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金属学报  2014, Vol. 50 Issue (6): 762-768    DOI: 10.3724/SP.J.1037.2013.00662
  论文 本期目录 | 过刊浏览 |
泡沫SiC负载钴基结构化催化剂的制备及其催化性能*
杨晓丹, 姜春海, 杨振明, 张劲松
(中国科学院金属研究所, 沈阳 110016)
PREPARATION AND CATALYTIC PROPERTIES OF SiC FOAM SUPPORTED Co-BASED STRUCTURED CATALYSTS
YANG Xiaodan, JIANG Chunhai, YANG Zhenming, ZHANG Jinsong
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
全文: PDF(2462 KB)   HTML
摘要: 

以氨酚醛树脂为黏合剂, 将掺Al的Co3O4粉末负载在SiC泡沫上, 再经H2还原制备出SiC负载的钴基结构化催化剂. 采用XRD, SEM, N2吸附-脱附和H2吸附等手段, 研究了还原温度对涂层中Co晶粒的大小、相转化、微观结构以及吸附特性的影响, 并以NaBH4水解放氢反应为探针反应, 研究了不同条件下制备的钴基结构化催化剂的催化活性. 结果表明, 随着还原温度的升高, 泡沫SiC表面涂层中活性组分Co的颗粒尺寸不断增大, 结晶性增强. 在120 ℃时, 活性组分颗粒表面的H2化学等温吸附量随着还原温度的升高而降低, 其催化活性也呈现降低趋势. 当还原温度为400 ℃时, 其催化NaBH4水解放氢的速率最大, 可达48.38 mL/(g·min).

关键词 结构化催化剂硼氢化钠水解    
Abstract:Co-based structured catalysts were prepared by coating Al-doped Co3O4 powder on SiC foam support using phenolic resin as the adhesion agent, followed by H2 reduction at moderate temperatures. XRD, SEM, N2 adsorption-desorption and H2 adsorption measurement were used to characterize the evolution of crystalline size of Co particles, morphology and phase assemblage of the coatings and the H2 adsorption capacities of the structured catalysts obtained at different reduction temperatures. The catalytic properties of the prepared Co-based structured catalysts were evaluated by taking the hydrolysis of NaBH4 as the model hydrogen generation reaction. Growing of the active Co particles in the coating as accompanied by the increase of crystallinity was observed with the increase of reduction temperature, which resulted in decreased chemical adsorption capacity of H2 at 120 ℃ and catalytic activity towards hydrogen generation rate. The highest hydrogen generation rate of 48.38 mL/(g·min) was achieved at the reduction temperature of 400 ℃.
Key wordsstructured    catalyst    sodium borohydride    hydrolysis
收稿日期: 2013-10-21     
ZTFLH:  TQ138  
Corresponding author: ZHANG Jinsong, professor, Tel: (024)23971896, E-mail: jshzhang@imr.ac.cn   
作者简介: 杨晓丹, 女, 1981年生, 博士生

引用本文:

杨晓丹, 姜春海, 杨振明, 张劲松. 泡沫SiC负载钴基结构化催化剂的制备及其催化性能*[J]. 金属学报, 2014, 50(6): 762-768.
YANG Xiaodan, JIANG Chunhai, YANG Zhenming, ZHANG Jinsong. PREPARATION AND CATALYTIC PROPERTIES OF SiC FOAM SUPPORTED Co-BASED STRUCTURED CATALYSTS. Acta Metall Sin, 2014, 50(6): 762-768.

链接本文:

https://www.ams.org.cn/CN/10.3724/SP.J.1037.2013.00662      或      https://www.ams.org.cn/CN/Y2014/V50/I6/762

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