LOW TEMPERATURE METHANE CONVERSION THROUGH PLASMA CATALYSIS USING BIFUNCTIONAL PEROVSKITES

Abstract

Plasma catalysis has emerged as a promising approach for gas conversion processes such as the Dry Reforming of Methane (DRM), where methane and carbon dioxide are converted into valuable chemicals and fuels. Although significant progress has been made, understanding the synergistic mechanisms between plasma and catalysts remains a critical challenge. This study aims to enhance catalytic performance by incorporating ferroelectric perovskite materials into traditional supports like Al₂O₃ and SiO₂, used with nickel-based catalysts in DRM. Ferroelectric materials with switchable polarization are unique and promising catalyst candidates due to significant effects of polarization on surface chemistry and physics. Ferroelectricity creates localized micro-discharges that intensify the local electric field. This effect promotes the activation of methane and carbon dioxide, resulting in improved conversion rates and yields. The enhanced polarization properties of ferroelectric materials contribute to stronger electron impact collisions, generating a higher density of excited species, which is advantageous in plasma environments. Unlike standard nickel-based catalysts, ferroelectrics-supported catalysts exhibit improved control over electric field interactions near the catalyst surface, thereby supporting sustainable and energy-efficient plasma catalysis. The study’s insights into optimizing the internal electric field with ferroelectric perovskites offer potential for advancing DRM processes and achieving improved product yields and reactant conversion rates in plasma catalysis.