Hydrogen generation via hydrolysis of sodium borohydride using Ni-B metallic nanocatalyst supported on corncob

Articles in Press

Document Type : Research Article

Authors

1 Department of Chemical Engineering, University of Guilan, Rasht, Iran

2 Department of Chemical Engineering, University of Guilan, Rasht, 41996-13776, Iran

Abstract

Catalytic hydrolysis of sodium borohydride (NaBH4) can be considered an effective and reliable approach for producing stable hydrogen as a clean fuel source. In this study, Ni-B metallic catalysts supported on corncob were prepared using the electroless plating method. It was observed that the pH of the electroless solution has a significant impact on the hydrogen production performance. The characteristics of the catalysts prepared using various methods, such as XRD, FE-SEM, EDS/mapping, and ICP-OES, were investigated. Based on the results obtained, the Ni-B metallic nanocatalyst with smaller particle size showed the best performance at pH=1. Its hydrogen generation rate was calculated as 401.06 mL/min.gr. Kinetic studies conducted indicate that the catalytic hydrolysis of sodium borohydride follows zero-order kinetics with respect to the concentration of sodium borohydride and first-order kinetics concerning the catalyst amount. The activation energy for this catalytic reaction was calculated as 55.54 KJ/mol. Furthermore, based on thermodynamic calculations, the activation enthalpy and activation entropy were determined to be 53.26 KJ/mol and -0.1 KJ/K.mol, respectively. After three reuse cycles, the Ni-B metallic nanocatalyst demonstrated good stability in the sodium borohydride alkaline solution.

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Nashrieh Shimi va Mohandesi Shimi Iran

Articles in Press, Accepted Manuscript
Available Online from 16 March 2024

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