Ruthenium and Platinum-Modified Titanium Dioxide Support for NaBH<sub>4</sub> Hydrolysis
Çiğdem Tuç Altaf, В. Г. Минкина, S. I. Shabunya, Tuluhan Olcayto Çolak, Nurdan Demirci Sankır, Mehmet Sankır, Vladimir I. Kalinin
Abstract
High Resolution Image Download MS PowerPoint Slide Highly stable platinum (Pt) and ruthenium (Ru)-based catalysts on titanium oxide (TiO 2 ) nanoparticle support were prepared. The productivity of hydrogen generation from sodium borohydride (NaBH 4 ) hydrolysis was observed to be as high as 95%. The activation energies for the hydrolysis reaction in the presence of Ru/TiO 2 in aqueous and alkaline solutions were 62.00 and 64.65 kJ mol –1, respectively. On the other hand, the activation energy value of the hydrolysis reaction with the Pt/TiO 2 catalyst decreased from 60.5 to 53.2 kJ mol –1, and the solution was changed from an aqueous to an alkaline medium. The experimental results have indicated that NaOH concentration (ranging from 0.5 to 2 M) affected the hydrogen generation rate (HGR) differently for both metals on the TiO 2 support. Consequently, the HGR of the hydrolysis reaction in the presence of the Ru/TiO 2 catalyst decreased with increasing NaOH concentration, whereas the Pt/TiO 2 catalyst efficiency increased with increasing NaOH concentration.