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7728192 
Journal Article 
Metal-free pyridinium-based polymeric ionic liquids as catalyst for H-2 generation from NaBH4 
Sahiner, N; Yasar, AO; Aktas, N 
2017 
1 
Renewable Energy
ISSN: 0960-1481 
Elsevier Ltd 
101 
1005-1012 
English 
WOS:000388775700091 
Monodispersed poly(2-vinyl pyridine) (p(2-VP)) polymeric particles were synthesized with a self-emulsion polymerization (SEP) technique. Polymeric ionic liquid (PIL) particles such as poly(2-vinyl pyridine)-ethane (p(2-VP)++C2), poly(2-vinyl pyridine)-butane (p(2-VP)++C4), and poly(2-vinyl pyridine)-hexane (p(2-VP)++C6) particles were then prepared from monodispersed p(2-VP) particles by modifying with 1,2-dibromobutane (DBE) 1,4-dibromobutane (DBB) and 1,6-dibromobutane (DBH), respectively. The hydrodynamic diameter of the prepared particles was found be in the range of 350–400 nm, and the zeta potential of p(2-VP)++Cn (n: 2, 4 and 6) particles were found to be in the range of 26–28 mV. The prepared PIL particles (p(2-VP)++C6 etc.) were shown to be very effective catalysts in H2 generation by methanolysis of NaBH4. Various parameters, such as the effect of modifying agents on PIL particle, the amount of PIL particles, the amount of NaBH4 and temperature, affecting the H2 production rate were investigated. Hydrogen generation rate (HGR) was calculated as 5433 ± 141 mL H2 g−1 min−1 for 50 mg p(2-VP)++C6 particles in the methanolysis of 500 mM NaBH4. The activation energy (Ea) of methanolysis of NaBH4 catalyzed by p(2-VP)++C6 particles was calculated as 20.84 ± 0.76 kJ mol−1, which is much lower than similar studies reported in the literature. © 2016 Elsevier Ltd 
Microgel/nanogel; Polymeric ionic liquid catalyst; H-2 production; Monodispersed p(2-VP); Polymeric ionic liquid p(2-VP); Hydrolysis/methanolysis of NaBH4