Quaternized polymeric microgels as metal free catalyst for H-2 production from the methanolysis of sodium borohydride

ŞAHİNER N., BÜTÜN ŞENGEL S.

JOURNAL OF POWER SOURCES, cilt.336, ss.27-34, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 336
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.jpowsour.2016.10.054
  • Dergi Adı: JOURNAL OF POWER SOURCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.27-34
  • Anahtar Kelimeler: Polymeric microgel/nanogel catalyst, H-2 production, Methanolysis via ionic liquid microgel/nanogel, PIL, NaBH4, IONIC LIQUID COLLOIDS, HYDROGEN GENERATION, CAPILLARY-ELECTROPHORESIS, VERSATILE USE, MIXTURES, HYBRIDS, SENSOR, NABH4, PEI
  • Eskişehir Osmangazi Üniversitesi Adresli: Hayır

Özet

Polymeric microgels derived from tris(2-amino ethyl)amine (TAEA) and glycerol diglycidyl ether as p(TAEA-co-GDE) via microemulsion polymerization techniques are protonated by 0.5 M HCl treatment as p(TAEA-co-GDE)-HCl). These microgels are then exposed to anion exchange reactions with differ ionic liquid forming salts, such as potassium thiocyanate (PTC), sodium dicyanamide (SDCA), ammonium hexafluorophosphate (AHFP), and sodium tetrafluoroborate (STFB) in aqueous medium for the preparation of p(TAEA-co-GDE) based ionic liquid colloidal microgels. These anions exchanged p(TAEA-co-GDE) ionic liquid colloids (ILCs) are directly used as catalyst for hydrogen (H-2) generation from the methanol solution of sodium borohydride (NaBH4). Various parameters affecting the H-2 production rate such as the catalyst types, NaBH4 amount, and the temperature are investigated. It is found that the methanolysis of NaBH4 catalyzed by p(TAEA-co-GDE)-HCl obeys the first order reaction kinetic. The activation energy, enthalpy and entropy of the protonated p(TAEA-co-GDE) microgels are calculated and found as the 30.37 kJ mol(-1), 27.96 kJ mol(-1), and -148.08 J mol(-1) K-1, respectively. Furthermore, the hydrogen generation rate of 3018 mL min(-1) g(-1) catalyzed by p(TAEA-co-GDE)-HCl catalyst is attained. (C) 2016 Elsevier B.V. All rights reserved.