Hydrogen generation from hydrolysis of NaBH4 based on high stable NiB/NiFe2O4 catalyst

Autor: Xin Xia, Fang Li, Qiming Li, Liang Zhihua, Shiduo Zhao
Rok vydání: 2017
Předmět:
Zdroj: International Journal of Hydrogen Energy. 42:3971-3980
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2016.10.115
Popis: Recently environment-friendly hydrogen generation for NaBH4 hydrolysis using improved method has attracted much attention. Here a novel catalyst NiB/NiFe2O4 was developed through an impregnation-chemical reduction method, which was utilized in hydrogen production from NaBH4 hydrolysis. In this study, NiFe2O4 ferrite supports were prepared via a combined EDTA-citric acid complexing method. NiFe2O4 ferrites were characterized in terms of phase structure and surface morphologies using X-ray diffractometer as well as scanning electron microscopes. It can be found that the particle size of NiFe2O4 calcined at 873 K is about 30–40 nm which exhibits an optimized spherical morphologies. The factors such as active metal loading amount, reaction temperature and recycling number on NiB/NiFe2O4 catalyst were investigated in detail. A hydrogen generation rate as high as 299.88 ml min−1 g−1 for NiB/NiFe2O4 catalyst can be achieved using 5wt.% NaBH4 solution at 298 K which is much higher than pure NiB. Moreover, an improved recycling stability can be obtained for supported NiB/NiFe2O4 catalyst. The 83.3% of initial catalytic activity can be retained for NiB/NiFe2O4 catalyst after the fifth run. The experimental results show that the usage of NiFe2O4 support can enhance the catalytic activity and recycling stability of NiB active metals.
Databáze: OpenAIRE
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