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Promoting Effect of KIT‐6 to Support Ni‐Ce 0.8 Gd 0.2 O 2‐ δ as Efficient Coke‐Resistant Catalysts for Carbon Dioxide Reforming of Methane
Author(s) -
Xiang Xianmei,
Zhao Huahua,
Yang Jian,
Zhao Jun,
Yan Liang,
Song Huanling,
Chou Lingjun
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201901103
Subject(s) - catalysis , chemistry , x ray photoelectron spectroscopy , nickel , mesoporous material , nuclear chemistry , non blocking i/o , oxygen , coke , analytical chemistry (journal) , chemical engineering , chromatography , organic chemistry , engineering
A series of Ni‐Ce 0.8 Gd 0.2 O 2‐ δ /KIT‐6 composites with various mass ratios were prepared by the impregnation approach. TEM and XRD characterization results revealed that the KIT‐6 support improved the distribution of Ni‐Ce 0.8 Gd 0.2 O 2‐ δ nanoparticles through the confinement effect of ordered mesopores of KIT‐6. XPS measurement showed that the concentration of surface oxygen vacancies in Ni‐Ce 0.8 Gd 0.2 O 2‐ δ /KIT‐6 composite was higher than that in KIT‐6‐free Ni‐Ce 0.8 Gd 0.2 O 2‐ δ . The catalytic test toward CO 2 reforming of CH 4 indicated that the Ni‐Ce 0.8 Gd 0.2 O 2‐ δ /KIT‐6 exhibited higher catalytic activity and stability over 100 h at 700 °C than Ni‐Ce 0.8 Gd 0.2 O 2‐ δ . The enhanced performance was demonstrated to be due to improved nickel dispersion and higher concentration of oxygen vacancies in Ni‐Ce 0.8 Gd 0.2 O 2‐ δ /KIT‐6, which reinforced the catalytic activity and decoking ability in the reforming reaction, thus boosting the durability of the catalyst.