Segregation of Pt and re during CO2 reforming of CH4

Pt–Re supported on Ce0.52 Zr0.48 O2 was studied for the carbon dioxide reforming of methane at 800 °C. Diffuse reflectance fourier transform infrared spectroscopy and temperature programmed reduction studies suggest that Pt and Re segregation occurs during the reaction. The segregation results in an increase in the Pt sites available for CH4 decomposition and results in the bimetallic catalyst exhibiting an increase in the conversion of methane with time on stream. After 20 h of reaction, the CH4 conversion observed for the bimetallic catalyst was the same as the CH4 conversion observed for the monometallic catalyst.