Silica-encapsulated palladium clusters for methane combustion catalysis

被引:2
作者
Sudheeshkumar, V. [1 ]
Lavier, Miranda [1 ]
Lukan, Brianna [1 ]
Shen, Jing [2 ]
Semagina, Natalia [2 ]
Scott, Robert W. J. [1 ]
机构
[1] Univ Saskatchewan, Dept Chem, 110 Sci Pl, Saskatoon, SK S7N 5C9, Canada
[2] Univ Alberta, Dept Chem & Mat Engn, 9211-116 St, Edmonton, AB T6G 1H9, Canada
基金
加拿大健康研究院; 加拿大自然科学与工程研究理事会;
关键词
Methane combustion; Pd catalysts; Silica encapsulation; Extended X-ray Absorption fine structure  (EXAFS); CORE-SHELL; PD; NANOPARTICLES; NANOCLUSTERS; SIZE; HYDROGENATION; EXAFS; REDUCTION; NANOTUBES; OXIDATION;
D O I
10.1016/j.cattod.2021.11.031
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Methane is the most abundant constituent of natural gas and it is difficult to fully oxidize without effective catalysts. Pd is recognized as the most efficient catalyst for the methane combustion reaction. However, few routes are available for the preparation of near-monodisperse Pd clusters for catalysis. Here we focused on the synthesis and activation of mercaptoundecanoic acid-protected Pd clusters (1.1 +/- 0.3 nm) and encapsulated them in a silica matrix using sol-gel chemistry. EXAFS analysis revealed that nearly complete removal of thiolate ligands at 250 degrees C in air leads to the partial oxidation of Pd clusters and that the clusters are completely oxidized to PdO at 650 degrees C. TEM and CO chemisorption studies suggest that silica coated Pd clusters are much more resistant to sintering than the control sample of Pd clusters deposited on silica spheres. The activity studies over silica-coated and non-coated catalysts for the methane combustion reaction indicate the presence of the silica shell on the Pd clusters significantly improves the catalytic activity.
引用
收藏
页码:223 / 229
页数:7
相关论文
共 50 条
  • [1] Highly monodisperse zirconia-coated silica spheres and zirconia/silica hollow spheres with remarkable textural properties
    Arnal, Pablo M.
    Weidenthaler, Claudia
    Schueth, Ferdi
    [J]. CHEMISTRY OF MATERIALS, 2006, 18 (11) : 2733 - 2739
  • [2] Selectivity as a Function of Nanoparticle Size in the Catalytic Hydrogenation of Unsaturated Alcohols
    Bhattacharjee, Somnath
    Dotzauer, David M.
    Bruening, Merlin L.
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (10) : 3601 - 3610
  • [3] A simple two-step method to synthesize the well-ordered mesoporous composite Ti-FDU-12 and its application in the hydrodesulfurization of DBT and 4,6-DMDBT
    Cao, Zhengkai
    Duan, Aijun
    Zhao, Zhen
    Li, Jianmei
    Wei, Yuechang
    Jiang, Guiyuan
    Liu, Jian
    [J]. JOURNAL OF MATERIALS CHEMISTRY A, 2014, 2 (46) : 19738 - 19749
  • [4] A Versatile Approach to the Synthesis of Functionalized Thiol-Protected Palladium Nanoparticles
    Cargnello, Matteo
    Wieder, Noah L.
    Canton, Patrizia
    Montini, Tiziano
    Giambastiani, Giuliano
    Benedetti, Alvise
    Gorte, Raymond J.
    Fornasiero, Paolo
    [J]. CHEMISTRY OF MATERIALS, 2011, 23 (17) : 3961 - 3969
  • [5] Two Growth Mechanisms of Thiol-Capped Gold Nanoparticles Controlled by Ligand Chemistry
    Chen, Xuelian
    Wei, Meng
    Jiang, Shaohua
    Foerster, Stephan
    [J]. LANGMUIR, 2019, 35 (37) : 12130 - 12138
  • [6] New Insights into the Chemistry of Thiolate-Protected Palladium Nanoparticles
    Corthey, Gaston
    Rubert, Aldo A.
    Picone, A. Lorena
    Casillas, Gilberto
    Giovanetti, Lisandro J.
    Ramallo-Lopez, Jose M.
    Zelaya, Eugenia
    Benitez, Guillermo A.
    Requejo, Felix G.
    Jose-Yacaman, Miguel
    Salvarezza, Roberto C.
    Fonticelli, Mariano H.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (17) : 9830 - 9837
  • [7] Selective butadiene hydrogenation by Pd nanoparticles deposed onto nano-sized oxide supports by CVD of Pd-hexafluoroacetylacetonate
    Dal Santo, Vladimiro
    Gallo, Alessandro
    Naldoni, Alberto
    Sordelli, Laura
    [J]. INORGANICA CHIMICA ACTA, 2012, 380 : 216 - 222
  • [8] Mercaptoundecanoic Acid Capped Palladium Nanoparticles in a SAPO 34 Membrane: A Solution for Enhancement of H2/CO2 Separation Efficiency
    Das, Jugal Kishore
    Das, Nandini
    [J]. ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (23) : 20717 - 20728
  • [9] Atomically Precise Noble Metal Nanoclusters as Efficient Catalysts: A Bridge between Structure and Properties
    Du, Yuanxin
    Sheng, Hongting
    Astruc, Didier
    Zhu, Manzhou
    [J]. CHEMICAL REVIEWS, 2020, 120 (02) : 526 - 622
  • [10] The support effect on the size and catalytic activity of thiolated Au25 nanoclusters as precatalysts
    Fang, Jun
    Li, Jingguo
    Zhang, Bin
    Yuan, Xun
    Asakura, Hiroyuki
    Tanaka, Tsunehiro
    Teramura, Kentaro
    Xie, Jianping
    Yan, Ning
    [J]. NANOSCALE, 2015, 7 (14) : 6325 - 6333