In this work, we introduce HI-Light, a surface-engineered glass-waveguide-based “shell-and-tube” type photothermal reactor which is both scalable in diameter and length. We examine the effect of temperature, light irradiation, and residence time on its photo-thermocatalytic performance for CO₂ hydrogenation to form CO, with a cubic phase defect-laden indium oxide, In2O3-x(OH)y, catalyst. We demonstrate the light enhancement effect under a variety of reaction conditions. Notably, the light-on performance for the cubic nanocrystal photocatalyst exhibits a CO evolution rate at 15.40 mmol g_cat⁻¹ hr⁻¹ at 300°C and atmospheric pressure. This is 20 times higher conversion rate per unit catalyst mass per unit time beyond previously reported In2O3-x(OH)y catalyst in the cubic form under comparable operation conditions and more than 5 times higher than that of its rhombohedral polymorph. This result underscores that improvement in photo-thermocatalytic reactor design enables uniform light distribution and better reactant/catalyst mixing, thus significantly improving catalyst utilization.

在这项工作中，我们将介绍HI-Light，这是一种基于表面工程设计的基于玻璃波导的“管壳式”光热反应器，其直径和长度均可扩展。我们研究了温度，光照射和停留时间对其对光热催化性能的影响，该光热催化性能是使用立方相负载有氧化铟In2O3-x（OH）y的催化剂进行的CO ₂加氢形成CO的。我们证明了在各种反应条件下的光增强作用。值得注意的是，立方纳米晶体光催化剂的开光性能在15.40 mmol g _cat ^-1 hr ^-1时表现出CO释放速率。在300°C和大气压下。在可比的操作条件下，这比立方形式的In2O3-x（OH）y催化剂每单位时间每单位催化剂质量的转化率高20倍，比其菱形多晶型多5倍以上。该结果强调，光热催化反应器设计的改进能够实现均匀的光分布和更好的反应物/催化剂混合，从而显着提高了催化剂的利用率。