MoO3-modified SAPO-34 for photocatalytic nonoxidative coupling of methane

Abstract

Photo-driven nonoxidative coupling of CH₄ to produce valuable hydrocarbons is an attractive potential way to alleviate the energy crisis but is still limited by the lower catalytic efficiency. Herein, a Mo-oxide modified zeolite was fabricated by a facile wet-impregnation method and achieved a CH₄ conversion rate of 4.10 μmol g⁻¹ h⁻¹ (8.04% conversion of CH₄) at 473 K with continuous light irradiation. There is a good volcanic curve between the activity and the content of Mo loading. The effect of heat and light was elucidated, and irradiation was the essential condition for activation of C–H. Combined with experimental and analysis data, regulating the Mo percentage to construct different Mo species and tuning the acidity strength of catalysts are significant for the catalytic activity and stability.