Ru-Ni/GA-MMO composites as highly active catalysts for CO selective methanation in H2-rich gases

作者：Shi, Zhisheng; Feng, Jiacheng; Dong, Xinfa^*

来源：International Journal of Hydrogen Energy, 2023, 48(64): 24640-24651.

DOI：10.1016/j.ijhydene.2022.06.205

• LDHs
• Mixed metal oxide
• Graphene aerogel
• CO selective Methanation
• H2-rich gases

CO selective methanation (CO-SMET) is as an ideal H2-rich gases purification measurement for proton exchange membrane fuel cell system. Herein, the graphene aerogel-mixed metal oxide (GA-MMO) supported Ru-Ni bimetallic catalysts are exploited for CO-SMET in H2-rich gases. The results reveal that a three-dimensional network structure GA-MMO aerogel with higher specific surface area, better thermal stability and more defects or structural disor-ders is formed when MMO:GO mass ratio is in the range of 1-4. After loading of Ru, more NiO are reduced to metallic Ni by hydrogen spillover effect, and thus obviously enhances the reactivity. The GA-MMO supported Ru-Ni catalyst exhibits more excellent metal dispersion, reducibility, stronger CO adsorption and activation than the MMO supported Ru-Ni catalyst, thereby resulting in better catalytic performance and stability. This work offers new insights into the construction of highly active catalyst for the efficient gener-ation of high-quality H2 from H2-rich gases.& COPY; 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd.