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Functional hyper-crosslinked polymers as advanced materials for hydrogen generation via sodium borohydride methanolysis   
Yazarlar (5)
Dr. Öğr. Üyesi Kutalmış GÖKKUŞ Dr. Öğr. Üyesi Kutalmış GÖKKUŞ
Kastamonu Üniversitesi, Türkiye
Aysegul Ozbal
Eskişehir Osmangazi Üniversitesi, Türkiye
Prof. Dr. Mahmut GÜR Prof. Dr. Mahmut GÜR
Kastamonu Üniversitesi, Türkiye
S. Alper Akalin
Dokuz Eylül Üniversitesi, Türkiye
Vural Bütün
Eskişehir Osmangazi Üniversitesi, Türkiye
Devamını Göster
Özet
Air pollution caused by fossil fuels is the biggest problem humanity has ever created, and clean energy sources like hydrogen are seriously needed to solve it. Therefore, in this study, four phenanthrene-based hyper-crosslinked polymers (PTHCP-1–4) were synthesized via Friedel–Crafts alkylation and characterized by FTIR, BET, SEM, XPS, TGA, and zeta potential measurements. The BET surface areas ranged from 518.9 to 908.8 m2 g-1, with PTHCP-4 showing the highest value, while pore volumes varied between 0.24 and 1.60 cm3 g-1. SEM revealed uniform nanoscale particles for PTHCP-2 (mean size 54 nm) and aggregated morphologies for PTHCP-3/4. XPS confirmed incorporation of pyridinic-N (399.3 eV) and phenolic –OH groups, and TGA demonstrated high thermal stability with main degradation above 400 °C. Zeta potentials shifted from +36.3 mV (PTHCP-3) or −6.48 mV (PTHCP-1) to more negative values after reaction, indicating surface interaction with BH4- species. Catalytic tests showed hydrogen generation rates (HGR) up to 34600 mL H2 min-1 gcat-1 (PTHCP-3) with the lowest activation energy (27.22 kJ mol-1). PTHCP-4 retained 95 % of its activity after five cycles, confirming excellent reusability. These results highlight the synergy between surface area, pore structure, and heteroatom functionality in optimizing metal-free catalysts for NaBH4 methanolysis.
Anahtar Kelimeler
Energy applications | Functional porous materials | H2 generation | Hyper-crosslinked polymers | Surface chemistry
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Materials Science and Engineering B
Dergi ISSN 0921-5107 Wos Dergi Scopus Dergi
Dergi Grubu Q2
Makale Dili İngilizce
Basım Tarihi 01-2026
Cilt No 323
Sayı 1
Doi Numarası 10.1016/j.mseb.2025.118863