Catalytic Oxidation of Methane

Methane is 84 times more potent than carbon dioxide as a greenhouse gas and is emitted from power generation, diesel and compressed natural gas engines, gas wells, etc. High-resolution transmission electron microscopy showed bigger Pd particles (5 nm and more) were surrounded by CeO2, resembling a core shell structure. A PdO-PdOx/γAl2O3 catalyst synthesized by a vortex-assisted incipient wetness method exhibited exceptional low-temperature activities, with 90–94% methane conversion at 300–320 °C. X-ray photoelectron spectroscopy established that the active phase, PdOx, originated from the interaction of PdO with the alumina support during the calcination process [14].