Kinetic Evaluation and Fabrication of Co–Fe–B Catalyst in Ethanol for Rapid Hydrogen Production From Sodium Borohydride
Year: 2026
Type: article
Abstract: In this study, Co–Fe–B catalysts were synthesized separately in ethanol and aqueous media under ambient conditions using a chemical reduction–precipitation method for rapid and efficient hydrogen generation from sodium borohydride (NaBH 4 ) hydrolysis. The structural and morphological properties of the synthesized catalysts were characterized by SEM‐EDX and XRD analyses. The results demonstrated that the synthesis medium had a significant influence on the catalytic performance. At 30 °C, the hydrogen generation rate of the Co–Fe–B catalyst synthesized in ethanol reached 13,021.6 mL gcat −1 min −1 , whereas the catalyst synthesized in water exhibited a hydrogen generation rate of 4005 mL gcat −1 min −1 under the same conditions. The hydrogen generation rate increased with increasing temperature, catalyst amount, and NaBH 4 concentration. The reaction order was determined to be approximately 0.9, and the activation energy of the highly active catalyst was calculated as 37.72 kJ mol −1 using the Arrhenius equation. The enhanced catalytic activity of the catalyst synthesized in ethanol was attributed to the formation of a larger active surface area and electron transfer from boron to the active Co and Fe sites. These findings reveal that the synthesis medium plays a critical role in determining the structural properties and hydrogen generation performance of Co–Fe–B catalysts.
Source: ChemPhysChem
DOI: 10.1002/cphc.70553
Authors: Mehmet Salih Keskin, Mehmet Salih Ağırtaş
Institutions: Siirt Üniversitesi, Van Yüzüncü Yıl Üniversitesi
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7204800670