Ridwan, Muhammad Dwiatmoko, Adid Adep Ha, Jeong-Myeong Yoon, Chang Won 2024-01-19T08:01:44Z 2024-01-19T08:01:44Z 2023-09-14 2024-01 0920-5861 https://pubs.kist.re.kr/handle/201004/112987 To assess the influence of catalyst morphology and dopant on catalytic activity for the hydrodeoxygenation (HDO) of guaiacol, four Ru catalysts-Ru(2 wt%)/CeO2 irregular nanoparticles (Ru-1), Ru(2 wt%)/CeO2 nanocubes (Ru-2), Ru(2 wt%)/Ce0.88Pr0.12O2-& delta; nanocubes (Ru-3) and Ru(2 wt%)/Ce0.75Pr0.25O2-& delta; nanocubes (Ru-4) were prepared and characterized using transmission electron microscopy, X-ray diffraction analysis, Raman spectroscopy, hydrogen temperature-programmed reduction, X-ray photoelectron spectroscopy, and volumetric oxygen titration. The shape-dependent catalytic activities for the HDO of guaiacol over Ru-1 and Ru2 were initially determined, presenting that Ru-2 exhibited higher activity than Ru-1. In addition, the effect of Pr doping into CeO2 on the desired activity was examined using Ru-2, Ru-3 and Ru-4, demonstrating that there is an optimal Pr content that maximizes the activity. The results obtained by the analytical methods with additional oxygen vacancy titration indicate that the activities of the catalysts are strongly correlated with the normalized oxygen vacancy densities. English Elsevier BV Nanostructured Ru(2 wt%)/PrxCe1-xO2-δ (x = 0, 0.12 and 0.25) materials for hydrodeoxygenation of guaiacol: Influence of oxygen vacancies on reactivity Article 10.1016/j.cattod.2023.114338 1 Catalysis Today, v.425 Catalysis Today 425 N scie scopus 001055490000001 2-s2.0-85167618775 Chemistry, Applied Chemistry, Physical Engineering, Chemical Chemistry Engineering Article LOW-INDEX SURFACES ELECTRONIC-STRUCTURE LIGNIN CATALYSTS WATER CERIA OIL PR RAMAN CU Ru catalyst CeO 2 nanocube Pr -doped CeO 2 Oxygen vacancy Hydrodeoxygenation Guaiacol