The effect of Ag as a promoter for Ru/CeO2 catalysts in ammonia synthesis

被引：28
作者：
Lin, Jianxin [1 ]
Zhang, Liuming [1 ]
Wang, Ziqing [1 ]
Ni, Jun [1 ]
Wang, Rong [1 ]
Wei, Kemei [1 ]
机构：
[1] Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou 350002, Fujian, Peoples R China
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2013年 / 366卷
关键词：
Ruthenium catalyst; Silver; SMSI; Ammonia synthesis; CeO2; SUPPORTED RUTHENIUM CATALYSTS; NH3; SYNTHESIS; RU CATALYST; CS-RU/C; CARBON; CESIUM; ACTIVATION; BARIUM; ADSORPTION; DINITROGEN;
D O I：
10.1016/j.molcata.2012.10.019
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：
A series of Ag-Ru/CeO2 catalysts were prepared by conventional impregnation methods and characterized by XRD, BET, XPS, H-2-TPR, H-2-TPD-MS, and N-2-TPD. The activity test shows that ammonia concentration of the catalyst with 6% Ag is 9.4% at 10 MPa, 10,000 h(-1), 400 degrees C, which is 22% higher than that of Ru/CeO2. Such high catalytic activity was ascribed to three effects: electron donating property of partially reduced CeO2-x to Ru metal, the low workfunction of Ru atoms and the less competitive adsorbed between hydrogen and nitrogen on Ru atoms derived from the synergetic effect between Ag and Ru. Crown Copyright (c) 2012 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：375 / 379
页数：5
相关论文
共 50 条
  • [41] Computational Study of CO2 Methanation on Ru/CeO2 Model Surfaces: On the Impact of Ru Doping in CeO2
    Chen, Lulu
    Filot, Ivo A. W.
    Hensen, Emiel J. M.
    ACS CATALYSIS, 2023, 13 (23) : 15230 - 15247
  • [42] Optimization of Ruthenium Particle Size and Ceria Support for Enhanced Activity of Ru/CeO2 Cluster Catalysts in Ammonia Synthesis Under Mild Conditions
    Hirabayashi, Shinichi
    Ichihashi, Masahiko
    Takeda, Yoshihiro
    CATALYSIS LETTERS, 2024, 154 (02) : 487 - 493
  • [43] Optimization of Ruthenium Particle Size and Ceria Support for Enhanced Activity of Ru/CeO2 Cluster Catalysts in Ammonia Synthesis Under Mild Conditions
    Shinichi Hirabayashi
    Masahiko Ichihashi
    Yoshihiro Takeda
    Catalysis Letters, 2024, 154 : 487 - 493
  • [44] Efficient ammonia synthesis over a core-shell Ru/CeO2 catalyst with a tunable CeO2 size: DFT calculations and XAS spectroscopy studies
    Wang, Xiuyun
    Peng, Xuanbei
    Zhang, Yongfan
    Ni, Jun
    Au, Chak-tong
    Jiang, Lilong
    INORGANIC CHEMISTRY FRONTIERS, 2019, 6 (02) : 396 - 406
  • [45] The promoter effect of lanthana on MgO supported ruthenium catalysts for ammonia synthesis
    Yusuke Niwa
    Ken -Ichi Aika
    Research on Chemical Intermediates, 1998, 24 : 593 - 603
  • [46] Influence of Citric Acid on Structures and Catalytic Activities of Ru/AC Catalysts for Ammonia Synthesis
    Ni Jun
    Wang Rong
    Lin Jian-Xin
    Wei Ke-Mei
    ACTA PHYSICO-CHIMICA SINICA, 2009, 25 (03) : 519 - 524
  • [47] Effect of CeO2 support structure on the catalytic performance of ammonia synthesis in an electric field at low temperatures
    Maeda, Ryuku
    Sampei, Hiroshi
    Nakayama, Reika
    Higo, Takuma
    Koshizuka, Yoshiki
    Bando, Yoshiro
    Komanoya, Tasuku
    Nakahara, Yunosuke
    Sekine, Yasushi
    RSC ADVANCES, 2024, 14 (14) : 9869 - 9877
  • [48] Effect of the Metal-Support Interaction in Ag/CeO2 Catalysts on Their Activity in Ethanol Oxidation
    Grabchenko, M. V.
    Mamontov, G. V.
    Zaikovskii, V. I.
    Vodyankina, O. V.
    KINETICS AND CATALYSIS, 2017, 58 (05) : 642 - 648
  • [49] Intuitive study on the effect of support morphology over Cs-Ru/CeO2 catalyst for microwave-initiated ammonia synthesis
    Araia, Alazar
    Wang, Yuxin
    Jiang, Changle
    Brown, Siobhan
    Caiola, Ashley
    Robinson, Brandon
    Hu, Jianli
    CATALYSIS COMMUNICATIONS, 2022, 172
  • [50] Highly efficient Ru/MgO-Er2O3 catalysts for ammonia synthesis
    Javaid, Rahat
    Aoki, Yutaka
    Nanba, Tetsuya
    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2020, 146 (146)
12345