Park, Kwangho Lee, Kyung Rok Ahn, Sunghee Kim, Seong-Hoon Haider, Arsalan Choung, Seokhyun Han, Jeong Woo Jung, Kwang-Deog 2024-01-19T08:32:23Z 2024-01-19T08:32:23Z 2023-09-07 2023-10 0926-3373 https://pubs.kist.re.kr/handle/201004/113222 A single atom Ru catalyst supported on a N-doped TiO2 was investigated for the conversion of CO2 to formate by hydrogenation. N-dopant sites induced a strong binding environment to Ru single-atom catalysts (SACs), resulting in a stable and atomically isolated dispersion state of Ru SACs upon metalation. Consequently, Ru/MN-TiO2 exhibited enhanced catalytic stability, which incorporated both substitutional (Ns) and interstitial (Ni) dopant sites, retaining 42 % of its original relative activity after the fifth recycle test. In contrast, Ru/N-TiO2, which contained only Ni-dopants, showed a lower stability, retaining only 19 % of its initial activity after the fifth run, and Ru/TiO2 was fully deactivated after the third run. Density functional theory calculations revealed that the stronger binding ability of the Ns sites to the Ru species compared with that of the Ni sites and the bare surface of the TiO2 structure improved the catalytic stability during hydrogenation. English Elsevier BV Structural effects of nitrogen-doped titanium oxide supports on stabilization of ruthenium active species in carbon dioxide hydrogenation to formate Article 10.1016/j.apcatb.2023.122873 1 Applied Catalysis B: Environmental, v.335 Applied Catalysis B: Environmental 335 Y scie scopus 001053120100001 2-s2.0-85159474446 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article HIGHLY EFFICIENT CONVERSION FORMIC-ACID CO2 HYDROGENATION CATALYTIC-HYDROGENATION TIO2 OXIDATION METHANOL ENERGY CO2 hydrogenation Formic acid synthesis Heterogeneous catalyst H2 storage N-doped titanium oxide