Synthesis of yolk-shell (fullerene-metal) nanostructures from waste catalytic converters: Investigation of hydrogen interaction and thermal behavior
JOURNAL OF MOLECULAR STRUCTURE, cilt.1372, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 1372
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.molstruc.2026.146645
- Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
The rapid depletion of fossil fuels and increasing environmental concerns have intensified the search for alternative energy systems, among which hydrogen is considered a promising candidate. However, the development of efficient and reliable hydrogen storage and interaction mechanisms remains a significant challenge. In this context, nanostructured carbon-based materials have attracted considerable attention due to their tunable surface and structural properties. In the present study, Pt, Pd, and Rh were recovered from spent automotive catalytic converters and converted into autoreducible metal complexes. These precursors were subsequently used to construct yolk-shell type nanostructures consisting of a fullerene (Cs0) core and a noble metal shell. The structural and physicochemical properties of the synthesized Cs0@Pt, Cs0@Pd, and Cs0@Rh systems were systematically characterized by XRD, HR-TEM, BET, ICP-OES, and HAADF-STEM analyses. Hydrogen-related behavior was investigated using temperature-programmed reduction/desorption combined with quadrupole mass spectrometry (TPR/TPD-QMS). The results reveal distinct differences in hydrogen interaction and thermal stability depending on the metal shell. Among the investigated systems, the Pd-based yolk-shell structure exhibits enhanced hydrogen-related response, broader desorption temperature range, and superior structural stability compared to Pt-and Rh-based counterparts. It is important to note that the obtained results are based on relative signal analysis and do not represent absolute hydrogen storage capacities. Instead, the study provides a comparative evaluation of hydrogen interaction behavior in fullerene-based yolk-shell architectures under identical experimental conditions. These findings offer new insights into the role of noble metals in governing hydrogen-related processes in confined nanostructures and may guide the design of advanced materials for hydrogen-related applications.