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One‐Pot Synthesis of Ordered Mesoporous NiSiAl Oxides for Catalyzing CO 2 Reforming of CH 4
Author(s) -
Xiang Xianmei,
Zhao Huahua,
Yang Jian,
Zhao Jun,
Yan Liang,
Song Huanling,
Chou Lingjun
Publication year - 2016
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.201600463
Subject(s) - mesoporous material , nial , amorphous solid , catalysis , chemical engineering , nanoparticle , chemistry , thermal stability , phase (matter) , amorphous carbon , evaporation , nanotechnology , materials science , crystallography , intermetallic , organic chemistry , alloy , physics , engineering , thermodynamics
Ordered mesoporous NiSiAl composite oxides with an amorphous phase were prepared by an improved evaporation‐induced self‐assembly strategy. The silica was distributed homogeneously in the mesoporous skeleton and improved the ordered mesoporous structure of NiAl. Catalytic tests toward the CO 2 reforming of CH 4 indicated that the NiSiAl exhibited higher catalytic activity and stability over 100 h at 700 °C than NiAl. The enhanced performance results from the high thermal stability induced by Si doping, which hinders the Al 2 O 3 phase transformation from amorphous to γ‐Al 2 O 3 ; therefore, the uniform dispersion of the Ni nanoparticles is retained owing to the confinement effect of the ordered mesopores. The stabilized Ni nanoparticles reinforced the resistance of the catalyst to carbon deposition and, thus, boosted its durability. Notably, even under more stringent conditions (750 °C, 200 h), NiSiAl‐0.10 retained its amorphous Al 2 O 3 structure and showed outstanding durability, almost without any deactivation.