Reactivity of mesoporous carbon against water - An in-situ XPS study

被引：140

作者：

Reiche, Sylvia ^{[1
]}

Blume, Raoul ^{[2
]}

Zhao, Xiao Chen ^{[1
]}

Su, Dangsheng ^{[1
]}

Kunkes, Edward ^{[1
]}

Behrens, Malte ^{[1
]}

Schloegl, Robert ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany

[2] Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

来源：

CARBON | 2014年 / 77卷

关键词：

RAY PHOTOELECTRON-SPECTROSCOPY; CONTAINING FUNCTIONAL-GROUPS; SURFACE-STRUCTURE; OXYGEN; AEROGELS; OXIDATION; POLYMERS; RESORCINOL; STABILITY; NANOTUBES;

D O I：

10.1016/j.carbon.2014.05.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Functionalized mesoporous carbon catalysts can be used in the acid catalyzed dehydration of fructose to 5-hydroxymethyl furfural (HMF). However, strong deactivation can be observed after preconditioning of the material in the reaction solvent 2-butanol. Surface changes caused by the pretreatment have been studied by XPS. The comparison of the pristine sample and the pretreated carbon sample showed similar distribution of oxygen functional groups by ex-situ XPS, as well as similar behavior during heating in vacuum. However, the addition of water (0.1 mbar vapor pressure) and subsequent heating to 130 degrees C exhibited prominent differences in the evolution of the O1s, as well as for the C1s spectra of the two samples. Changes in the surface termination and hydrophobicity of the materials are discussed under the aspect of possible reactions of surface functional groups with the alcoholic solvent and water. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：175 / 183

页数：9

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