PtNi catalysts prepared via borohydride reduction for hydrogenation of benzene

被引:57
作者
Abu Bakar, N. H. H. [1 ,2 ]
Bettahar, M. M. [1 ]
Abu Bakar, M. [2 ]
Monteverdi, S. [1 ]
Ismail, J. [2 ]
Alnot, M. [3 ]
机构
[1] Univ Nancy 1, Fac Sci, IJB, CNRS,UMR 7565, F-54506 Vandoeuvre Les Nancy, France
[2] Univ Sains Malaysia, Sch Chem Sci, Gelugor 11800, P Pinang, Malaysia
[3] Univ Nancy 1, Phys Mat Lab, UMR 7556, F-54506 Vandoeuvre Les Nancy, France
关键词
Pt/Ni bimetallic nanoparticles; Silica support; Impregnation technique; Hydrogenation of benzene; NICKEL-CATALYSTS; METHANOL ELECTROOXIDATION; SUPPORTED NICKEL; ALLOY NANOPARTICLES; CRYSTALLITE SIZE; ACTIVATED CARBON; METAL PARTICLES; NI; CO; FE;
D O I
10.1016/j.jcat.2009.04.011
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
Pt/Ni supported on silica catalysts were synthesized via co-impregnation (CI) and step-impregnation (SI) techniques using NaBH4 as the metal ions reducing agent. They were characterized by H-2-TPR and H-2-TPD, XRD, TEM, SEM and EDSX analyses as well as tested for the hydrogenation of benzene. The preparation method employed facilitates the formation of totally reduced pure metal or bimetallic metal particles on the surface and catalytic properties are governed by both the Pt/Ni ratio and mode of preparation. Co-impregnated catalysts exhibit a synergistic effect when a moderate amount of Pt is available: Pt55Ni45-Cl catalyst was more active than both the pure monometallic catalysts. XRD and SEM equipped with EDSX lead us to believe that alloying occurs in the catalyst. Furthermore, surface segregation of Pt on the alloys as proven by XPS also contributes to this enhanced reactivity. In contrast to co-impregnated catalyst, all the step-impregnated catalysts show low catalytic reactivity when compared to pure Pt. (C) 2009 Elsevier Inc. All rights reserved.
引用
收藏
页码:63 / 71
页数:9
相关论文
共 35 条
[1]   Relation between crystallite size and dispersion on supported metal catalysts [J].
Borodzinski, A ;
Bonarowska, M .
LANGMUIR, 1997, 13 (21) :5613-5620
[2]   NUCLEATION AND PARTICLE GROWTH-PROCESSES INVOLVED IN THE PREPARATION OF SILICA-SUPPORTED NICKEL MATERIALS BY A 2-STEP PROCEDURE [J].
CHE, M ;
CHENG, ZX ;
LOUIS, C .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1995, 117 (07) :2008-2018
[3]   Shape-controlled synthesis of platinum nanocrystals for catalytic and electrocatalytic applications [J].
Chen, Jingyi ;
Lim, Byungkwon ;
Lee, Eric P. ;
Xia, Younan .
NANO TODAY, 2009, 4 (01) :81-95
[4]   Ni-Ce intermetallic phases in CeO2-supported nickel catalysts synthesized by γ-radiolysis [J].
Chettibi, S ;
Wojcieszak, R ;
Boudjennad, EH ;
Belloni, J ;
Bettahar, MM ;
Keghouche, N .
CATALYSIS TODAY, 2006, 113 (3-4) :157-165
[5]   Fractal aspects in the catalytic reforming of naphtha [J].
Coppens, MO ;
Froment, GF .
CHEMICAL ENGINEERING SCIENCE, 1996, 51 (10) :2283-2292
[6]   Preparation of PtNi nanoparticles for the electrocatalytic oxidation of methanol [J].
Deivaraj, TC ;
Chen, WX ;
Lee, JY .
JOURNAL OF MATERIALS CHEMISTRY, 2003, 13 (10) :2555-2560
[7]   Selective hydrogenation of cinnamaldehyde over Pt/ZrO2 catalyst modified by Cr, Mn, Fe, Co and Ni [J].
Han, XX ;
Zhou, RX ;
Yue, BH ;
Zheng, XM .
CATALYSIS LETTERS, 2006, 109 (3-4) :157-161
[8]   Influence of alloying platinum on the hydrogenation of chloronitrobenzene over PtM/ZrO2 catalysts with M=Cr, Mn, Fe, Co, Ni, Cu [J].
Han, XX ;
Zhou, RX ;
Lai, GH ;
Zheng, XM .
REACTION KINETICS AND CATALYSIS LETTERS, 2004, 83 (01) :55-61
[9]   Enantio-differentiating hydrogenation of methyl acetoacetate over tartaric acid-modified nickel catalysts: effects of preparation method of supported nickel on activity and selectivity of catalysts [J].
Jo, D ;
Lee, JS ;
Lee, KH .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2004, 222 (1-2) :199-205
[10]   On the role of reactant transport and (surface) alloy formation for the CO tolerance of carbon supported PtRu polymer electrolyte fuel cell catalysts [J].
Kaiser, J. ;
Colmenares, L. ;
Jusys, Z. ;
Moertel, R. ;
Boennemann, H. ;
Koehl, G. ;
Modrow, H. ;
Hormes, J. ;
Behm, R. J. .
FUEL CELLS, 2006, 6 (3-4) :190-202