Role of doping concentration on the RWGS performance of Cu doped CeO2 catalysts

Description

Mukesh Khandla and eight colleagues tune a catalyst that turns carbon dioxide back into carbon monoxide, a building block for fuels and chemicals. The reaction, called reverse water-gas shift, runs hot and favours carbon monoxide over methane. The 2026 team made cerium oxide crystals dotted with copper, using a precipitation method that borrows water already inside the starting materials to keep particles from clumping. Batches carried different copper shares and were fired at high temperature, then checked by diffraction, microscopy, and surface analysis.

More copper steadily improved the catalyst's activity at low and moderate temperatures. The best recipe, with 25 mole percent copper in the ceria, converted about half the carbon dioxide fed to it at 800 degrees Celsius. It kept the product selectivity the reaction is known for. The authors present copper loading as a simple dial for performance, useful for schemes that recycle captured carbon dioxide into useful gas.

Catalog record

Source: https://europepmc.org/article/MED/PMC13562600