Manufacture of highly loaded Ni catalysts by carbonization-oxidation-reduction for dry reforming of methane

作者：Bai, Yue; Shen, Dongyang; Yu, Guowang; Wang, Jie; Lyu, Shuai; Zhang, Yuhua; Wang, Guanghui; Li, Jinlin^*; Li, Lin

来源：New Journal of Chemistry, 2023, 47(36): 17186-17193.

DOI：10.1039/d3nj02582a

• CARBON-DIOXIDE
• METAL-CATALYSTS
• PARTICLE-SIZE
• NANOPARTICLES
• PERFORMANCE
• SUPPORT

The manufacture of high metal loading catalysts is of great interest in heterogeneous catalysis; however, there are challenges in the construction of the catalytic structure, including particle size, dispersion, and accessibility. Herein, we fabricate a high Ni loading catalyst by the carbonization-oxidation-reduction (COR) strategy for low-temperature dry reforming of methane. The carbon coating obtained by carbonizing organic ligands protects Ni nanoparticles from agglomeration and sintering. Subsequent oxidation-reduction treatment sacrifices carbon and causes Ni redispersion, resulting in dual particle size distribution. The sacrifice of carbon enhances the metal-support interaction and the resistance of metal sintering. 30% Ni/MCF-COR exhibits higher and more stable catalytic activity at relatively low reaction temperature compared with 30% Ni/MCF-H2. COR pretreatment is promising in the manufacture of high metal loading catalysts for the conversion of greenhouse gasses. @@@ Highly loaded Ni catalysts with dual size distribution fabricated by COR pretreatment promote carbon dioxide reforming of methane reaction.