SURFACE-REACTIONS OF MOLECULAR-HYDROGEN ON GAS-PHASE DEPOSITED MAGNESIUM-OXIDE

被引：7

作者：

HOFMANN, P

JACOB, KH

KNOZINGER, E

机构：

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1993年 / 97卷 / 03期

关键词：

HIGHLY DISPERSED MGO; MOLECULAR REACTIONS; SPECTROSCOPY; INFRARED; SURFACE REACTIONS;

D O I：

10.1002/bbpc.19930970310

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：

MgO samples with a specific surface area of up to 400 m2/g were prepared by chemical gas phase-deposition. The resulting samples were used for H-2 and D2 chemisorption experiments. IR spectroscopy clearly evidences that homolytic and heterolytic dissociation processes are effective. The corresponding surface centers are radicals (O- and Mg+) and ion pairs Mg3C2+O3C2-, respectively. In addition, two isotope exchange reactions on completely different time scales occur between D2 and isolated surface OH groups.

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页码：316 / 318

页数：3

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