Hydrogen Production in the Hydrolysis of NaBH₄ Using Bimetallic Co–Zn–B Catalyst Prepared by Combined Base Methods

Abstract

This study aims to produce hydrogen

an environmentally friendly energy carrier that contributes to the reduction of greenhouse gas emissions

through the hydrolysis of sodium borohydride (NaBH4) solution. Accordingly

Co–Zn–B nanomaterials supported by Lavandula stoechas extract were synthesized through the combined application of green synthesis and chemical reduction techniques. The structural and morphological properties of the synthesized materials were characterized using BET

XRD

FT-IR

and SEM–EDX analyses. The effects of parameters such as reaction temperature

catalyst amount

and NaBH4 and NaOH concentrations on the hydrogen generation rate were systematically investigated. The Zn/Co molar ratio was determined as 1:4

and under the optimum conditions (5% NaOH

1% NaBH4

0.02 g catalyst

and 30 °C)

the hydrogen generation rate and activation energy were calculated as 5675 mL min-1 g-1 and 18.49 kJ mol-1

respectively. In addition

the durability

reusability

and kinetic behavior of the catalyst at different temperatures were also examined. The obtained results demonstrate that Co–Zn–B nanocomposites possess strong potential for sustainable hydrogen production.