Utilization of CO₂ through the reverse water gas shift (RWGS) reaction is a promising solution in managing greenhouse gas emissions. Here, we used the RWGS reaction to evaluate the catalytic conversion of CO₂ over Ru-Fe nanoparticles supported on samarium-doped ceria (SDC) support. Catalysts of different Ru_xFe_100-x compositions (x = 100, 80, 45, 20, 0 at.%) have been studied under steady-state conditions in a packed bed reactor in the temperature range 300–800 °C to determine their catalytic activity and selectivity towards CO. The metal-support interaction (MSI) effect for SDC was evaluated to determine its promotional behavior for the RWGS reaction. The catalyst was characterized using TEM, TGA, and ICP-ES techniques. Among all investigated catalysts, Ru₄₅Fe₅₅/SDC (2 wt.%) displayed the overall best activity and CO selectivity. A stability test of 100 h at 650 °C confirmed an excellent stability of the Ru₄₅Fe₅₅/SDC catalyst. Overall, the use of Ru₄₅Fe₅₅/SDC (2 wt.%) is a promising catalyst in the utilization of CO₂, reaching a maximum CO yield of ∼47.5% at 800 °C and 100% CO selectivity above 500 °C. Furthermore, Ru₄₅Fe₅₅ (2 wt.%) nanoparticles were deposited on un-doped CeO₂ and doped ceria: Gd-CeO₂, Y₂O₃-CeO₂, as well as yttria-stabilized zirconia (YSZ) and carbon supports. Contrary to carbon support, all catalysts containing oxygen conducting-ceramic supports displayed 100% selectivity to CO at temperatures above 600 °C, which can be attributed to the synergistic relationship between Ru-Fe nanoparticles being promoted through the MSI and thermally induced migration of promoting ionic species (O^δ−) from oxygen conducting ceramics to the nanoparticles.

通过反向水煤气变换（RWGS）反应利用CO ₂是管理温室气体排放的有前途的解决方案。在这里，我们使用RWGS反应来评估CO ₂在eria掺杂二氧化铈（SDC）载体上负载的Ru-Fe纳米粒子上的催化转化。不同Ru _x Fe _100-x的催化剂在稳态条件下，在填充床反应器中，于300–800°C的温度范围内，对组成（x = 100、80、45、20、0 at。％）的化合物进行了研究，以确定它们的催化活性和对CO的选择性。评估了SDC的金属-载体相互作用（MSI）效应，以确定其对RWGS反应的促进行为。使用TEM，TGA和ICP-ES技术对催化剂进行了表征。在所有研究的催化剂中，Ru ₄₅ Fe ₅₅ / SDC（2 wt。％）显示出总体最佳活性和一氧化碳选择性。在650°C下100 h的稳定性测试证实了Ru ₄₅ Fe ₅₅ / SDC催化剂具有出色的稳定性。总体而言，使用Ru ₄₅ Fe ₅₅/ SDC（2 wt。％）是利用CO ₂的有前途的催化剂，在800°C时的最大CO收率达到〜47.5％，在500°C以上时CO的选择性达到100％。此外，Ru ₄₅ Fe ₅₅（2 wt。％）纳米颗粒沉积在未掺杂的CeO ₂和掺杂的二氧化铈：Gd-CeO ₂，Y ₂ O ₃ -CeO _2上以及氧化钇稳定的氧化锆（YSZ）和碳载体。与碳载体相反，所有含氧导电陶瓷载体的催化剂在高于600°C的温度下均表现出对CO的100％选择性，这可归因于通过MSI促进的Ru-Fe纳米颗粒与促进反应的热诱导迁移之间的协同关系。从导氧陶瓷到纳米粒子的离子物种（^Oδ-）。