Akademik Veri Yönetim Sistemi
International Journal of Hydrogen Energy, cilt.214, 2026 (SCI-Expanded, Scopus)
The catalytic performance of silicon carbide (SiC)-supported nickel-iron catalysts with different metal loadings was investigated for methane decomposition in a microwave reactor at various temperatures. The effect of support material was evaluated through comparison with mesoporous carbon (MC)-supported catalysts, and the influence of promoter addition on catalytic activity, stability and carbon morphology was systematically assessed. Among the SiC-supported catalysts, 50Ni–15Fe@SiC exhibited the highest initial methane conversion (70%) with a hydrogen production rate of 103 mmol/gcat.h at 500 °C. The apparent activation energy for microwave-assisted methane decomposition over SiC-supported Ni–Fe catalysts ranged between 55 and 63 kJ/mol. While carbon encapsulation was predominantly observed on SiC-supported catalysts, palladium promotion significantly enhanced catalyst stability and favored the formation of carbon nanofiber. In contrast, for MC-supported catalysts, Ni–Fe alloy formation and carbon nanofibers growth played a key role in improving catalytic performance. The low microwave power input required to achieve high activity highlights the potential of these catalyst systems for energy-efficient hydrogen production.