固体核磁共振技术研究金属氧化物类固体酸催化剂的酸碱性

doi:10.11938/cjmr20212939

摘要/Abstract

摘要：

固体核磁共振技术是研究固体催化剂酸碱性的有效工具.本文主要介绍了本课题组利用固体核磁共振技术进行固体酸催化剂酸碱性研究的进展，包括吸附水分子对金属氧化物表面酸性质影响的研究，以及结合酸碱探针分子共吸附表征方法对金属氧化物表面酸碱性的研究，对固体核磁共振技术定性和定量分析固体催化剂的酸碱性提出了一些新的见解.

关键词: 固体核磁共振, 吸附水分子, 酸碱探针分子, 酸性质, 碱性质

Abstract:

Solid-state nuclear magnetic resonance (NMR) is an important technique to study the acidity and basicity of solid catalysts. Here we review some research works carried out in our laboratory, including studies on the acidity of metal oxides under different water contents, the acidity and basicity characterization of metal oxides by using acidic and basic probe molecules simultaneously. The investigations extend solid-state NMR technique in qualitative and quantitative studies on the acidity and basicity of solid catalysts.

Key words: solid-state nuclear magnetic resonance, adsorbed water molecules, acid-base probe molecules, acidity, basicity

中图分类号:

O643

陈欣,付颖懿,岳斌,贺鹤勇. 固体核磁共振技术研究金属氧化物类固体酸催化剂的酸碱性[J]. 波谱学杂志, 2021, 38(4): 491-502.

Xin CHEN,Ying-yi FU,Bin YUE,He-yong HE. Acidity and Basicity of Solid Acid Catalysts Studied by Solid-State NMR[J]. Chinese Journal of Magnetic Resonance, 2021, 38(4): 491-502.

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催化剂	吸附模式	碱密度/(μmol·g^-1)				酸密度/(μmol·g^-1)
催化剂	吸附模式	强	中等	弱	总量	Lewis酸	Brønsted酸	总量
MgO	单吸附	-	10.5	-	10.5	-	-	-
	共吸附	3.6	6.9	6.7	17.2	15.8	-	15.8
ZrO₂	单吸附	0.1	8.9	6.0	15.0	108.5	2.8	111.3
	共吸附	0.8	13.0	6.0	19.8	65.0	10.8	75.8
Al₂O₃	单吸附	-	4.2	36.6	40.8	220.1	25.9	246.0
	共吸附	-	4.2	53.6	57.8	175.9	102.3	278.2

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