Micro poly(3-sulfopropyl methacrylate) hydrogel synthesis for in situ metal nanoparticle preparation and hydrogen generation from hydrolysis of NaBH4


Turhan T., Guvenilir Y. A., ŞAHİNER N.

ENERGY, cilt.55, ss.511-518, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.energy.2013.01.035
  • Dergi Adı: ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.511-518
  • Anahtar Kelimeler: Hydrogel composite reactor, H-2 production, NaBH4 hydrolysis at low temperature, COBALT(0) NANOCLUSTERS CATALYST, SODIUM-BOROHYDRIDE, AMMONIA-BORANE, CO, REACTOR, NI, WATER, NITROPHENOLS, COMPOSITES, REDUCTION
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Polymeric hydrogels derived from SPM (3-sulfopropyl methacrylate) of micrometer size were used in the preparation of a composite-catalyst system for hydrogen generation from hydrolysis of NaBH4. In situ Co and Ni nanoparticles were prepared by chemical reduction of absorbed Co (H) and Ni (II) ions inside the hydrogel networks, and the whole composite was used as a catalyst system. The catalytic activity of the metal nanoparticles within the p(SPM) hydrogel matrix was better and faster using Co than with Ni. Additionally, other parameters that affect the hydrogen generation rate, such as temperature, metal reloading, the catalyst amounts as well as reusability, were also investigated. It was found that p(SPM)-Co micro hydrogels were even effective for hydrogen generation at 0 degrees C with a hydrogen generation rate of 966 (mL H-2) (min)(-1) (g of Co)(-1). The activation energy, activation enthalpy, and activation entropy for the hydrolysis reaction of NaBH4 with micro p(SPM)-Co catalyst system were calculated as 44.3 kJ/mol, 43.26 kJ/mol K, and -150.93 J/mol K, respectively. (C) 2013 Elsevier Ltd. All rights reserved.