A systematic investigation on the performance of fixed‐bed and monolithic reactors for dynamic photoinduced CO₂ reduction with CH₄ via dry and bi‐reforming of methane over La‐modified TiO₂ nanocatalyst under UV light is conducted. La/TiO₂ is synthesized using a modified sol–gel method, and the monolithic‐coated catalyst is synthesized using a dip‐coating method. The performance of La/TiO₂ is tested for different reforming systems in both types of photoreactors. The results reveal 5 wt% La/TiO₂ effectively promotes CO₂ and CH₄ conversion to CO, H₂, and C₂H₆, whereas catalyst performance is greatly enhanced in the presence of H₂O in both types of reactors via bireforming of methane (BRM). Lower temperature is favorable for CO production, whereas H₂ and C₂H₆ yields are enhanced at higher temperature. Notably, the monolith photoreactor is favorable for enhanced CO and H₂ yields. More interestingly, quantum yield (QY) for H₂ in BRM using monolith photoreactor is 1.402%—an increment of almost 4.99‐fold than dry reforming of methane (DRM). This can be attributed to enhanced CO₂ adsorption with hindered charge recombination by La, appropriate redox potentials, larger illuminated surface area, and higher photon flux. The prolonged La/TiO₂ activity in a monolith photoreactor for enhanced CO and H₂ production signifies its potential for CO₂ conversion applications.

中文翻译：

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在固定床和整体反应器中，La改性的TiO2上的甲烷光诱导干燥和重整为燃料。

上的性能的一种系统的调查式固定床和动态反应器的单片CO光敏反应₂用CH还原₄通过干和双向重整甲烷La掺杂改性的TiO ₂在UV光下纳米催化剂下进行。La / TiO ₂是使用改进的溶胶-凝胶法合成的，而整体涂覆的催化剂是使用浸涂法合成的。在两种类型的光反应器中，针对不同的重整系统测试了La / TiO ₂的性能。结果表明5wt％的La / TiO ₂有效地促进了CO ₂和CH ₄转化为CO，H ₂和C ₂ H _6。，而催化剂性能在H的存在大大增强了₂ ö在两种类型的反应器通过甲烷（BRM）的bireforming。较低的温度有利于CO的生产，而较高的温度可提高H ₂和C ₂ H _6的产率。值得注意的是，整体式光反应器有利于提高CO和H _2的产率。更有趣的是，使用整体式光反应器的BRM中H _2的量子产率（QY）为1.402％，比甲烷干重整（DRM）增长了近4.99倍。这可以归因于增强的CO ₂吸附，La阻碍了电荷重组，合适的氧化还原电势，更大的被照表面积和更高的光子通量。整体式光反应器中延长的La / TiO ₂活性可增强CO和H _2的产生，表明其在CO ₂转化应用中的潜力。