One-Pot Synthesis of Ordered Mesoporous NiSiAl Oxides for Catalyzing CO2 Reforming of CH4

被引：15

作者：

Xiang, Xianmei ^{[1
,2
]}

Zhao, Huahua ^{[1
]}

Yang, Jian ^{[1
]}

Zhao, Jun ^{[1
]}

Yan, Liang ^{[1
]}

Song, Huanling ^{[1
]}

Chou, Lingjun ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2016年 / 21期

基金：

中国国家自然科学基金;

关键词：

Mixed oxides; Mesoporous materials; Doping; Nickel; Carbon dioxide; SUPPORTED RHODIUM CATALYSTS; CARBON-DIOXIDE; SYNTHESIS GAS; METAL-OXIDES; NICKEL-CATALYSTS; COMPOSITE OXIDES; METHANE; NI; ALUMINA; DEACTIVATION;

D O I：

10.1002/ejic.201600463

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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 CO2 reforming of CH4 indicated that the NiSiAl exhibited higher catalytic activity and stability over 100 h at 700 degrees C than NiAl. The enhanced performance results from the high thermal stability induced by Si doping, which hinders the Al2O3 phase transformation from amorphous to gamma-Al2O3; 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 degrees C, 200 h), NiSiAl-0.10 retained its amorphous Al2O3 structure and showed outstanding durability, almost without any deactivation.

引用

页码：3396 / 3404

页数：9

共 52 条

[1] Utilisation of CO2 as a chemical feedstock:: opportunities and challenges [J].