摘要
The development of efficient catalysts for carbon dioxide (CO₂) to carbon monoxide (CO) conversion via the reverse water-gas shift (RWGS) reaction is crucial for sustainable carbon utilization and mitigating environmental challenges. In this study, we present a strategically designed ternary catalyst with abundant active Cu2O-NiO-Pd interfaces (denoted as CNP-1005) via controlling the Ni:Pd ratio of 1.0:0.5 for enhanced CO production. The CNP-1005 catalyst initiates CO production at 150°C and achieves a high CO production yield of 3149 μmol g−1 at 300°C, demonstrating superior catalytic efficiency. Most importantly, the CNP-1005 catalyst retains its 100 % efficiency (i.e., delivers constant CO production yield) up to 150 thermal cycles (225 h). Furthermore, a hierarchical structured Cu2O-NiO-Pd catalyst (denoted as CNP-0510) with an inverse Ni:Pd ratio of 0.5:1.0 was synthesized, exhibiting a 43 % reduction in CO production yield (1350 μmol g−1) compared to CNP-1005, highlighting the significance of interfacial synergy. The results of in-situ X-ray absorption spectroscopy at Ni and Cu K-edges reveal that the high CO2-to CO conversion yield on the surface of CNP-1005 is attributed to the enhanced activation of CO₂ at the Cu2O-NiO-Pd interfaces, facilitating the RWGS pathway. This work provides valuable insights into the design of multicomponent catalytic systems, offering a promising strategy for CO₂ valorization and sustainable carbon recycling at low temperatures.
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•Cu₂O–NiO–Pd interfaces boost low-temperature CO₂-to-CO conversion.•Optimized Ni:Pd ratio (1.0:0.5) enhances RWGS activity and stability.•In-situ XAS reveals interfacial synergy driving efficient CO₂ activation.