Highly Dispersed Nickel-Containing Mesoporous Silica with Superior Stability in Carbon Dioxide Reforming of Methane: The Effect of Anchoring

Materials

Wenjia Cai²  Lin Ye²  Li Zhang²  Yuanhang Ren²  Bin Yue¹  Xueying Chen² 

[1] Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China;

关键词: methane;    dry reforming;    Ni;    mesoporous silica;    anchoring effect;   

DOI  :  10.3390/ma7032340

来源: mdpi

【 摘 要 】

A series of nickel-containing mesoporous silica samples (Ni-SiO₂) with different nickel content (3.1%–13.2%) were synthesized by the evaporation-induced self-assembly method. Their catalytic activity was tested in carbon dioxide reforming of methane. The characterization results revealed that the catalysts, e.g., 6.7%Ni-SiO₂, with highly dispersed small nickel particles, exhibited excellent catalytic activity and long-term stability. The metallic nickel particle size was significantly affected by the metal anchoring effect between metallic nickel particles and unreduced nickel ions in the silica matrix. A strong anchoring effect was suggested to account for the remaining of small Ni particle size and the improved catalytic performance.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland