Highly active, robust and reusable micro-/mesoporous TiN/Si3N4 nanocomposite-based catalysts for clean energy: Understanding the key role of TiN nanoclusters and amorphous Si3N4 matrix in the performance of the catalyst system

Üniversitemiz öğretim üyelerinden Prof. Dr. Saim Özkar’ın yazarları arasında bulunduğu “Highly active, robust and reusable micro-/mesoporous TiN/Si3N4 nanocomposite-based catalysts for clean energy: Understanding the key role of TiN nanoclusters and amorphous Si₃N₄ matrix in the performance of the catalyst system” başlıklı makale Applied Catalysis B: Environmental’da yayınlandı.

Herein, we developed a precursor approach toward the design of a titanium nitride (TiN)/silicon nitride (Si₃N₄) nanocomposite with an activated carbon monolith as a support matrix forming a highly micro-/mesoporous component to be used as a Pt support for the catalytic hydrolysis of sodium borohydride (NaBH₄) as a model reaction. The experimental data demonstrated that the amorphous Si₃N₄ matrix, the strong Pt-TiN nanocluster interaction and the synergistic effects between the three components contributed to the improved performance of the catalyst system. Thus, the use of this TiN/Si₃N₄ nanocomposite allowed to significantly reducing the noble metal loading (only ∼1 wt% of Pt) for the complete and fast dehydrogenation of NaBH₄ under alkaline conditions at 80 °C. Additionally, the catalytic system displayed an excellent robustness and durability to offer reusability without collapsing and performance decrease under the harsh conditions imposed by the reaction.

Lale, A., Mallmann, M. D., Tada, S., Bruma, A., Özkar, S., Kumar, R., . . . Bernard, S. (2020). Highly active, robust and reusable micro-/mesoporous TiN/Si3N4 nanocomposite-based catalysts for clean energy: Understanding the key role of TiN nanoclusters and amorphous Si3N4 matrix in the performance of the catalyst system. Applied Catalysis B: Environmental, 272 doi:10.1016/j.apcatb.2020.118975

Makaleye erişim için: https://www.sciencedirect.com/science/article/abs/pii/S0926337320303908?via%3Dihub

Anahtar sözcükler:
Catalytic support; Hydrogen generation; Nitride; Sodium borohydride

Diğer Yazarlar:
Lale, A., Mallmann, M.D., Tada, S., Bruma, A., Kumar, R., Haneda, M., Francisco Machado, R.A., Iwamoto, Y., Demirci, U.B. & Bernard, S.

Ek Bilgiler:
The authors gratefully acknowledge the financial contribution from CEFIPRA agency (project N°5108-1). The authors thank Dr. Xavier Deschanels and Dr. Johan Alauzun for elemental analyses. Dr. Samuel Bernard and Prof. Ricardo Machado acknowledge the CNPq for providing financial support for the PhD thesis of Maira Mallmann. Dr Samuel Bernard and Prof. Yuji Iwamoto would like to thank CNRS who financially supported present work via the International Research Project (IRP) 'Ceramics materials for societal challenges'.