Highly active nanoporous Co-B-TiO2 framework for hydrolysis of NaBH4

被引:59
作者
Cheng, Jun [1 ]
Xiang, Cuili [1 ]
Zou, Yongjin [1 ]
Chu, Hailiang [1 ]
Qiu, Shujun [1 ]
Zhang, Huanzhi [1 ]
Sun, Lixian [1 ]
Xu, Fen [1 ]
机构
[1] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
基金
美国国家科学基金会;
关键词
TiO2; Nanocomposite; Nanoporous framework; Hydrogen generation; SODIUM-BOROHYDRIDE HYDROLYSIS; HYDROGEN GENERATION; CO-B; CATALYTIC HYDROLYSIS; GAS-STORAGE; PERFORMANCE; FOAM; DEHYDROGENATION; TEMPERATURE;
D O I
10.1016/j.ceramint.2014.09.007
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this study, a nanoporous Co-B-TiO2 framework was prepared by in-situ chemical reduction under sonication. After the introduction of nano-TiO2 particles to a Co-B alloy, the specific surface area of the composite was substantially improved from 47.2 to 89.6 m(2)/g. The morphology was also changed from aggregated nanoparticles to a nanoporous framework. Furthermore, the catalytic activity was significantly enhanced for the hydrolysis of NaBH4. A high rate of hydrogen generation was found at 1980 mLmin(-1) g(-1) at 30 degrees C in a5 wt% NaOH+ 1.5 wt% NaBE4 solution, and the rate was much faster than those obtained with undoped Co-B catalysts. The activation energy of the hydrolysis was 30.93 kJ/mol, which is comparable to that of noble metal-based catalysts. The stability of the fabricated composite catalyst was also explored. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:899 / 905
页数:7
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