Relatively low conversion efficiency is the main limitation for realizing the conversion from CO2 photoreduction to high-value-added chemicals. Herein, we demonstrate that coupling alternating magnetic field (AMF) can significantly enhance the solar-catalyzed CO2 conversion process. Utilizing NiO / TiO2 as the experimental photocatalyst, CO2 could be reduced into CH4 with the participation of water vapor. The catalytic system presents a high activity that is improved by ∼200 % toward CH4 production through integrating with AMF. The applied AMF, on one hand, can increase the density of carries by restraining the combination of photogenerated electron-hole pairs. On the other hand, the applied AMF enhances the oxidizability of the catalysts with simulated solar irradiation to boost the oxidation of H2O to O2. Further, our examination illuminates that the Ni species serve as the adsorption/mobilization sites of CO2 to boost the conversion of CO2 to CH4 by photogenerated e − and the H + produced by H2O. This strategy paves a new path for boosting photocatalytic CO2 conversion by integrating AMF into the reaction.

中文翻译：

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通过光磁耦合促进二氧化碳光催化转化为太阳能燃料

相对较低的转化效率是实现CO2光还原向高附加值化学品转化的主要限制。在此，我们证明耦合交变磁场（AMF）可以显着增强太阳能催化的二氧化碳转化过程。利用NiO/TiO2作为实验光催化剂，在水蒸气的参与下，CO2可以被还原为CH4。该催化系统具有高活性，通过与 AMF 集成，CH4 生产活性提高了约 200%。一方面，所应用的AMF可以通过抑制光生电子-空穴对的结合来增加载流子密度。另一方面，所应用的AMF通过模拟太阳辐射增强了催化剂的氧化能力，以促进H2O氧化成O2。更远，我们的研究表明，Ni 物质作为 CO2 的吸附/移动位点，通过光生 e- 和 H2O 产生的 H + 促进 CO2 转化为 CH4。该策略通过将 AMF 集成到反应中，为促进光催化 CO2 转化开辟了一条新途径。