Jang, Munjeong Choi, Subin Kim, Yoondo Cha, Junyoung Kim, Ah-Reum Jeong, Hyangsoo Kim, Yongmin Choi, Sun Hee Nam, Suk Woo Lim, Jongwoo Yoon, Chang Won Sohn, Hyuntae 2024-01-19T09:03:22Z 2024-01-19T09:03:22Z 2023-06-01 2023-08 0169-4332 https://pubs.kist.re.kr/handle/201004/113467 A highly reducible CeO2 surface was prepared on a SiO2 support to investigate the effect of redox properties of CeO2 on the catalytic activity of Pt/CeO2-SiO2 for MCH dehydrogenation. Characterization of the Pt/CeO2-SiO2 catalyst revealed a significantly higher Pt dispersion than Pt/micro-sized CeO2 and Pt/SiO2. The well-dispersed Pt particles averaging 1.1 nm in size (Pt/CeO2-SiO2) were primarily attributed to the high surface concentration of oxygen vacancies, which provided abundant defect sites that stabilized the Pt particles from sintering. Hydrogen released from MCH dehydrogenation was approximately 5-6 times greater with high selectivity to-wards toluene products for Pt/CeO2-SiO2 compared to its counterparts. The excellent catalytic activity of Pt/ CeO2-SiO2 was attributed to the presence of rich oxygen vacancies on the CeO2 surface, which was significantly reduced under MCH dehydrogenation conditions, resulting in faster toluene desorption. English Elsevier BV Effect of CeO2 redox properties on the catalytic activity of Pt-CeOx over irreducible SiO2 support for methylcyclohexane (MCH) dehydrogenation Article 10.1016/j.apsusc.2023.157134 1 Applied Surface Science, v.627 Applied Surface Science 627 Y scie scopus 000984745900001 2-s2.0-85153118652 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article OXYGEN VACANCIES RAMAN-SPECTROSCOPY HYDROGEN CERIA CO IDENTIFICATION PERFORMANCE STABILITY OXIDATION EFFICIENT Liquid organic hydrogen carriers (LOHC) Dehydrogenation CeO2-dopedSiO2 Ceria Methylcyclohexane (MCH)