Al2O3 SUPPORTED Co-Cu-B (Co-Cu-B/Al2O3) CATALYST FOR HYDROGEN GENERATION BY HYDROLYSIS OF AQUEOUS SODIUM BOROHYDRIDE (NaBH4) SOLUTIONS


Baytar O., Izgi M. S. , Horoz S., Sahin Ö., Nar S.

DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES, vol.14, no.3, pp.673-681, 2019 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 3
  • Publication Date: 2019
  • Journal Name: DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.673-681
  • Keywords: Activation energy, Catalyst, Characterization, Hydrolysis, Synthesis, AREA ACTIVATED CARBON, CHEMICAL ACTIVATION, SURFACE-AREA
  • Istanbul Technical University Affiliated: No

Abstract

In this study, Al2O3 supported Co-Cu-B (Co-Cu-B/Al2O3) catalyst was synthesized by chemical impregnation and precipitation method to be used for catalytic hydrogen generation from NaBH4. Co-Cu-B/Al2O3 catalyst was synthesized at various ratios using Co-Cu-B/Al2O3 (5-20%). The effect of some parameters such as NaOH concentration (0-7%), NaBH4 concentration (2.5-7.5%), catalyst amount (25-150 mg) and solution ambient temperature was investigated on the catalytic hydrolysis of NaBH4 . The hydrogen generation rate was found as 2519 and 8962 mL*g(-1)*min(-1) for Co-Cu-B and Co-CuB/Al2O3 catalysts in NaBH4 hydrolysis, respectively. The order rate kinetics and activation energy for Co-Cu-B/Al2O3 catalyst were determined as 0.125 and 27 kJ*mol(-1), respectively. The obtained results suggest that Co-Cu-B/Al2O3 catalysts can be used for mobile applications of PEMFC systems.