A photothermal catalytic system comprising Cu/CeO₂ was applied to the reaction between NO, CO and H₂O for the production of NH₃ under visible-light irradiation. High NO conversion (94.4%) and NH₃ selectivity (66.5%) were achieved over Cu/CeO₂ in the presence of H₂O at 210 °C. Visible light further improved the conversion of NO (97.7%) and selectivity for NH₃ (69.1%). The quasi-situ EPR and in-situ DRIFTS results indicated that CO initially reacts with H₂O to form an HCO₃* intermediate, which then decomposes into CO₂ and activated H*. Finally, NO reacts with activated H* to produce NH₃. The localized surface plasmon resonance effect of Cu nanoparticles induced by visible light promotes the decomposition of HCO₃* to CO₂ and H*, while regenerating oxygen vacancies (OVs, H₂O activation sites) at the CeO₂ sites, resulting in enhanced NH₃ production. This study offers a convenient approach for NH₃ production under mild conditions.

_{将Cu/CeO 2}光热催化体系应用于可见光照射下NO、CO和H ₂ O反应生成NH _{3 。}在 210 °C的 H ₂ O存在下，与 Cu/CeO ₂相比，实现了高 NO 转化率 (94.4%) 和 NH _{3选择性 (66.5%)。}可见光进一步提高了NO的转化率(97.7%)和NH ₃的选择性(69.1%)。准原位EPR和原位DRIFTS结果表明CO最初与H ₂ O反应形成HCO ₃ *中间体，然后分解为CO ₂并激活H*。最后，NO与活化的H*反应生成NH ₃ 。_{可见光诱导的Cu纳米颗粒的局域表面等离子体共振效应促进HCO 3 *}分解为CO ₂和H*，同时在CeO ₂位点再生氧空位（OV、H ₂ O活化位点） ，从而增强NH ₃生产。本研究为在温和条件下生产NH ₃提供了一种便捷的方法。