Site occupation and activity of catalyst nanoparticles monitored by in situ vibrational spectroscopy

被引：33

作者：

Johánek, V ^{[1
]}

Schauermann, S ^{[1
]}

Laurin, M ^{[1
]}

Libuda, J ^{[1
]}

Freund, HJ ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2003年 / 42卷 / 26期

关键词：

heterogeneous catalysis; kinetics; nitrogen oxide; supported catalysts; surface chemistry;

D O I：

10.1002/anie.200351228

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

On the edge? The distribution of reactants and products over regular and edge sites of well-shaped palladium nanocrystallites is monitored during catalytic NO decomposition by using a combination of molecular beam techniques and in situ vibrational spectroscopy (see scheme, TR-IRAS = time-resolved IR reflection absorption spectroscopy, QMS = quadrupole mass spectrometer). Atomic nitrogen and oxygen species preferentially occupy edge sites on the catalyst particles. The presence of these co-adsorbates controls the NO dissociation activity.

引用

页码：3035 / 3038

页数：4

共 32 条

[1] Metal deposits on well-ordered oxide films [J].

Bäumer, M ;

Freund, HJ .

PROGRESS IN SURFACE SCIENCE, 1999, 61 (7-8) :127-198

[2] NO chemisorption and reactions on metal surfaces: A new perspective [J].

Brown, WA ;

King, DA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (12) :2578-2595

[3] INTERACTION OF NO AND O-2 WITH PD(111) SURFACES .1. [J].

CONRAD, H ;

ERTL, G ;

KUPPERS, J ;

LATTA, EE .

SURFACE SCIENCE, 1977, 65 (01) :235-244

[4] Environmental catalysis into the 21st century [J].

Farrauto, RJ ;

Heck, RM .

CATALYSIS TODAY, 2000, 55 (1-2) :179-187

[5] Adsorption of O2 and NO on Pd nanocrystals supported on Al2O3/NiAl(110):: overlayer and edge structures [J].

Hansen, KH ;

Sljivancanin, Z ;

Lægsgaard, E ;

Besenbacher, F ;

Stensgaard, I .

SURFACE SCIENCE, 2002, 505 (1-3) :25-38

[6]

Henry CR, 1998, SURF SCI REP, V31, P235

[7] Adsorption and thermal behavior of CO and NO on Pd{110} and Pd{320} [J].

Hirsimäki, M ;

Valden, M .

JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (05) :2345-2354

[8] INFRARED REFLECTION-ABSORPTION SPECTROSCOPY OF ADSORBED MOLECULES [J].

Hoffmann, Friedrich M. .

SURFACE SCIENCE REPORTS, 1983, 3 (2-3) :107-192

[9] THE INFLUENCE OF SURFACE-DEFECTS ON THE INFRARED-SPECTRA OF ADSORBED SPECIES [J].

HOLLINS, P .

SURFACE SCIENCE REPORTS, 1992, 16 (02) :51-94

[10] Surface and subsurface oxygen on Pd(111) [J].

Leisenberger, FP ;

Koller, G ;

Sock, M ;

Surnev, S ;

Ramsey, MG ;

Netzer, FP ;

Klötzer, B ;

Hayek, K .

SURFACE SCIENCE, 2000, 445 (2-3) :380-393

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