FT-IR INVESTIGATION OF METHANE ABSORPTION ON SILICA

	FT-IR INVESTIGATION OF METHANE ABSORPTION ON SILICA
	LU, JG; LI, SB; LI, GQ; LI, C; XIN, Q
刊名	APPLIED SURFACE SCIENCE
	1994-09-01
卷号	81 期号:1 页码:37-41
ISSN号	0169-4332
文献子类	Article
英文摘要	Methane adsorption on silica has been studied by Fourier-Transform Infrared (FT-IR) spectroscopy. The spectrometer was fitted with a specially designed IR cell capable of performing in a wide temperature range of 100-1000 K. Adsorbed methane gives three IR bands at 3008, 3904 and 1304 cm-1 which could be attributed to the V1 (2904 cm-1), V3 (3008 cm-1) and V4 (1304 cm-1) modes of methane, respectively. The appearance of the V1 mode indicates that the Td symmetry of methane is distorted by the adsorption. The intensities of the three bands increase remarkably with outgassing temperatures near 573 K and then slowly with higher outgassing temperatures. A hydroxyl with the IR band at 3750 cm-1 is perturbed evidently by the adsorbed methane, therefore resulting in a red-shift band at 3720 cm-1. Coadsorbed CO slightly affects the adsorbed methane, indicating only weak interaction between CH4 and surface cations of silica. It is proposed that the adsorbed CH4 on silica is formed mainly via the interaction with both surface hydroxyls and surface coordinatively unsaturated oxygen-anions.
WOS关键词	CARBON-MONOXIDE ; SPECTROSCOPY ; SURFACES ; OXIDE
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:A1994PG63100005
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/167968]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	LU, JG
作者单位	CHINESE ACAD SCI,DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA
推荐引用方式 GB/T 7714	LU, JG,LI, SB,LI, GQ,et al. FT-IR INVESTIGATION OF METHANE ABSORPTION ON SILICA[J]. APPLIED SURFACE SCIENCE,1994,81(1):37-41.
APA	LU, JG,LI, SB,LI, GQ,LI, C,&XIN, Q.(1994).FT-IR INVESTIGATION OF METHANE ABSORPTION ON SILICA.APPLIED SURFACE SCIENCE,81(1),37-41.
MLA	LU, JG,et al."FT-IR INVESTIGATION OF METHANE ABSORPTION ON SILICA".APPLIED SURFACE SCIENCE 81.1(1994):37-41.