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Fabrication of amorphous Co–Cr–B and catalytic sodium borohydride hydrolysis for hydrogen generation

Published online by Cambridge University Press:  17 January 2020

Yuerong Chen  and
Huiming Jin
Yuerong Chen
Affiliation:
School of Mechanical Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
Huiming Jin*
Affiliation:
School of Mechanical Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
*
a)Address all correspondence to this author. e-mail: doctorjhm@163.com
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Abstract

Co–Cr–B amorphous catalysts have been synthesized by the chemical reduction method. Catalyst powders were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Brunner-Emmet-Teller measurements (BET). Catalytic performance of the catalyst was measured by the hydrolysis rate of the sodium borohydride solution. Results showed that the particle size of the catalyst was reduced with the addition of a small amount of Cr. The specific surface area increased significantly, and the performance of the catalyst was improved. However, excess addition of Cr caused excess oxides and Cr3+, covering the surface active sites of the catalyst, which degraded the performance of the catalyst. When the ratio of Cr/Co is 0.005, the catalyst performance was optimal and showed nearly 2 times higher H2 generation rate than that of pure Co–B catalyst. In addition, the effect of catalyst content, NaBH4 concentration, reaction temperature, and NaOH concentration on the hydrogen generation of NaBH4 solution was also studied.

Keywords

catalyticmicrostructureCr
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 3 , 14 February 2020 , pp. 281 - 288
Copyright
Copyright © Materials Research Society 2020

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