Platinum group metals substituted MCM-41 molecular sieves: Synthesis, characterization and application as novel catalysts for the reduction of NO by CO

被引：17

作者：

Ravat, Vilas ^{[3
]}

Mantri, Dinesh B. ^{[1
]}

Selvam, P. ^{[2
]}

Aghalayam, Preeti ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Bombay 400076, Maharashtra, India

[2] Indian Inst Technol, Dept Chem, Madras 600036, Tamil Nadu, India

[3] Indian Inst Technol, Dept Chem, Bombay 400076, Maharashtra, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 314卷 / 1-2期

关键词：

Hydrothermal synthesis; Mesoporous molecular sieves; M; (Pd; Rh; Ir; Pt); MCM-41; Reduction; NO; LEAN-BURN CONDITIONS; NITRIC-OXIDE; SELECTIVE REDUCTION; OXIDIZING CONDITIONS; PALLADIUM CATALYSTS; MESOPOROUS SILICA; NITROGEN MONOXIDE; EXCESS OXYGEN; MECHANISM; O-2;

D O I：

10.1016/j.molcata.2009.08.016

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：

Mesoporous MCM-41 molecular sieves with Si/M (molar) ratios of 100 containing platinum group metals (Pd, Pt, Rh. Ir) were synthesized by the hydrothermal method These catalysts were systematically characterized by various analytical a rid spectroscopic techniques, viz, XRD, TEM. DRUV-vis, N-2 sorption XRD analysis confirmed that the presence of platinum metals did not influence the parent structure and phase purity of the MCM-41 catalysts DRUV-vis spectral studies of MCM-41 indicate the presence of platinum metal ions The catalytic activities of these catalysts were evaluated for the reduction of NO by CO as a function of temperature The Study revealed that the catalytic activity is, in the order (Rh>Ir>Pd>Pt) Our experimental results are in good agreement with theoretical previous analysts based on the NO center dot dissociation activation energy. (C) 2009 Elsevier B V. All rights reserved

引用

页码：49 / 54

页数：6

共 33 条

[1] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES [J].

BECK, JS ;

VARTULI, JC ;

ROTH, WJ ;

LEONOWICZ, ME ;

KRESGE, CT ;

SCHMITT, KD ;

CHU, CTW ;

OLSON, DH ;

SHEPPARD, EW ;

MCCULLEN, SB ;

HIGGINS, JB ;

SCHLENKER, JL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (27) :10834-10843

[2]

BRUNAUR J, 1940, J AM CHEM SOC, V62, P1723

[3] Adsorbate-assisted NO decomposition in NO reduction by C3H6 over Pt/Al2O3 catalysts under lean-burn conditions [J].

Burch, R ;

Watling, TC .

CATALYSIS LETTERS, 1996, 37 (1-2) :51-55

[4] Kinetics and mechanism of the reduction of NO by n-octane over Pt/Al2O3 under lean-burn conditions [J].

Burch, R ;

Fornasiero, P ;

Watling, TC .

JOURNAL OF CATALYSIS, 1998, 176 (01) :204-214

[5] The selective catalytic reduction of nitric oxide by propylene over Pt/SiO2 [J].

Captain, DK ;

Roberts, KL ;

Amiridis, MD .

CATALYSIS TODAY, 1998, 42 (1-2) :93-100

[6] Nonselective reduction of NO by CO under oxidizing conditions on supported rhodium sol-gel catalysts [J].

Castillo, S ;

MoranPineda, M ;

Gomez, R ;

Lopez, T .

JOURNAL OF CATALYSIS, 1997, 172 (01) :263-266

[7] DISSOCIATION AND OXIDATION OF CARBON-MONOXIDE OVER RH/AL2O3 CATALYSTS [J].

CHO, BK ;

STOCK, CJ .

JOURNAL OF CATALYSIS, 1989, 117 (01) :202-217

[8] Acylation of aromatic compounds using moisture insensitive InCl3 impregnated mesoporous Si-MCM-41 catalyst [J].

Choudhary, VR ;

Jana, SK ;

Patil, NS .

TETRAHEDRON LETTERS, 2002, 43 (06) :1105-1107

[9] Three-way catalyst emissions control technologies for spark-ignition engines - recent trends and future developments [J].

Collins, Neil R. ;

Twigg, Martyn V. .

TOPICS IN CATALYSIS, 2007, 42-43 (1-4) :323-332

[10] Direct decomposition of nitric oxide on alumina-modified amorphous and mesoporous silica-supported palladium catalysts [J].

Cónsul, JMD ;

Peralta, CA ;

Benvenutti, EV ;

Ruiz, JAC ;

Pastore, HO ;

Baibich, IM .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2006, 246 (1-2) :33-38

← 1 2 3 4 →