Effect of A-site-deficient on the Catalytic Performance of LaxNiO3+δ in Phenol Hydrodeoxygenation Reactions
PENG Linsen1,2, LI Ning1,*, JIANG Wu1, LIAN Caixia1
1 School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China 2 School of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
Abstract: Adopting a method combines sol-gel method and hydrothermal method, a series of Lax NiO3+δ (x=1, 0.9, 0.8, 0.7, 0.6) perovskite oxides samples with A-site defects were prepared by using monodisperse poly(methyl methacrylate) microspheres as templates respectively. The crystalline phase structure, surface morphology, elemental valence, specific surface area and pore size distribution of them were characterised by XRD, SEM, XPS and H2-TPR, etc. The results showed that a low level of A-site defects could form stable perovskites, and as the level of defects increased, the perovskites were removed with the appearance of new phases NiO and La2NiO4. By controlling the A-site defects within a certain range, the increase of Ni2+ in the perovskite structure is conducive to the formation of oxygen vacancies and can promote the reduction of nickel ions in the B-site to produce highly dispersed Ni0 species. The hydrodeoxygenation reaction of LaxNiO3+δ to phenol is mainly direct deoxygenation reaction. At atmospheric pressure and 350 ℃, the one-way conversion of La0.9NiO3+δ catalyst was 25.71%, and the benzene selectivity was 94.87%.
彭林森, 李凝, 蒋武, 练彩霞. A位缺陷对LaxNiO3+δ在苯酚加氢脱氧反应中催化性能的影响[J]. 材料导报, 2024, 38(23): 23070161-5.
PENG Linsen, LI Ning, JIANG Wu, LIAN Caixia. Effect of A-site-deficient on the Catalytic Performance of LaxNiO3+δ in Phenol Hydrodeoxygenation Reactions. Materials Reports, 2024, 38(23): 23070161-5.
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2024, Vol. 38 
