Reverse water gas shift (RWGS) is a promising green approach for CO₂ capture and utilisation, which is able to valorise CO₂ by reducing it to CO using hydrogen obtained via renewable electricity. Five different copper-based catalysts were synthesized – 10 wt. % Cu/M (M = Al₂O₃/CeO₂/TiO₂/SiO₂/ZrO₂). The catalysts were tested for activity under different conditions (pressure of 3–7 bars, temperature of 280–360 °C, 0.67–1.5 H₂/CO₂ reagent ratio and the gas flow rates in the range of 0.005–0.04 g/min). Cu/Al₂O₃ and Cu/CeO₂ were the most active and reached near-equilibrium conversions at 360 °C. SEM, EDX, BET, XRD, XPS, HgP, H₂ TPR, H₂ TPD and N₂O PSO techniques were used to characterise the catalysts. The present study is the first to demonstrate an unprecedented degree of linking the activity measurements, material surface-structure and mathematical modelling of mass transport phenomena coupled with copper microkinetics for the case of CO₂ reduction.

反向水煤气变换（RWGS）是一种用于CO ₂捕集和利用的有前途的绿色方法，它能够通过使用可再生电力获得的氢气将CO ₂还原为CO来使CO ₂增值。合成了五种不同的铜基催化剂– 10 wt。％Cu / M（M ＝ Al ₂ O ₃ / CeO ₂ / TiO ₂ / SiO ₂ / ZrO ₂）。测试了催化剂在不同条件下的活性（压力为3-7 bar，温度为280-360°C，试剂比为0.67-1.5 H ₂ / CO ₂，气体流速为0.005-0.04 g / min ）。Cu / Al ₂ O ₃和Cu / CeO_2个是最活跃的，在360°C时达到了接近平衡的转化率。SEM，EDX，BET，XRD，XPS，HgP，H ₂ TPR，H ₂ TPD和N ₂ O PSO技术用于表征催化剂。本研究首次证明了在降低CO ₂的情况下，将活性测量，材料表面结构和质量传输现象与铜微动力学相结合的数学模型之间的联系达到了前所未有的程度。