Chemical Hydride Hydrolysis For H₂ Production Via Co, Cu, Ni Metal Nanoparticles Prepared Within P(4-VP) Capsules

Title:Chemical Hydride Hydrolysis For H₂ Production Via Co, Cu, Ni Metal Nanoparticles Prepared Within P(4-VP) Capsules

Volume: 1 Issue: 1

Author(s): Nurettin Sahiner, Alper O. Yasar and Nahit Aktas

Affiliation:

Keywords: Nanogel/microgel, P(4-VP) capsules, microgel-M composites, H₂ production, BH₃NH₃/NaBH₄, hydrolysis.

Abstract: Poly(4-Vinyl pyridine) (p(4-VP)) and poly(4-Vinyl pyridine)-silica (p(4-VP)-S) were synthesized using micro emulsion polymerization. A capsule of p(4-VP) (cap-p(4-VP)) was prepared from p(4-VP)-S by removing silica moieties via HF treatment. Metal nanoparticles (MNPs) such as Co, Cu and Ni were prepared within the prepared polymeric particles, and tested for their catalytic performances in the hydrolysis of sodium borohydride (NaBH₄) and ammonium borane (BH₃NH₃). Furthermore, the hydrolysis reactions were evaluated for various parameters such as MNP types as catalysts, morphology of support materials, the extent of NaOH, temperature, and the amounts of MNPs. It was found that cap-p(4- VP) containing Co nanoparticles as cap-p(4-VP)-Co provided better catalytic performances, and used to determine the activation energy (E_a), the enthalpy (ΔH), and the entropy (ΔS) for the NaBH4 hydrolysis reaction, and were found to be 23.38 ± 2.8 kJ mol^-1, 20.26 ± 2.8 kJ mol^-1, and -158.8 ± 8.6 kJ mol^-1 K^-1, respectively. The Hydrogen Generation Rate (HGR) and Turn Over Frequency (TOF) values were calculated 5.57 L H₂ (g of catalyst min)^-1 and 13.13 mol H₂ (mol catalyst min)^-1 for the hydrolysis of NaBH₄ catalyzed by cap-p(4-VP)-Co. The BET surface areas of the particles were also measured and estimated as 18.86 m² g-1, 24.64 m2 g^-1and 52.89 m² g^-1 for p(4-VP), p(4-VP)-S and cap-p(4-VP) particles, respectively.

Cite this article as:

Sahiner Nurettin, O. Yasar Alper and Aktas Nahit, Chemical Hydride Hydrolysis For H₂ Production Via Co, Cu, Ni Metal Nanoparticles Prepared Within P(4-VP) Capsules, Current Nanomaterials 2016; 1 (1) . https://dx.doi.org/10.2174/2405461501666160323005226