CO2 hydrogenation on a metal hydride surface

被引：36

作者：

Kato, Shunsuke ^{[1
]}

Borgschulte, Andreas ^{[1
]}

Ferri, Davide ^{[3
]}

Bielmann, Michael ^{[1
]}

Crivello, Jean-Claude ^{[4
]}

Wiedenmann, Daniel ^{[2
]}

Parlinska-Wojtan, Magdalena ^{[5
]}

Rossbach, Peggy ^{[6
]}

Lu, Ye ^{[3
]}

Remhof, Arndt ^{[1
]}

Zuettel, Andreas ^{[1
]}

机构：

[1] Empa, Lab Hydrogen & Energy, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[2] Univ Fribourg, Dept Geosci, CH-1700 Fribourg, Switzerland

[3] Empa, Lab Solid State Chem & Catalysis, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[4] CNRS, ICMPE CMTR, Thiais, France

[5] Empa, Electron Microscopy Ctr, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[6] Empa, Lab Nanoscale Mat Sci, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 16期

关键词：

CARBON-DIOXIDE; INTERMETALLIC COMPOUNDS; THERMAL-EXPANSION; H-2; ABSORPTION; ALLOYS; ENERGY; METHANATION; LANI5; SPECTROSCOPY; CATALYSTS;

D O I：

10.1039/c2cp23264b

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：

The catalytic hydrogenation of CO2 at the surface of a metal hydride and the corresponding surface segregation were investigated. The surface processes on Mg2NiH4 were analyzed by in situ X-ray photoelectron spectroscopy (XPS) combined with thermal desorption spectroscopy (TDS) and mass spectrometry (MS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS). CO2 hydrogenation on the hydride surface during hydrogen desorption was analyzed by catalytic activity measurement with a flow reactor, a gas chromatograph (GC) and MS. We conclude that for the CO2 methanation reaction, the dissociation of H-2 molecules at the surface is not the rate controlling step but the dissociative adsorption of CO2 molecules on the hydride surface.

引用

页码：5518 / 5526

页数：9

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