Adsorption and decomposition of dimethyl methylphosphonate on Y2O3 nanoparticles

被引：74

作者：

Gordon, Wesley O. ^{[1
]}

Tissue, Brian M. ^{[1
]}

Morris, John R. ^{[1
]}

机构：

[1] Virginia Tech, Dept Chem, Blacksburg, VA 24061 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 08期

关键词：

D O I：

10.1021/jp0650376

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：

Experimental studies explore the adsorption and decomposition pathways of the nerve agent simulant, dimethyl methylphosphonate (DMMP), on Y2O3 nanoparticles with mean diameters of 6 and 2 run. DMMP adsorption on Y203 was studied in an ultrahigh vacuum surface science instrument with X-ray photoelectron spectroscopy and reflection absorption infrared spectroscopy. Uptake probability measurements reveal an initial sticking probability near unity, while vibrational spectroscopy indicates that adsorbed DMMP dissociates via cleavage of a P-OCH3 bond to form a bridging O-P-O surface species. The extent of DMMP decomposition is found to increase as the particle size decreases, suggesting that edge, corner, and defect sites play a major role in the outcome of the gas-surface interaction.

引用

页码：3233 / 3240

页数：8

共 66 条

[1] NANOSCALE METAL-OXIDE PARTICLES AS CHEMICAL REAGENTS - HEATS OF ADSORPTION OF HETEROATOM-CONTAINING ORGANICS ON HEAT-TREATED MAGNESIUM-OXIDE SAMPLES OF VARYING SURFACE-AREAS [J].

ATTEYA, M ;

KLABUNDE, KJ .

CHEMISTRY OF MATERIALS, 1991, 3 (01) :182-187

[2] INTERACTION OF DIMETHYL METHYLPHOSPHONATE WITH METAL-OXIDES [J].

AURIANBLAJENI, B ;

BOUCHER, MM .

LANGMUIR, 1989, 5 (01) :170-174

[3] ESCA STUDY OF TERMINATION OF PASSIVATION OF ELEMENTAL METALS [J].

BARR, TL .

JOURNAL OF PHYSICAL CHEMISTRY, 1978, 82 (16) :1801-1810

[4] The decomposition pathways of methanol on clean Ru(0001), studied by reflection-absorption infrared spectroscopy (RAIRS) [J].

Barros, RB ;

Garcia, AR ;

Ilharco, LM .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (45) :11186-11193

[5] INFRARED INTENSITIES OF LIQUIDS .17. INFRARED REFRACTIVE-INDEXES FROM 8000-CM(-1) TO 350-CM(-1), ABSOLUTE INTEGRATED ABSORPTION INTENSITIES, TRANSITION MOMENTS, AND DIPOLE-MOMENT DERIVATIVES OF METHAN-D(3)-OL AND METHANOL-D(4) AT 25-DEGREES-C [J].

BERTIE, JE ;

ZHANG, SL .

JOURNAL OF CHEMICAL PHYSICS, 1994, 101 (10) :8364-8379

[6] Thermocatalytic oxidation of dimethyl methylphosphonate on supported metal oxides [J].

Cao, LX ;

Segal, SR ;

Suib, SL ;

Tang, X ;

Satyapal, S .

JOURNAL OF CATALYSIS, 2000, 194 (01) :61-70

[7] Interactions between self-assembled monolayers and an organophosphonate - Detailed study using surface acoustic wave-based mass analysis, polarization modulation FTIR spectroscopy and ellipsometry [J].

Crooks, RM ;

Yang, HC ;

McEllistrem, LJ ;

Thomas, RC ;

Ricco, AJ .

FARADAY DISCUSSIONS, 1997, 107 :285-305

[8] CATALYTIC CONVERSION OF ALCOHOLS .5. SELECTIVITY PROPERTIES OF Y2O3 [J].

DAVIS, BH .

JOURNAL OF CATALYSIS, 1978, 52 (01) :176-185

[9] EXAFS observation of the Sr and Fe site structural environment in SrO and Fe2O3-coated SrO nanoparticles used as carbon tetrachloride destructive adsorbents [J].

Decker, S ;

Lagadic, I ;

Klabunde, KJ ;

Moscovici, J ;

Michalowicz, A .

CHEMISTRY OF MATERIALS, 1998, 10 (02) :674-678

[10] Catalyzed destructive adsorption of environmental toxins with nanocrystalline metal oxides. Fluoro-, chloro-, bromocarbons, sulfur, and organophosophorus compounds [J].

Decker, SP ;

Klabunde, JS ;

Khaleel, A ;

Klabunde, KJ .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (04) :762-768

← 1 2 3 4 5 6 7 →