A COMPARATIVE STUDY FOR SODIUM BOROHYDRIDE DEHYDROGENATION AND ELECTROOXIDATION ON CERIUM AND COBALT CATALYSTS

Creative Commons License

Hansu T. A., Caglar A., Sahin Ö., Kivrak H.

INTERNATIONAL JOURNAL OF ECOSYSTEMS AND ECOLOGY SCIENCE-IJEES, cilt.10, sa.2, ss.389-400, 2020 (ESCI) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 10 Sayı: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.31407/ijees10.220
  • Dergi Adı: INTERNATIONAL JOURNAL OF ECOSYSTEMS AND ECOLOGY SCIENCE-IJEES
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), CAB Abstracts, Environment Index, Veterinary Science Database
  • Sayfa Sayıları: ss.389-400
  • Anahtar Kelimeler: Dehydrogenation, electrooxidation, Ce, Co, Sodium borohydride, FORMIC-ACID ELECTROOXIDATION, HYDROGEN GENERATION, PDAUCO CATALYSTS, CARBON-MONOXIDE, FOSSIL-FUELS, NANOPARTICLES, HYDROLYSIS, NI, OXIDATION, AU
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

In the present study, Co/CNT and Ce/CNT catalysts are prepared via sodium borohydride (NaBH4) reduction method. Co/CNT and Ce/CNT catalysts are examined to the dehydrogenation and electrooxidation of NaBH4. NaBH4 dehydrogenation activities of these Co/CNT and Ce/CNT catalysts are performed in alkaline environment. 5% Co/CNT catalyst exhibits superior hydrogen evolution compared with other catalysts. Activation energy is calculated using Arrhenius equation. Initial rate for this catalyst is found as 1700 ml H-2 g(cat)(-1) min(-1). As a result of the kinetic calculations, the activation energy of the catalyst is calculated as 44,68775 kj/mol. The degree of reaction (n) is found to be 0.5 by trial and error. In conclusion, 5% Co/CNT catalyst is a promising catalyst for hydrogen production from NaBH4. Cyclic voltammetry (CV) analysis is utilized to examine the electrochemical activity of the catalysts for NaBH4 electrooxidation. 0.1% Co/CNT catalyst has 0.38 mA cm(-2) (3181 mA mg(-1) Co) specific activity.