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.