In situ XAFS analysis system for high-pressure catalytic reactions and its application to CO2 hydrogenation over a Rh/Y-zeolite catalyst

被引：19

作者：

Bando, KK ^{[1
]}

Saito, T ^{[1
]}

Sato, K ^{[1
]}

Tanaka, T ^{[1
]}

Dumeignil, F ^{[1
]}

Imamura, M ^{[1
]}

Matsubayashi, N ^{[1
]}

Shimada, H ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF SYNCHROTRON RADIATION | 2001年 / 8卷 / 08期

关键词：

in-situ XAFS; Rh/zeolite catalyst; CO2; hydrogenation;

D O I：

10.1107/S0909049500014382

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An in-situ XAFS cell was developed and used for the structural analysis of a Rh ion-exchanged zeolite catalyst during high-pressure hydrogenation of carbon dioxide. The in-situ cell enabled analyses of the catalyst structures that changed with the reaction atmosphere and elapsed time; the peak assigned to Rh-O scattering changed to that assigned to Rh-Rh scattering at 404 K during the pretreatment by hydrogen. After 30 min. of the carbon dioxide hydrogenation reaction, the peak intensity assigned to Rh-Rh scattering increased corresponding to the increase in the catalytic activity.

引用

页码：581 / 583

页数：3

共 3 条

[1]

Bando KK, 1998, APPL CATAL A-GEN, V173, P47

[2] Characterization of Rh particles and Li-promoted Rh particles in Y zeolite during CO2 hydrogenation -: A new mechanism for catalysis controlled by the dynamic structure of Rh particles and the Li additive effect [J].

Bando, KK ;

Ichikuni, N ;

Soga, K ;

Kunimori, K ;

Arakawa, H ;

Asakura, K .

JOURNAL OF CATALYSIS, 2000, 194 (01) :91-104

[3] Combined (Q)EXAFS/XRD: Technique and applications [J].

Clausen, BS .

CATALYSIS TODAY, 1998, 39 (04) :293-300

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