Park, Dahee Hong, Seunghwa Han, Jaebeom Kim, Yongjoo Park, Minhee Lee, Byunghyun Song, Yejin Koo, Hye Young Yang, Sangsun Lee, Won Bo Park, Jeong Young 2025-03-22T15:30:06Z 2025-03-22T15:30:06Z 2025-03-19 2025-05 0926-3373 https://pubs.kist.re.kr/handle/201004/152041 Single-atom catalysts are extensively researched for their superior catalytic performance owing to their atomiclevel active sites. Challenges associated with controlling single atoms have led to numerous attempts to develop efficient synthesis methods. Herein, we highlight a straightforward single-atom catalyst synthesis approach based on aerosol-assisted spray pyrolysis. We dispersed single-atom metals (Pt, Co, and Ni) on mesoporous defective CeO2 and employed the prepared catalysts for CO2 hydrogenation. We also prepared dual single-atom catalysts (Pt/Co and Pt/Ni), which exhibit dual-metal synergy owing to electronic metal-metal interactions. In these systems, CeO2 acts as the support, while the dual single-atom metals serve as active sites. We investigated the atomic-defect properties of catalytic sites and evaluated the catalytic performance for CO2 conversion, CO selectivity, and long-term stability based on the metal species. We particularly focused on surface deformation and synergistic effects arising from the incorporation of dual single-atoms. Our findings revealed that the atomicdefect properties of CeO2 and the pathways for CO2 and H2 activation are governed by the electronic metal-support interaction of the single-atom metal to CeO2 in the single-atom catalysts, and to the synergy between Pt and the transition metal as an electronic metal-metal interactions in the dual single-atom catalysts. Importantly, these critical outcomes were achieved via a one-step synthesis approach, highlighting the advancement of atomic-controlled catalysts, including single-atom and dual single-atom catalysts. English Elsevier BV Insights into the synergy effect in dual single-atom catalysts on defective CeO2 under CO2 hydrogenation Article 10.1016/j.apcatb.2024.124987 1 Applied Catalysis B: Environment and Energy, v.365 Applied Catalysis B: Environment and Energy 365 N scie scopus 001411997600001 2-s2.0-85213291069 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article SPRAY-PYROLYSIS PROCESS METAL-OXIDE INTERFACES LOW-TEMPERATURE OXIDATION SURFACE STABILITY MECHANISM DROPLET SPECTRA DESIGN Single-atom catalysts Dual single-atom catalysts Atomic defects CO 2 hydrogenation Electronic metal-support interaction Electronic metal-metal interaction