Akademik Veri Yönetim Sistemi
Doktora Sonrası Araştırma Programı Projesi, 2024 - 2025
In
this study, polypyrrole (PPy), polyaniline (PANI) and their modified forms with
metals were prepared and investigated as catalyst supports for hydrogen
generation. Because catalytic activities very low when Fe, Co, Cu and Ni metals
incorporated to the PPy and PANI, the effect of Pt was investigated. Catalytic
activities of PANI based catalysts were very low, so PPy based polymers were
modified by incorporating of Pt into PPy, PPy-MMT, and PPy-BNT. The structural
modification of the polymers and the successful incorporation of platinum were
confirmed by various characterization techniques, including atomic absorption
spectroscopy (AAS), which indicated that almost all of the Pt precursor salt
was reduced to its metallic state. Furthermore, it was calculated that the
polymers contained approximately 6% by weight of Pt, verifying the high loading
efficiency of the preparation method. The chromatographic analyses presented in
Figures 13, 14, and 15 demonstrated the representative profiles of the Pt-based
catalysts. These results support the conclusion that the prepared nanocomposite
catalysts exhibited unique structural and functional features depending on the
type of support material. In particular, the incorporation of montmorillonite
(MMT) and bentonite (BNT) into the PPy matrix provided enhanced surface area
and improved dispersion of Pt nanoparticles, which are critical factors in
achieving higher catalytic activity. Among the tested catalysts, PPy-MMT-Pt and
PPy-BNT-Pt showed promising performance, suggesting that clay-based supports
can play a significant role in improving the efficiency and stability of
conducting polymer–metal systems. From a broader perspective, the study
underlines the importance of combining conducting polymers with Pt metal
nanoparticles and inorganic supports for sustainable energy applications.
Hydrogen is considered a clean and renewable energy carrier, and the
development of cost-effective, durable, and efficient catalysts is one of the
most critical challenges in the field. While noble metals such as Pt are known
for their excellent catalytic performance, their high cost and scarcity limit
large-scale applications. Therefore, designing advanced catalyst architectures
that maximize the utilization of Pt while enhancing activity through
synergistic effects with polymeric and inorganic components is of great
significance. The findings of this study also highlight the potential of
PPy-based materials as versatile catalyst supports. PPy provides electronic
conductivity, stability, and the ability to interact with metal ions, making it
a suitable platform for catalytic systems. The modification with layered
silicate materials such as MMT and BNT not only improves mechanical and
structural properties but also introduces additional sites for Pt anchoring and
dispersion. As a result, the hybrid catalysts present an improved balance
between activity, stability, and material cost. In conclusion, the work
presented here demonstrates that Pt-modified polypyrrole and its clay-based
composites are effective materials for hydrogen production. The successful
synthesis, structural confirmation, and performance evaluation of these
catalysts contribute valuable insights into the design of next-generation
electrocatalysts. Nevertheless, further studies are needed to optimize
preparation conditions, reduce Pt loading without compromising activity, and
explore long-term stability under real operating conditions. Additionally,
future research could focus on replacing or partially substituting Pt with more
abundant and less expensive transition metals, while maintaining synergistic
effects within the polymeric matrix. Overall, the study provides a solid
foundation for future research in catalyst development for hydrogen generation.
The results clearly show that hybrid materials based on conducting polymers,
noble metals, and inorganic supports can significantly contribute to the
advancement of sustainable energy technologies. With continued investigation
and optimization, such systems have the potential to bridge the gap between
laboratory-scale research and practical industrial applications, thereby
accelerating the transition to a hydrogen-based energy economy.