La Nanorod and Octahedral Mn and Co Spinel Synergistic Effect for Selective Oxidation of Alcohol to Aldehyde

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2024-12-13 DOI:10.1007/s10562-024-04878-6

Kajal Pawar, Pavan More

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Abstract

The La nanorod and cobalt-manganese spinel were synthesised by an improved sol–gel technique for the selective oxidation of alcohols. The active sites of the catalyst were demonstrated using parameters and a recycling study. Moreover, the catalyst was characterized by Raman spectroscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectra, X-ray diffraction, and surface analysis to examine the impact of La addition on the structural and morphological characteristics of CoMn₂O₄. La is introduced into CoMn₂O₄, which decreases the activation energy; therefore, CoMn_2-XLa_XO₄ selectively oxidizes alcohol at lower temperatures. Higher benzyl alcohol to benzaldehyde conversion was observed for the CoMn_1.96La_0.04O₄ catalyst. The catalyst was further also examined for the selective oxidation of other alcohols. The various commercially important substrates like 2-bromo benzyl alcohol, furfuryl alcohol, etc. undergo selective oxidation using a catalyst was also been investigated. The mechanistic aspects of the catalyst with active sites have been explained using Raman and ATR-FTIR adsorption study.

Graphical abstract

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La纳米棒和八面体Mn、Co尖晶石对醇选择性氧化制醛的协同作用

采用改进的溶胶-凝胶选择性氧化技术合成了La纳米棒和钴锰尖晶石。通过参数和循环研究证实了催化剂的活性位点。采用拉曼光谱、x射线光电子能谱、傅里叶变换红外光谱、x射线衍射和表面分析等手段对催化剂进行表征，考察La添加对CoMn2O4结构和形态特征的影响。在CoMn2O4中引入La，降低了活化能；因此，CoMn2-XLaXO4在较低温度下选择性氧化醇。在comn1.96 la0.040 o4催化剂上观察到较高的苯甲醇到苯甲醛的转化率。进一步考察了该催化剂对其他醇的选择性氧化作用。研究了2-溴苄基醇、糠醇等多种重要的工业底物在催化剂作用下的选择性氧化反应。利用拉曼光谱和ATR-FTIR吸附研究对活性位点催化剂的机理进行了解释。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.