plasma-coupled Fourier transform infrared characterization, along with density functional theory calculations, reveals that the engineered bimetallic sites act as primary active centers for methanol synthesis, promoting the rate-determining step in H-radical-induced reaction pathways by reducing steric hindrance effects. This work demonstrates the significant potential of bimetallic catalysts in plasma-catalytic CO2 hydrogenation to methanol under ambient conditions, representing a major step toward sustainable CO2 conversion and fuel production.