TY - JOUR
T1 - Nanostructured Ru(2 wt%)/PrxCe1−xO2-δ (x = 0, 0.12 and 0.25) materials for hydrodeoxygenation of guaiacol
T2 - Influence of oxygen vacancies on reactivity
AU - Ridwan, Muhammad
AU - Dwiatmoko, Adid Adep
AU - Ha, Jeong Myeong
AU - Yoon, Chang Won
N1 - Funding Information:
The research was supported financially by the Flagship Program ( 2E30201 ) through the Korea Institute of Science and Technology . Also, C.W.Yoon acknowledges the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) ( NRF-2023R1A2C2007558 ). Muhammad Ridwan would like to acknowledge Universitas Indonesia for the support through PUTI Grant with contract number NKB-482/UN2.RST/HKP.05.00/2023 .
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2024/1/1
Y1 - 2024/1/1
N2 - 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-δ nanocubes (Ru-3) and Ru(2 wt%)/Ce0.75Pr0.25O2-δ 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 Ru-2 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.
AB - 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-δ nanocubes (Ru-3) and Ru(2 wt%)/Ce0.75Pr0.25O2-δ 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 Ru-2 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.
KW - CeO nanocube
KW - Guaiacol
KW - Hydrodeoxygenation
KW - Oxygen vacancy
KW - Pr-doped CeO
KW - Ru catalyst
UR - http://www.scopus.com/inward/record.url?scp=85167618775&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2023.114338
DO - 10.1016/j.cattod.2023.114338
M3 - Article
AN - SCOPUS:85167618775
SN - 0920-5861
VL - 425
JO - Catalysis Today
JF - Catalysis Today
M1 - 114338
ER -