A位缺陷对LaxNiO3+δ在苯酚加氢脱氧反应中催化性能的影响

doi:10.11896/cldb.23070161

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Abstract Adopting a method combines sol-gel method and hydrothermal method, a series of La_x NiO_3+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 La_xNiO_3+δ to phenol is mainly direct deoxygenation reaction. At atmospheric pressure and 350 ℃, the one-way conversion of La_0.9NiO_3+δ catalyst was 25.71%, and the benzene selectivity was 94.87%.

Key words： La_xNiO₃ perovskite oxide hydrodeoxygenation cation deficiency

Published: 10 December 2024 Online: 2024-12-10

CLC number:

O614

Fund:Major Projects in Basic Research and Applied Research of Guangdong Province (2017KZDXM057) and Featured Innovation Project of Guangdong Province(2019KTSCX104).

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	PENG Linsen
	LI Ning
	JIANG Wu
	LIAN Caixia

Cite this article:

PENG Linsen,LI Ning,JIANG Wu, et al. Effect of A-site-deficient on the Catalytic Performance of La_xNiO_3+δ in Phenol Hydrodeoxygenation Reactions[J]. Materials Reports, 2024, 38(23): 23070161-5.

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http://www.mater-rep.com/EN/10.11896/cldb.23070161 OR http://www.mater-rep.com/EN/Y2024/V38/I23/23070161

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