Work

Efficiency of H2 Production Influenced by CeO2 Content-Dependent Copper–Ceria Interaction

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The interaction between active sites and the support plays a crucial aspect in the methanol steam reforming (MSR) reaction, which often influences the dispersion states and concentration of surface oxygen vacancies (O v ). Here we report the fabrication of copper–ceria catalysts that contain different copper–ceria structures by adjusting the metal loading content. The Ce 0.9 Cu 0.1 O x catalyst shows a H 2 production rate as high as 53.2 mL H 2 ·g cat –1 ·min –1 at 250 °C, benefiting from the highly dispersed Cu species. When the Ce/Cu molar ratio is reduced further, the H 2 production rate continues to decrease due to the agglomeration of Cu. However, O v is another aspect of catalytic performance. The Ce 0.1 Cu 0.9 O x catalyst demonstrates an unexpected rise in the H 2 production rate for its abundant O v . Both the dispersion states of Cu species and the concentration of O v are significant. Among them, the optimal Ce/Cu ratio is 1/9 for CO-free MSR, which is potentially beneficial in a clean H 2 production area.

Source: ACS Omega

DOI: 10.1021/acsomega.4c09751