biostudies-literatureHu YScience and Technology Commission of Shanghai MunicipalityShanghai Engineering Research Center of Green Remanufacture of Metal PartsNational Natural Science Foundation of China5430https://www.ebi.ac.uk/biostudies/studies/S-EPMC10420131biostudies-literatureUnknown16(15)Ni/CaO, a low-cost dual-functional material (DFM), has been widely studied for integrated CO₂ capture and hydrogenation. The core of this dual-functional material should possess both good CO₂ capture-conversion performance and structural stability. Here, we synthesized Ni/CaO DFMs modified with alkali metals (Na, K, and Li) through a combination of precipitation and combustion methods. It was found that Na-modified Ni/CaO (Na-Ni/CaO) DFM offered stable CO₂ capture-conversion activity over 20 cycles, with a high CO₂ capture capacity of 10.8 mmol/g and a high CO₂ conversion rate of 60.5% at the same temperature of 650 °C. The enhanced CO₂ capture capacity was attributed to the improved surface basicity of Na-Ni/CaO. In additioMaterials (Basel, Switzerland)The Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO₂ Capture and Hydrogenation.PMC10420131No. 5157416321DZ120890019DZ2252900Zou XSheng YHu YLu XXu QWang XCheng HfalseThe Effect of Alkali Metals (Li, Na, and K) on Ni/CaO Dual-Functional Materials for Integrated CO₂ Capture and Hydrogenation.Ni/CaO, a low-cost dual-functional material (DFM), has been widely studied for integrated CO₂ capture and hydrogenation. The core of this dual-functional material should possess both good CO₂ capture-conversion performance and structural stability. Here, we synthesized Ni/CaO DFMs modified with alkali metals (Na, K, and Li) through a combination of precipitation and combustion methods. It was found that Na-modified Ni/CaO (Na-Ni/CaO) DFM offered stable CO₂ capture-conversion activity over 20 cycles, with a high CO₂ capture capacity of 10.8 mmol/g and a high CO₂ conversion rate of 60.5% at the same temperature of 650 °C. The enhanced CO₂ capture capacity was attributed to the improved surface basicity of Na-Ni/CaO. In additio2023-01-01T00:00:00Z2023 Aug2025-04-04T19:47:11.717Z2025-04-04T19:47:11.717ZS-EPMC104201313757013410.3390/ma16155430