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

Abstract

This study aims to produce hydrogenan environmentally friendly energy carrier that contributes to the reduction of greenhouse gas emissionsthrough the hydrolysis of sodium borohydride (NaBH4) solution. AccordinglyCo–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 BETXRDFT-IRand SEM–EDX analyses. The effects of parameters such as reaction temperaturecatalyst amountand NaBH4 and NaOH concentrations on the hydrogen generation rate were systematically investigated. The Zn/Co molar ratio was determined as 1:4and under the optimum conditions (5% NaOH1% NaBH40.02 g catalystand 30 °C)the hydrogen generation rate and activation energy were calculated as 5675 mL min-1 g-1 and 18.49 kJ mol-1respectively. In additionthe durabilityreusabilityand 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.