Probing the surface of nanosheet H-ZSM-5 with FTIR spectroscopy

被引：62

作者：

Bleken, Bjorn-Tore Lonstad ^{[1
]}

Mino, Lorenzo ^{[2
,3
]}

Giordanino, Filippo ^{[2
,3
]}

Beato, Pablo ^{[4
]}

Svelle, Stian ^{[1
]}

Lillerud, Karl Petter ^{[1
]}

Bordiga, Silvia ^{[1
,2
,3
]}

机构：

[1] Univ Oslo, Dept Chem, Ctr Mat Sci & Nanotechnol SMN, InGAP Ctr Res Based Innovat, N-0315 Oslo, Norway

[2] NIS Ctr Excellence, Dipartimento Chim, I-10125 Turin, Italy

[3] INSTM Univ Torino, I-10125 Turin, Italy

[4] Haldor Topsoe, DK-2800 Lyngby, Denmark

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 32期

关键词：

AMORPHOUS SILICA-ALUMINA; MFI ZEOLITE NANOSHEETS; IR SPECTROSCOPY; CARBON-MONOXIDE; ACID SITES; METHANOL; ISOMERIZATION; MECHANISMS; ADSORPTION; MORPHOLOGY;

D O I：

10.1039/c3cp51280k

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：

Herein we report FTIR in situ adsorption of molecular hydrogen, carbon monoxide, water, methanol, pyridine and 2,4,6-trimethylpyridine (collidine) on nanosheet H-ZSM-5 which was recently studied in the methanol to hydrocarbons (MTH) reaction. The nature of the hydroxyl groups and surface species are described in detail. The IR spectrum of nanosheet H-ZSM-5 is dominated by silanols, which saturate the external surfaces. The acidity of Si(OH)Al is comparable to that observed in the case of standard microcrystalline H-ZSM-5. The study of the external surface allows the recognition of Si(OH)Al species located at the channel entrance, which are mostly all accessible to hindered molecules such as collidine.

引用

页码：13363 / 13370

页数：8

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