The effects of CeO2 on the activity and stability of Pt supported catalysts for methane reforming, as addressed by in situ temperature resolved XAFS and TEM analysis

被引：43
|
作者：
Ferreira, A. P. [1 ]
Zanchet, D. [2 ]
Araujo, J. C. S. [1 ]
Liberatori, J. W. C. [1 ]
Souza-Aguiar, E. F. [4 ]
Noronha, F. B. [3 ]
Bueno, J. M. C. [1 ]
机构：
[1] Univ Fed Sao Carlos, BR-13560 Sao Carlos, SP, Brazil
[2] LNLS, BR-13083970 Campinas, SP, Brazil
[3] Inst Nacl Tecnol, Lab Catalise, BR-21081312 Rio De Janeiro, Brazil
[4] Univ Fed Rio de Janeiro, CENPES PETROBRAS, Rio De Janeiro, Brazil
来源：
JOURNAL OF CATALYSIS | 2009年 / 263卷 / 02期
关键词：
CeO2; Pt-supported catalysts; Synthesis gas; Natural gas; Autothermal reforming of methane; Partial oxidation of methane; In situ XAFS; SYNTHESIS GAS-PRODUCTION; PARTIAL OXIDATION; CERIA CONTENT; PLATINUM; MECHANISM; OXYGEN; PERFORMANCE; REACTIVITY; CLUSTERS; SURFACE;
D O I：
10.1016/j.jcat.2009.02.026
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 effects of Ce as a promoter on the activity and stability of Pt/Al2O3 and Pt/CeO2-Al2O3 Catalysts for autothermal reforming and partial oxidation of methane (POM) were investigated. The Pt/CeO2-Al2O3 catalyst exhibited higher activity and stability than the Pt/Al2O3 catalyst. Analysis by in situ X-ray absorption spectroscopy under POM conditions reveals that Pt is reduced by heating the catalysts to about 730 K. The overall first-shell coordination numbers suggest changes in Pt cluster morphology with increasing temperature. Transmission electron microscopy showed strong Pt agglomeration with time on stream for the Pt/Al2O3 catalyst. The higher stability of the Pt/CeO2-Al2O3 catalyst was attributed to a combination of different properties: (i) hindrance of carbon deposition on the Pt surface for a reactor led with low H2O/CH4 ratio; (ii) interaction of Pt-O-Ce species in the presence of oxygen, inhibiting vapor and diffusion transport Of PtO2 and mainly, (iii) thermal stability of the support, which prevents the loss of surface area, and consequently the sintering of the Pt. (C) 2009 Elsevier Inc. All rights reserved.
引用
收藏
页码：335 / 344
页数：10
相关论文
共 50 条
  • [31] Effect of CeO2 and La2O3 on the Activity of CeO2−La2O3/Al2O3-Supported Pd Catalysts for Steam Reforming of Methane
    W. H. Cassinelli
    L. S. F. Feio
    J. C. S. Araújo
    C. E. Hori
    F. B. Noronha
    C. M. P. Marques
    J. M. C. Bueno
    Catalysis Letters, 2008, 120 : 86 - 94
  • [32] The effects of Pt addition to supported Ni catalysts on dry (CO2) reforming of methane to syngas
    Mahoney, Elizabeth G.
    Pusel, Julia M.
    Stagg-Williams, Susan M.
    Faraji, Sepideh
    JOURNAL OF CO2 UTILIZATION, 2014, 6 : 40 - 44
  • [33] Role of Pt in the Activity and Stability of PtNi/CeO2–Al2O3 Catalysts in Ethanol Steam Reforming for H2 Production
    M. C. Sanchez-Sanchez
    R. M. Navarro
    I. Espartero
    A. A. Ismail
    S. A. Al-Sayari
    J. L. G. Fierro
    Topics in Catalysis, 2013, 56 : 1672 - 1685
  • [34] Mesoporous Silica-Supported Nanostructured PdO/CeO2 Catalysts for Low-Temperature Methane Oxidation
    Dai, Yiling
    Kumar, Vanama Pavan
    Zhu, Chujie
    MacLachlan, Mark J.
    Smith, Kevin J.
    Wolf, Michael O.
    ACS APPLIED MATERIALS & INTERFACES, 2018, 10 (01) : 477 - 487
  • [35] High resolution TEM investigation of CeO2/SM2O3 -: supported Pd catalysts for methanol reforming in intermediate temperature solid oxide fuel cells
    Baker, RT
    Sainero, LMG
    Metcalfe, IS
    Sahibzada, M
    ELECTRON MICROSCOPY AND ANALYSIS 2003, 2004, (179): : 463 - 466
  • [36] Low temperature catalytic steam reforming of ethanol. 2. Preliminary kinetic investigation of Pt/CeO2 catalysts
    Ciambelli, P.
    Palma, V.
    Ruggiero, A.
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2010, 96 (1-2) : 190 - 197
  • [37] Ethanol Dry Reforming over Mn-Doped Co/CeO2 Catalysts with Enhanced Activity and Stability
    Wang, Mingyue
    Li, Feifei
    Chen, Qing
    Cai, Weijie
    ENERGY & FUELS, 2021, 35 (17) : 13945 - 13954
  • [38] Low Temperature CO2 Reforming with Methane Reaction over CeO2 -Modified Ni@SiO2 Catalysts
    Wang, Fagen
    Han, Kaihang
    Yu, Weishu
    Zhao, Long
    Wang, Yan
    Wang, Xiaojun
    Yu, Hao
    Shi, Weidong
    ACS APPLIED MATERIALS & INTERFACES, 2020, 12 (31) : 35022 - 35034
  • [39] Balancing the carbon formation and removal by regulating Zr doping within CeO2 nanotube-supported-Ni catalysts for deriving the superior stability in low-temperature dry reforming of methane
    Zhou, Dan
    Huang, Haihong
    Liang, Wanwen
    Wu, Xuanjun
    Dang, Chengxiong
    Cai, Weiquan
    ENERGY CONVERSION AND MANAGEMENT, 2024, 322
  • [40] Cerium oxide as a promoter for the electro-oxidation reaction of ethanol: in situ XAFS characterization of the Pt nanoparticles supported on CeO2 nanoparticles and nanorods
    Corchado-Garcia, Juan
    Betancourt, Luis E.
    Velez, Carlos A.
    Senanayake, Sanjaya D.
    Stacchiola, Dario
    Sasaki, Kotaro
    Guinel, Maxime J. -F.
    Zhou, Yunyun
    Cheung, Chin Li
    Cabrera, Carlos R.
    PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2015, 17 (48) : 32251 - 32256
12345