Chinese Science Bulletin, Volume 60 , Issue 33 : 3230-3238(2015) https://doi.org/10.1360/N972015-00950

Particle size effect and structure-function relationship of Ni-based steam reforming catalysts

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  • ReceivedAug 19, 2015
  • AcceptedSep 30, 2015
  • PublishedNov 20, 2015


This paper describes the structure-function relationship between the particle size and the activity and stability of Ni based steam reforming catalysts. Based on a modified Stöber method, the particle size of Ni@SiO2 core-shell catalysts can be finely controlled. By exploring Ni@SiO2 core-shell catalysts with different Ni particle sizes, it is found that the turnover frequency (TOF) of ethanol increase with increasing Ni particle size, reaching a maximum after Ni particles are larger than 30 nm. The particle size of Ni also affects the stability of the catalyst. With larger Ni particle size, a more pronounced coking is observed, jeopardizing the stability of the catalyst. Our study shows that an appropriate Ni particle size is critical to the activity and stability of steam reforming catalysts.



图S1 Ni@SiO2催化剂N2吸附等温线

图S2 Ni@SiO2催化剂孔分布曲线图

图S3 NiO@SiO2催化剂的TEM图

图S4 反应后Ni@SiO2催化剂的TEM图

图S5 Ni@SiO2催化剂TG, DTG曲线分析图

图S6 反应后Ni@SiO2催化剂拉曼光谱图

表S1 反应后Ni@SiO2催化剂物化性质

表S2 拉曼光谱分析表

本文以上补充材料见网络版csb.scichina.com. 补充材料为作者提供的原始数据, 作者对其学术质量和内容负责.


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