Hydrogen production via methanolysis of sodium borohydride using La<sub>2</sub>O<sub>3</sub> and La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> nanowire catalysts

Yildirim H., ENGİNTEPE E., AKIN A. N., Duman S.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.218, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 218
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.ijhydene.2026.154024
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Chemical Abstracts Core, Chimica, Compendex, Environment Index, INSPEC
  • Kocaeli Üniversitesi Adresli: Evet

Özet

Catalyst design is of great importance for hydrogen production from solid hydrogen storage materials such as NaBH4. For this purpose, lanthanum-based La2O3 and La2O2CO3 nanowire catalysts were synthesized via a hydrothermal method, followed by calcination at different temperatures (700 degrees C and 500 degrees C, respectively) to obtain the desired crystalline phases. Their activities in NaBH4 solvolysis were then investigated. Accordingly, La2O2CO3 nanowire catalyst catalyzed NaBH4 methanolysis 3.4 times faster than the other reactions, exhibiting the highest hydrogen production rate at 0.5 min (HPR0.5m, 6939 mLH2/(gcat*min)) and equivalent H2 (4.03) values. Kinetic studies of NaBH4 methanolysis in the presence of the La2O2CO3 nanowire catalyst calculated the activation energy as 32.09 kJ/mol. Furthermore, even after 3 months of isolation, the reused La2O2CO3 nanowire catalyst retained 76.67% of its catalytic activity. All findings indicate that La2O3 and La2O2CO3 nanowire catalysts significantly increase hydrogen production efficiency, highlighting their potential for practical application in clean energy and hydrogen storage technologies.